… your competent partner in all personnel matters!

Our consultants support you throughout Switzerland in almost every province. Our staff has well-founded, extensive, and diverse know-how in virtually all industries and occupations, as well as many years of experience. As a full-service provider in all personnel matters, we offer services in the areas of executive search, personnel consulting, personnel development, potential analysis, outplacement and temporary work.


Meet the team behind Switzerland

Nicole Taumberger

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!”


Daniel Odermatt

Managing Partner


After completing my professional training in the hospitality sector, I spent some “years of apprenticeship and peregrinations” in the gastronomy and hotel industry before I transitioned to personnel placement some 20 years ago.

Complementing my first-hand experience, I dedicated some time to further training in subject-specific matters and personal development (Personnel Specialist, Adult Educator, Higher Diploma in Business).

In recruiting, I focus on the sectors Industry / Technology / Construction.

A very important aspect of my approach can be summarized as follows: “Listen well and take your vis-à-vis seriously”.

In this spirit, I’m looking forward to hearing from you!


Viktor Ledermann

Managing Partner


Viktor Lederman looks back on many years of professional experience as a personnel manager in industry, trade and IT. Combining his initial technical education with advanced business management training, Mr. Ledermann has to offer in-depth specialist knowledge and experience for the search and recruitment of specialists and executives.

Listening and clarifying a wide range of requirements is a skill that takes learning. For Mr. Ledermann it’s the foundation of his work, like finding and assembling the individual pieces of a puzzle to form the finished picture. 

Main areas of consulting:

  • Industry and commerce
  • Skilled crafts and trade
  • Information technology and administration
  • Trade and sales
  • Personnel development

Motto: “What we do today is the outline of tomorrow’s painting.”  (Monika Minder) 


Lukas Bühler

Managing Partner


I gained my first professional experience in retail and subsequently completed a degree in Business Administration and a trainee program in commerce. After two years of working in the retail sector, I decided to get into staffing in 2016. I have mainly been placing commercial specialists. Thanks to my experience and a talent for matching people, I am the right person to turn to for your staffing needs.

Main areas of consulting:

  • Search & selection of specialists and executives
  • Specialists in the forwarding industry
  • Specialists in the telecommunications industry
  • Professionals in banking and finance


“Rather than banging your head
against a brick wall
You should use your eyes
to find the door.”


Rachel Buchbinder

Managing Partner

ISG Personalmanagement Schweiz


Rachel Buchbinder gained her first experiences in various business/commercial functions and areas before changing into the job placement sector after a stay abroad.

Since 2004, including a two-year maternity leave, Rachel Buchbinder has been placing mainly business specialist in various companies with great success. Thanks to her empathy and tact she is able to connect compatible parties.

Due to her extensive experience she has a wide range of specialist knowledge at her disposal.

Languages: German, English, French (Italian and Spanish)

Focus areas:

  • Search & selection of junior employees, specialists and leaders
  • Executive Search
  • Specialist in the business/commercial sector
  • Coaching of candidates

Motto: The journey of a thousand miles starts with the first step.


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.


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)


Martina Zellweger, BLaw

Managing Partner


Martina Zellweger verfügt Dank ihrem Jura-Studium über ein universales Fachwissen und über hervorragende Kommunikationsfähigkeiten, welchem ihrem ausgeprägten Verhandlungsgeschick dienen. Ihre ersten Berufserfahrungen sammelte sie in der Versicherungsbranche und einer Revisionsgesellschaft, als sie sich entschloss in die Personalberatung zu wechseln. Seit 2018 hat sich Martina Zellweger auf die Vermittlung Fach-und Führungskräfte inklusive C-Level vorwiegend im kaufmännischen Bereich spezialisiert.

Mit ihrer professionellen, dienstorientierter und emphatischen Art unterstützt Martina Zellweger Sie auf der effizienten Suche nach dem perfekten Kandidaten oder perfekten Arbeitgeber und findet so für Sie den „Perfect Match“.

