ISG Sector Group Technology is a specialized team of IT recruiting experts, supporting our clients in all matters of IT recruiting.

Our core team in Madrid manages processes all over Europe, working with local advisors and our network of more than 30 IT consultants.

We offer all-in-one packages for the advancement of IT employees. Combining the latest tools with the knowledge of experienced professionals, we put special emphasis on the Internet of Things, big data, and artificial intelligence.


In expanding or optimizing your team, we are here to lend a helping hand with job specifications and your network outreach, offering made-to-measure solutions. Our various services and processes help identify areas requiring improvement and implement answers to your IT needs.


All our IT Search & Selection processes are based on an active approach: our IT recruiters will contact IT specialists directly to interest them in our clients’ job offers / vacancies.

Our resources include:

– An internal database

– Social media – active approach (Linkedin, Stackoverflow, Meet Up, Git Up, Xing, etc.)

– Career- and tech fairs

– Alumni networks (of universities and tech schools)

Job ads and campaigns

ISG Media House offers specialized publications on Stack Overflow, GitHub and local IT portals. We administer job ads for IT personnel on the most popular job portals and social media platforms across Europe. We also implement / design / manage Google campaigns to create talent pipelines for our clients.

Employer branding – comprehensive solutions

Our teams for Training & Development and Media House join forces to provide our clients with end-to-end solutions in employer branding.


To improve the soft skills of your IT specialists, we offer trainings ranging from communication to leadership.

For technical trainings, our network of partners provides for the further development of your IT specialists’ programming skills, offering special conditions for ISG clients.


We also offer assessments of your candidates’ programming and overall technical skill set.

Testing junior IT developers is part of our everyday business. We seek to discover talent, analyzing potentials (e.g. logical thinking) as well as existing abilities.

Team Recruitment

We are able put together entire software teams or direct complete SW development projects for our clients. Benefit from our access to a pool of software development teams with different specializations: we assemble the ones most suited for your project outline, budget and time frame.


ISG also offers sub-contracting your future IT personnel.

Interim Management

ISG’s pool of IT interim managers is available across Europe, providing our clients with experienced specialists and executives.

Professionals covered

We work with specialists and place professionals who are starting their careers or want to expand their skills and are looking to take the next step, whether in permanent or project based contracts. Our candidates are passionate about working to innovate with leading technologies and strive for making a difference.

Areas of expertise

We adapt to your individual needs, using our industry expertise and our leading position in developing and implementing solutions, to align our innovations with your specific business goals.


Expert positions

  • Developers (JavaScript, Python, Java, C#, PHP, C++, Go, C, R, SQL, MATLAB, Swift, Objective C, Elixir, Ruby, Kotlin, TypeScript, Scala, Clojure, Erlang, Perl, ColdFusion, ABAP, Delphi, Gosu)
  • IT operations – system administrators (Windows, iOS, Android, MacOS and Linux), network administrators, system engineers, technical/IT support engineers, infrastructure engineers, system/service operation specialists, DevOps engineers, SRE engineers and cloud engineers
  • Architects – enterprise, infrastructure, solution, service, software, system, data/information, network, technology, cloud, security, integration, game, application and virtualization
  • Data – scientists, engineers, database administrators, BI/DWH (business intelligence/data warehouse), analysts and business/system analysts
  • Testers – software testers (manual/automation testers), quality assurance engineers (selenium and apium), test analysts and test managers
  • Designers – art directors, animation designers, web designers, 3D designers, UI/UX specialists, graphic designers, UX writers and product designers

Management positions

  • Executive roles – CTO (Chief Technology Officer), CIO (Chief Information Officer), CISO (Chief Information Security Officer) and CPO (Chief Product Officer)
  • Technology directors – IT directors, Director of Operations, engagement directors, Director of Information Systems,
  • Management roles – PMO, project managers, product managers, program managers, agile coaches, IT/technical project managers, IT risk managers, IT auditors, IT consultants, SAP consultants, guide wire consultants
  • Leading roles – team leads, technical leads, lead engineers, product owners, chief architects, Head of IT, Head of Software Development


Meet the team behind Technology

Simon Leissinger

Sector Head Technology


Having joined ISG in the beginning of 2015 as a Managing Partner for the ISG offices in Spain. Mr. Simon Leissinger possesses profound experience in the IT and international finance sector. Previously, he has drawn invaluable experience from IT focused recruiting companies.

His strong expertise, especially in the Spanish and German speaking markets, makes him an invaluable asset to the entire ISG organization. Since joining ISG he has consistently worked with Spanish talents and supports them in their expatriation to the German speaking markets.

Simon Leissinger has a special interest for ERP (SAP, Oracle and PeopleSoft) and Enterprise Cloud / Mobile services and has a good overview of the international market in these sectors.

Recognizing the growing need of highly qualified IT experts in countries like Switzerland, Germany and Austria, Mr. Leissinger is currently focusing mainly on the qualitative and quantitative development of this specific talent pool and HR-pipeline. Mr. Leissinger is providing his professional advice in helping expatriates adapt to their new intercultural environments and local market cultures. Furthermore, Mr. Leissinger built up a network in Spain to help candidates learn the German language before entering the market.


Éva Fehér

Senior Consultant, Executive Coach, Head of Execuitve Search & Headhunting


After graduation from the Budapest College of Economics and Business Administration, Éva Fehér started her professional career in international sales. As a result of her self-starter and success-orientated personality, she was responsible to develop new markets and worldwide launch innovative products of a Biochemical Manufacturer. After 7 years spent in international business development and having gained first leadership experiences, her scope of responsibility was widened when she was appointed to manage the whole Sales,Marketing&Logistic Unit. Due to her interest and know-how of organisational and process development, she was also involved in strategic HR management, designing and implementation of new HR processes.

In 2006, taking use of her corporate experiences, she started with personnel consulting at CATRO Management Consulting and successfully coordinated search &selection of specialists and executives.

She joined ISG team as a Senior Consultant in 2010 and she has been working for her Clients from various industries (services, IT/Telecommunication, production, trade). Beside personnel recruitement and head-hunting, she makes evaluations (assessment center, development center, tests, management audits) and several HR-related surveys (e.g. wage-survey, HR-market survey).

Tailor-made, result-orientated approach and high performance characterise her work.

The main focus of her activities:

  • Search and selection of Candidates
  • Direct search, head-hunting
  • Executive search
  • Design and implementation of evaluations, work out HR-surveys
  • Project management in international projects
  • Outplacements

Language knowledge:

  • English: advanced level
  • German: communication level

Motto: “Change your thoughts and you see the world is going to change accordingly”


Dipl. Ing. Klaus Gieber

Managing Partner


After finishing his studies in mechanical engineering at the Vienna University of Technology, Klaus Gieber started with an Austrian CAD provider as a product manager.

After several successful years he switched to an international software house for process control engineering, where he continued to work as a member of the board (CTO and HR). In this role, Mr. Gieber was responsible for building up the organizational structure of the company including the establishment of subsidiaries in Germany, Switzerland and Holland, as well as increasing personnel from 20 to 140 employees. He was responsible for the implementation of an employee stock ownership programm, the introduction of a new salary structure and the realization of a Management-Buy-out.

As an independent consultant, Mr. Gieber also took over the management and coordination of ERP migration projects.

Based on his professional experience Klaus Gieber is available for all your personnel consulting concerns.


Mag. (FH) Sebastian Widmoser

Managing Partner


Sebastian Widmoser studied Human Resources and organizational studies at the Management Center Innsbruck. In the course of his professional career, he has gained a lot of experience as a specialist and executive staff member in Austrian corporations with international context.

His focus in personnel management lies on the field of in-firm training and on-the-job training as well as on personnel development and coaching. He used his broad experience in handling projects such as the introduction of SAP modules in the personnel administration and development.

In 2007 he started at the ISG International Service Group as Managing Partner for Tyrol, Vorarlberg and South Tyrol.

His role includes recruiting, structuring adult education, developing business ratios concerning human resources as well as qualitative and quantitative company manpower planning.

Thanks to 18 years of professional experiences in the middle and upper management he is a competent partner in all HR belongings.

His main focus is:

  • Personnel Selection & Search for specialists and executive staff with an emphasis on engineering and industry especially in the field of Executive Search
  • Quality leasing for technicians and higher administrative positions
  • Creating conceptual designs for leadership trainings and team development
  • Conducting workshops and systemic coaching for specialists and executive staff

Motto: “He who is not contented with what he has, would not be contented with what he would like to have”.(Socrates)


Michael Bruhn

Country Manager


Michael Bruhn is co-founder (in 1998) and owner of Recruiters Search & Selection, and has since 2017 been the Country Manager for ISG Denmark.

He has a BA in Economics and 15 years of experience from Danish and international IT-Companies as IT-Consultant, Trainer, Marketing Consultant and Partner Relation Manager.

Michael recruits across all management disciplines providing clients with a tailored search, advertised selection, recruitment support and assessment solutions as required. Furthermore, he can offer tailored outplacement support adjusted to the individual needs of employees.


Dr. Gottfried Jägersberger

Senior Consultant


After completing secondary school Gottfried Jägersberger graduated from a university of applied sciences degree program for military leadership. Working in various capacities with personnel and disciplinary responsibility for up to 200 employees he gained extensive experience in training, further education, and managing employees.

After graduation in the social and economic sciences he shifted his professional interest to the field of personnel management. Gottfried Jägersberger joined the ISG team in Oberwaltersdorf in the fall of 2010.

Areas of consulting:

  • Personnel search and selection
  • Executive Search
  • Development of individual assessment centers
  • Micro-politics and lobbying

Viktória Kaposvári

Senior Consultant, Head of Direct Search & Selection Division



College of Zsigmond Király, Budapest
HR Manager, BA

Professional career

2010- ISG Personalmanagement

Kft. Research & Administration Manager

  • Preparing Search&Selection and Training projects;
  • Contracts and Tender proposals;
  • Research – monitor of different market segments, identify relevant potentials, contacts;
  • Responsible for the work of Researchers; Developing internal processes;
  • Keeping contact with the International subsidiaries Coordinating the complete advertisement process and keeping contact with Media Agencies;
  • Supporting the work of General Manager and Senior Consultants.

2008-2010 International Management Consulting Company

Office Manager

  • Secretarial duties;
  • Creating, keeping and developing the administration records;
  • Doing financial tasks and invoicing;
  • Coordinating the complete advertisement process and keeping contact with Media Agencies;
  • Finding the best Suppliers and keeping contact with them;
  • Reception of Clients and Candidates;
  • Supporting the administration work of General Manager.

2007 Multinational IT Company

Partner Program Expert

  • Handle and maintenance of SAP CRM & PRM (Customer and Partner Relationship Systems), data quality control;
  • Keeping contact with Partners, and providing professional support;
  • Following the status of Partner Contracts, giving support for creating Business Plans;
  • Supporting the administration work of Partner Manager.

2004-2006 Sales Support Hungarian Owned Company

Office Manager & Personal Assistant

  • Secretarial duties;
  • Arrangement of Company events, business trips and business meetings;
  • Supporting of General Manager;
  • Personal Assistant task;
  • Coordinating of the office tasks(financial, administration);
  • Invoicing.

1999-2003 Executive Distributor of Sport Equipments

Office Manager

  • Secretarial duties;
  • Handling orders;
  • Keeping contact with foreign partners;
  • Developing and handling documentation system;
  • Supporting of General Manager;
  • Participating on Competitions and treating of Sponsored Players.

Language Knowledge

English: advanced

German: communication


Oliver Hammer



Oliver Hammer is a partner of ISG Personnel Management in Russia.

Born in Germany orginally, he has lived since 2005 in Moscow, Russia.
He graduated from the University of Applied Science Dresden and Moscow State University of Railway Engineering (MIIT) in Business Informatics in 2006 with a double diploma.

Before this he successfully finished a traineeship in wholesale & foreign trade, gained his first professional experience at Vodafone Germany in Munich and IBM, Stuttgart.

First years in Russia he was gaining wide experience in the IT & business consulting sector, after that he changed to the Banking/Financial Service sector. Since 2013 Oliver finally has changed to recruitment industry and became Director of Business Development at an international idependent Executive Search firm.

In addition to his professional activities, Oliver Hammer is an active member of the Rotary Club Moscow Metropol.


Lorenzo Molinari

Senior Consultant


After his technical apprenticeship with ABB (former BBC) in Zurich, Lorenzo Molinari worked in the field of project management for different departments within ABB. During this time he successfully completed an evening business school in Zurich.

November 1992 he moved to Hungary. From the planned six months stay he finally remained for 8 years, during which he was working for the internationally highly recognized BERLITZ language school.

By the end of 2000 he returned back to Switzerland and worked with Credit Suisse in the HR department of the Private Banking International division supporting HR Business Partners.

Lorenzo Molinari joined ISG Personalmanagement Ltd Hungary October 2006 as HR consultant. Since then he established a wide business network. Thanks to his knowledge of both Swiss/German and Hungarian cultural and social aspects he is able to support his clients in an effective way. He is a native German speaker, and fluent in Hungarian, English, Italian and French.

Motto: “There is no meaning in life if everything ends with death.” Silo


Dr. Rupert Schmutzer

Executive Search/Managing Partner


Dr. Rupert Schmutzer has more than 10 years of experience as management consultant for business transformation and IT alignment.

While working for top consulting companies (KPMG, Accenture, IBM, act management consulting) serving top clients he achieved proficiency in professional services and gained deep insights into IT business.
With these challenges he was able to collect experiences and knowledge in various fields like strategy, project management, business development, key account management and sales.

Rupert has grown in his professional career  into a position as trusted advisor for decision makers. He has always developed and established long-term  relationships with clients.

Rupert is  your professional contact for quick and reliable staffing of mission critical positions in IT business and professional services.

Motto: „Connect people who make a difference with challenges that matter.“


Nicole Taumberger (Schneider)

Country Manager / Senior Consultant


Nicole Taumberger has broad experience in the areas of recruitment, executive search and personnel development.

With her proven track record in developing search and recruitment strategies as well as with her profound business knowledge she is the ideal partner for your success. Nicole Taumberger brings in-depth experience in recruitment of specialists and executive search.

As a country manager at ISG Switzerland, Nicole is successfully responsible for the expansion and future development of ISG Switzerland in the area of ​​personnel consulting since 2010.

With her many years of professional experience as a consultant, paired with her market-oriented, cultural and professional knowledge in all manner of personnel consultancy you will find a competent and professional partner with Nicole Taumberger.

Areas of Expertise:

  • Search & selection of specialists and executives
  • Executive Search
  • Specialist in computer science
  • Human resources development

Motto: “We can’t change the direction of the wind, but we can help you to adjust the sails!”


Peter Wadsholt

Country Manager


Peter Wadsholt is Country Manager in ISG Sweden, ISG Finland and ISG Latvia.

He has degrees in Law, Computing, Economics and NLP and 28 years of experience from Danish and international companies as Business Builder, Sales Executive, Executive Management and Lawyer.

Peter recruits across all management disciplines providing clients with a tailored search, advertised selection, recruitment support and assessment solutions as required. Furthermore, he can offer tailored outplacement support adjusted to the individual needs of employees.


Peter is a member of the Danish-German Chamber of Commerce (Dansk-Tysk Handelskammer / Deutsch-Dänische Handelskammer) and is an expert in cross-border recruitment between Denmark, Germany and Sweden.


Fabiola Carretero


ISG International Service Group
Calle Viella 21
E-28040 Madrid


Fabiola Carretero achieved her Bachelor´s Degree in International Relations from the University of Rey Juan Carlos in Madrid. During her studies, she had the opportunity to study in Germany for a semester, which not only helped her improve her language skills, but also taught her how to operate in multinational environments due to the cultural diversity of her peers there.

After finishing her studies, she decided to direct her professional future towards the field of human resources. Thanks to her time at ISG as a scholarship holder, she had the opportunity to acquire and develop skills, both personal and specifically in IT knowledge, which now allow her to successfully carry out talent acquisition processes. In addition, her knowledge of English, French and German and, interest in learning from other cultures, permit her to be capable of carrying out international projects, especially at the European level.


Bogdan Filipescu

Business Development

18 Viitorului st.
RO-020612 Bucharest


Bogdan joined ISG in 2006 as a business development manager and senior consultant.

He specializes in senior executive positions in Industry and Building & Construction. Having held senior positions in various international companies, Bogdan has gained considerable experience in a variety of industries in Romania and Central and Eastern Europe.

Before joining ISG, he served as an IT Division Manager in a large retail company.

He graduated from the Academy of Economic Studies in Bucharest, Romania.


Jaroslaw Gorzko

Managing Partner/Country Manager


Senior international business executive with over 19 years record of business management experience, operations management, sales and marketing, new business development and human resources management. Has worked in executive positions as a president, board member, managing director and country manager for multinational companies in Poland, Germany and in Canada. Masters Degree in International Business from Carleton University in Ottawa, Canada as well as postgraduate diploma in International Trade and in International Marketing. Management Certificate from the Harvard School of Business.
Accomplished team leader with broad experience in effective recruitment, team building and team development in multinational and multicultural environment. Over the past 19 years has worked for Canadian, American, British, German, Swedish, Irish, Spanish and Polish companies. Great network of business contacts in Poland as well as in the CEE Region.

Excellent communication and interpersonal skills with ability to effectively manage, delegate, communicate, negotiate, network and to make presentations in three languages (Polish, English and German).


Karmele Guibert


ISG International Service Group
Calle Viella 21
E-28040 Madrid


Karmele Guibert, graduated in 2017 with a double degree in International Business and Economics. After a first professional experience at Volkswagen Navarra in the HR and Communication department she decided to move her career to the HR consulting side. Since then, she has been focusing on projects all over Europe with a special focus on the IT and Automotive sector. Having a very profound understanding of different HR processes thanks to her experience at ISG and completing an additional Masters degree, she has been able to successfully guide candidates and find the right match.

Karmele enjoys working on cross border projects and assists clients in all phases of the process, trying to find the perfect balance between the client’s requirements and the expectations of the candidates. She has a special focus on supporting candidates in their relocation within the EU, guiding them throughout the process and preparing them for the cultural changes.


Hugo Hill


ISG International Service Group
Calle Viella 21
E-28040 Madrid


Hugo Hill, has been raised in a bilingual environment with connection to British and Spanish culture, while also having briefly lived in Germany allowing him to learn German to a good level. Since his childhood days he has been enthusiastic about the IT world, thus deciding to pursue a degree in this field.

He ha also noticed that he has always had a great affection for multicultural settings and interacting with people of different nationalities on a daily basis. Which is why he specialises within ISG on developing positions all over Europe and works with talents from all around the globe. Helping connect suitable candidates from every corner of the world to leading companies is his passion.


Ing. Hans Georg Stadlober

Senior Consultant


After the studies at the technical collage HTBL Engineering / Foundry Technology in Vienna he started his career at a well-known company in the metal industry (Hutter & Schantz), where he passed different departments, starting as technical designer. Finally he became a member of the sales team. As a sales representative of the company he visited architects, designer, building companies and private clients on order to make business with them.

Through a career move into an international company in the steel industry (Bekaert), he developed within ten years from sales representative to the local CEO of Austria. His function was to led the CEE region as a sales manager of building products. He was responsible for the selection and training of his employees in this region. During eight years he realized the objectives together with his team with great success. Reporting and participation in global processes for developing the division took on.

Hans Georg Stadlober thus spent two years as a member of the central team at the headquarter in Belgium. As a marketing specialist, he developed new services and products and strengthened further development and communication within the division worldwide. Recently, he took during three years the position as CEO of a major German steel group (HOESCH Bausysteme, a group member of ThyssenKruppAG) . As head of the lead company in the CEE region, he was responsible for the different sales offices and two production facilities.

Ongoing internal and external training accompanied him throughout his professional career. He has extensive experience with the function of different positions in particular in international production companies, construction and related trades. The tools of modern business management he is well known as a critical user. One of his key success factors is the recognition of the importance of motivated, qualified employees how to achieve this status and to reinforce them.

Early 2011, he took the decision to join ISG. His aim is, to use his knowledge in order to serve companies and candidates in a professional manner, to educate and train people as an executive can.


Michèle Oeschger

Managing Partner


Michèle Oeschger works since 1998 in the IT recruitment field. Since 2000 she is specialised in recruitment of IT professionals and IT leadership.

Through many years of activities, focused on the IT sector, Michèle Oeschger possesses a wide network – both as well from a custom as from a candidate side – and has a very good overview and an excellent know-how portfolio in the IT world.

Providing personal and individual support and the relationship of trust with candidates and clients are the principle and basis for a successful and target-aimed cooperation.

Clients find their IT know-how specialist through the excellent network of M. Oeschger, and she supports IT specialists in their career development to the next step.

The ISG – International Service Group Schweiz GmbH – focuses on the personal selection and recruitment of IT professionals and IT leadership. Our clients are from industrial, service and financial sectors. They are active in national and international business. Our service includes the search for IT candidates, who have obtained the mandated professional level at home, as well as in foreign countries.

A flat corporate structure, a homogeneous operation, discretion and reliability, flexibility and customer focus of our employees, as well as an excellent price / performance ratio represents the company mission with the headquarter in the east of Switzerland.


Lasse Ohlsson

Managing Partner


Lasse Ohlsson is Managing Partner in ISG Sweden and based in Stockholm.

He has many years of experience from working in purchasing, sales, marketing, general management positions and with recruitment in FMCG, retail and industrial companies such as ICA, MoDo, Colgate, Duracell and Gillette/Procter & Gamble in the UK, Nordics/Baltics and Asia Pacific.

Degree in Business Administration and Marketing followed by studies at Stockholm School of Economics (IFL/SSE) and Executive MBA.

With experience from supporting international companies establishing enterprises in new markets in Europe and Asia Pacific he has been working with business development, organisation changes, international recruitment, training & development and coaching.

Lasse recruits domestically and cross-border across all management disciplines providing clients with search & selection, recruitment support and assessment solutions as required. Furthermore, he can offer interim management and strategic support within business development, reorganization including tailored outplacement support adjusted to the individual needs of employees.


Lasse is a member of the German – Swedish Chamber of Commerce (Tysk – Svenska Handelskammaren / Deutsch – Schwedisch Handelskammer) and is specialized in cross-border recruitment between Sweden, Germany and Denmark.


Yuri Orlov

Executive Managing Partner

ul. Wały Piastowskie 1/812
80-855 Gdańsk, Poland


Senior professional with 20+ years’ of international experience in general and operational management, business development, sales and marketing, as well in investment management.

Before getting involved in executive search, Mr. Orlov was active for many years in Category Management and Business Development in REWE Group with responsibilities for operations and business development of the retail chain in Austria, Czech Republic, Romania and Ukraine. Further he developed his career managing different commercial property development and investment companies in Germany and Czech Republic and was also a board member in a famous Czech property investment company with a portfolio of about 250M EUR.

In 2009 Mr.Orlov has joined a German executive search company as partner and regional director. Since that time he is an experienced global recruitment and executive search professional with about 10 years’ experience in the industry. Over 1400 projects completed to date. Focused on both senior and middle level management assignments across a broad range of industries in the CEE Region. Successfully completed cross-border projects in Germany, Austria, Czech Republic, Poland, Ukraine and the Baltic States markets within IT, Telecom, Real Estate, Retail, Manufacturing, Industrial, FMCG and other sectors.

He holds a master’s degree in Philology, another master’s degree in Marketing and MBA in Construction and Real Estate from the University of Reading (UK). He is fluent in English, German, Czech, Polish, Russian and Ukrainian languages and speaks some Spanish.

Core Industries:

  • Property and Real Estate
  • Retail
  • IT & Telecom

Country Focus:

  • Poland
  • Czech Republic
  • Baltic States

Steen Ørnslund



Steen Ørnslund is Partner in ISG Denmark.

He has many years experience from working in different positions on top level in international companies in Denmark as well as abroad.
He is educated from Copenhagen Business School.

Steen recruits across all management disciplines ( C-level and Managers) including boards, providing clients with a search, advertised selection, recruitment support and assessment solutions as required. Furthermore, he can offer tailored outplacement support adjusted to the individual needs of employees.

Steen also works as a censor on Board Governance education programs.


Sergio Rivera, BSc


ISG International Service Group
Calle Viella 21
E-28040 Madrid


Sergio Rivera is Business Administration graduate from Saint Louis University where he discovered his talent for Human Resources. During his studies, he had the opportunity to specialize in accounting and finance, representing his university in international competitions. He’s lived and worked in both Europe and North America and understands how to operate in both markets professionally.

After his studies, he entered the Human Resources sector where he began his career and applied theory to the real world. He’s also gained experience in the retail, education, and tourism sectors throughout his life. Currently, he is a search and selection consultant, and manages the ISG social network marketing channels.

His focus is on providing solutions to the IT and Finance sectors selecting intermediate and management profiles.


Katharina Rudolf, MA

Managing Partner

Horneckgasse 10
A-1170 Vienna


As part of her bachelor’s degree in “Management – Entrepreneurship”, Katharina Rudolf has specialized in HR management and gained professional experience in this area. While studying for her master’s degree in “European Economy & Business Management”, she worked in an Austrian boutique recruitment consultancy, where she gained experience in particular in the areas of IT and telecommunications, finance, industry and in the start-up industry.

Katharina Rudolf has been Managing Partner of the ISG in Vienna since 2018 and serves currently national and international clients in the areas of IT, industry and healthcare.

Her IT affinity and strong customer and candidate-driven approach characterizes her work as well as trust, discretion and flexibility.

Personal industry focus:

  • General Industrials
  • Packaging Industry
  • IT & New Technologies
  • Healthcare & Life Science
  • Chemicals & Materials
  • Start-up Industry

Motto: “Hire Character. Train Skill” (Peter Schutz)


Alisher Sadvakassov


ISG International Service Group
Calle Viella 21
E-28040 Madrid


Alisher Sadvakassov has a Bachelors degree in Business Administration from Saint Louis University in Spain. Right after the graduation, he started his professional career in the field of business development for an IT start-up company. Later on, due to his profound knowledge of IT sector and high interest in the HR processes and functions, he changed his professional path in the direction of IT rectuitment. Starting as an intern and now working as a consultant at ISG Spain, he is specialized in the international markets. Thanks to his previous international experience, he perfectly understands different cultures and finds great ways of communication with international candidates. Having lived in many of former Soviet Union countries gives him great awareness of the CIS market.


Mag. Elifa Velagic

Senior Consultant


Elifa Velagic completed her studies in International Business Administration with an emphasis on International Business, Human Resource Management and Austrian & European Labour and Employment Law.

During her studies she participated in several exchange programs in Kiev, Hanoi or Yogyakarta and got the possibility to enhance her technical and intercultural competences. She also gained practical experience from several internships, especially in the field of recruiting at a well-known Austrian company.

At the end of 2010 Elifa Velagic started her career at ISG. As a Consultant she is responsible for international Search & Selection Projects and supports customers of different sectors and industries.

Motto: „To be able to start is strength. To be able to finish is power.” Lao-Tse


Peter Wadsholt



Peter Wadsholt is Partner in ISG Denmark.

He has degrees in Law, Computing, Economics and NLP and 28 years of experience from Danish and international companies as Business Builder, Sales Executive, Executive Management and Lawyer.

Peter recruits across all management disciplines providing clients with a tailored search, advertised selection, recruitment support and assessment solutions as required. Furthermore, he can offer tailored outplacement support adjusted to the individual needs of employees.


Peter is a member of the Danish-German Chamber of Commerce (Dansk-Tysk Handelskammer / Deutsch-Dänische Handelskammer) and is an expert in cross-border recruitment between Denmark, Germany and Sweden.


Sabine Wimpissinger


ISG International Service Group
Calle Viella 21
E-28040 Madrid


Sabine Wimpissinger joined ISG Spain as a Partner in 2017. Sabine brings many years of international experience in the regulatory, public affairs, communications and legal areas, being a lawyer by background and having been based in Vienna, Brussels and Madrid as a communications and public affairs consultant as well as initially as a trade diplomat. Her experience covers EU-wide projects with particular knowledge of the Austrian, German, Swiss, Scandinavian, Spanish, Belgian and French  markets. Sabine has worked with a broad variety of sectors and policy areas including environment, energy, trade, food, consumer, health and digital policy and she advises clients on the recruitment of profiles in the functional areas related to regulatory, legal and public affairs as well as to communications. In accordance with her multi-cultural background she helps companies and organisations regarding needs for international positions.

Sabine is a dual citizen of Austria and Sweden. She has a Master´s degree in law from the University of Vienna and she also holds a Master of international politics from the Université Libre de Bruxelles. In addition to her native German and Swedish, she speaks fluently English, Spanish, French and Portuguese.


Alket Xhemali

Managing Partner

1507 Colorado
US-77007 Houston


Alket Xhemali started his professional career as a trainee for the Human Resources Department of the United States Army Civilian Support Contractor in Albania and later he was entrusted with supervisory responsibilities in Human Resources in Albania and Kosovo. Following that he became an HR Professional working for a US based companies in the Middle East and Central Asia.

Alket Xhemali spent 10 years working for Halliburton/KBR in various HR management positions in Middle East and Asia and in Houston, Texas performing as HR lead in various business segments in Government Operations and Hydrocarbons. He later joined Fluor in the Middle East for another 7-year assignment in charge of talent sourcing and management.

Alket is a member of the Society for the Human Resource Management and has over 18 years in experience in Human Resources covering the majority of the discipline in various business segments.

Alket Xhemali joined the ISG team in the summer of 2018 and will be representing ISG in the United States, with a primary focus in Texas.

As an ISG Alket will be supporting his customers in the following areas:

  • Recruitment of mid-level management upwards for all the growing industry sectors in Texas.
  • Executive search of senior level management personnel for Construction, Engineering, Energy and Financial sectors.
  • Outplacement services.
  • Talent pool development for the above-mentioned areas.

Motto: “Perfect is boring.”


David Gökcedag

Managing Partner

ISG Personalmanagement GmbH


David Gökcedag joined ISG Personalmanagement GmbH as Recruitment and Talent Search Partner to support our valuable clients in the Software Sector by evaluating Specialists and Managers especially in Software Development, Software Design and Architecture, and Product & Project Management positions throughout the EU leveraging our over 650 ISG employees.

He is a member of our IT Sector Group focusing on Telecommunications, Information Technology and Software Development.  David is an Industrial & Management Engineer having completed his technical education with honors from the Rensselaer Polytechnic Institute in Troy, New York.

Fluent in English, Turkish, German and Spanish David was a Business Developer and Project Manager for the last 20 years, providing a wide range of consultancy services to companies developing their international business in Turkey and other emerging markets.  He has experience both with global corporations (General Electric) and start-up companies having established a successful software company in Istanbul which he is still currently advising as board member.  He gained valuable market know how for very well-known SME’s as well as international corporations from the USA, UK, Spain, Turkey, China and Germany.

You will find in David an experienced professional with a vast range of expertise for:

  • Recruitment & Selection of IT Specialists and Leaders
  • Design and Implementation of Digitalization & Change Processes
  • Training & Development

Motto:  “Be the Change you want to see in the World” (Mahatma Gandhi)


Patrick Adler, M.A.

Senior Consultant



  • Search & selection of specialists and executives (active sourcing)
  • Head hunting for sector experts in executive search projects
  • Support and consulting for companies
  • Sector expertise in (excerpt): 
    Producing Industry (metal processing + electrical engineering + synthetics) | Automotive | Building & Construction | Transport + Logistics | FMCG (food)


  • Master’s degree in Business Consultancy and Corporate Management at the University of Applied Sciences of Wiener Neustadt
    Main focus: leadership | management | strategy | personnel
  • Bachelor’s degree Business Consultancy at the University of Applied Sciences of Wiener Neustadt
    main focus: management | organization | personnel | real estate management
  • Professional development in:
    Employer branding | advisory expertise | management + leadership | presentation techniques | profiling in recruiting | labor law | project management + team organization |
    strategic competence management | train the trainer
  • Perennial practical experience in:
    Personnel consulting | recruiting | active sourcing | project management 


  • High level of flexibility and commitment
  • Reliability | discretion | professionalism
  • Enjoys working with people
  • Enthusiastic about individual consulting

Thomas Windhager, B.A.

Executive Managing Partner

Manhartstrasse 1
A-2000 Stockerau


For over 28 years, Thomas Windhager has been working in sales, covering positions from account manager to executive. Correspondingly, he is deeply familiar with the industry and has gained his insight working with national and international companies.

For him, people always are at the center of any corporate activity: from building a new sales team to the strategic positioning a new product. This approach was also central to him when, as a head of sales, he was putting together a sales team for an international manufacturer of office machines.

As founder and managing director of an IT company that acted as general agency for Dictaphone in Austria, he was responsible for sales and marketing agendas.

After his career in the IT industry, he studied Aging Services Management, dealing with demographic change in our society, at Ferdinand Porsche University of Applied Sciences.

His key competences in consulting lie in IT and in recruiting for sales and management positions.

His credo is: “We can only achieve our goals together, taking into account the needs of all parties involved”.


Achim Töpfer

Managing Partner


Achim Töpfer is your ISG consultant and contact in all matters pertaining to information technology (IT).

After studying Business Information Technology in Aachen and Wedel, Mr. Töpfer started his career at a logistics subsidiary of Unilever. There, he he optimized processes of goods distribution and implemented the automation of data communication.

After having also served as a head of application development, Mr. Töpfer launched his own IT consulting firm in Hamburg with a near-shore subsidiary in Odessa (Ukraine), specializing in consulting banks and financial service providers.

Mr. Töpfer has gained a lot of experience in accompanying personnel selection, especially in phases of implementation of new technologies, leading to him developing specialized services in personnel consulting and recruiting for specialists and managers. When joining ISG as a Managing Partner, he professionally expanded ISGs services in personnel consulting correspondingly.

Key competences in consulting:

  • Custom-fit Search & Selection of IT specialists and managers for companies; special expertise in banking and financial services
  • Interim project- and line management in IT
  • Analysis of personnel requirements and HR planning in IT; Training & Development in IT

Robin Macharia

Managing Partner


Robin Macharia made his first experiences in the tourism industry, where he worked active in various positions.

Then he moved to a personnel consulting agency, where he was able to gain his first experiences and later he joined ISG as Managing Partner.

For him it has always been a passion to help people to realize their dream jobs and to connect talented professionals with top companies worldwide.

He completed his Bachelor of Arts at the NHL Stenden in Leeuwarden, The Netherlands, with Focus on international hospitality management.

Mr. Macharia is specialized in the placement of specialists in the IT sector, electrical and mechanical engineering.

Further special fields are sales, technical purchasing and construction.



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