Motto: “Wer kämpft, kann verlieren. Wer nicht kämpft, hat schon verloren.” (Bertolt Brecht)


Monique Leeser

Managing Partner


Monique Leeser ist eine leidenschaftliche Recruiting-Expertin mit über 20 Jahren praktischer HR-Erfahrung in verschiedenen Branchen. Ihre fundierte Expertise umfasst Bereiche wie Talent Acquisition, Recruiting-Strategien, Führungskräfteentwicklung und HR-Management.
Mit ihrer langjährigen Erfahrung und ihrem tiefgreifenden Fachwissen entwickelt sie massgeschneiderte Lösungen, um die besten Talente für Unternehmen zu gewinnen. Ihre Leidenschaft für Innovationen in der Personalgewinnung treibt Monique stets dazu an, nach den neuesten Trends und Technologien Ausschau zu halten

Monique bietet Ihnen folgende Services und Dienstleistungen:

  • Talent-Matchmaking und -akquise


Motto: “Wähle den Beruf, den du liebst, und du brauchst keinen Tag in deinem Leben mehr zu arbeiten.” (Konfuzius)


Dipl. Ing. Thomas Winternitz



Thomas Winternitz ist ein Diplomingenieur, der seine Arbeit mit voller Leidenschaft ausübt. Sein abgeschlossenes Maschinenbaustudium und seine langjährige Fachexpertise bieten ihm die ideale Grundlage für eine gezielte Auswahl von Fach- und Führungskräften im technischen Bereich.

Durch seine langjährige Tätigkeit als Selbstständiger konnte er bereits vielfältige Facetten der Beratung kennenlernen.

Seine Schwerpunkte in der Beratung umfassen:

  • Suche und Auswahl von Fach- und Führungskräften
  • Fachspezialist im technischen Bereich

Sein Motto lautet: „Der Kunde steht an erster Stelle“ – „Ich werde das Unmögliche möglich machen!“



Emin Bayram, B.A.

Managing Partner


Emin Bayram ist ein erfahrener HR-Experte mit einem vielseitigen Hintergrund in HR-Management, Recruiting und Coaching. Seine umfangreiche Erfahrung im Recruiting, der Schaltung und Überwachung von Stellenanzeigen auf verschiedenen Jobplattformen sowie der Koordination und Durchführung von Bewerbungsgesprächen zeugen von seiner Fachkompetenz.
Mit Leidenschaft für die Gestaltung optimaler Übereinstimmungen zwischen Kandidaten und Unternehmen steht er seinen Kunden engagiert zur Seite. Als erfahrener Experte in der Personalvermittlung mit einem Hintergrund in Internationaler Betriebswirtschaftslehre bietet er innovative und effiziente Lösungen, um die vollste Zufriedenheit seiner Kunden zu gewährleisten.


  • Suchen & Auswahl von Junior-, Fach- und Führungskräften
  • Executive Search
  • Coaching von KandidatInnen

“Der Kapitän wird nicht nach den Stürmen beurteilt, denen er begegnet,
sondern danach, ob er das Schiff erfolgreich in den Hafen bringt.”

~(William McFee)


Katja Winternitz

Managing Partner


I am Katja, and I have been living in Switzerland for several years.

My passion and expertise are in the areas of new technologies, finance, and engineering.

In the summer of 2023, I also completed my studies in business administration, with a focus on human resources.

My professional experience includes several years in a leading position in human resources and administration, where I gained valuable insights into corporate management and employee development.

Now, I am looking forward to combining my expertise and passion to help others reshape their career paths!

Consulting focuses:

  • Talent matching for skilled and executive staff
  • Specialist in technology and engineering
  • Human resources consulting & development

Motto: “You only know your limits once you have grown beyond them.”


Lisa-Maria Gerstgrasser

Managing Partner


Lisa-Maria Gerstgrasser is an expert in human resources and organizational development with many years of experience. Her professional journey spans a wide range of industries, including the paper industry, real estate, management consulting, hospitality and hotel industry, defense, aviation, marketing, and finance, to name a few.

Her extensive expertise also encompasses a variety of corporate structures, from startups to large corporations, and from service companies to mass production. Thanks to her versatile professional background, she has gained valuable insights and is familiar with a broad range of job profiles, whether in IT or engineering.

Due to her expertise and business knowledge, she precisely understands the factors that are crucial for companies in selecting new employees. Moreover, she is distinguished by her creative approach and her speed in finding the right talents for even the most demanding profiles.

Areas of expertise:

  • Talent acquisition of specialists and executives
  • Executive search
  • Specialized in technology profiles
  • Personnel development

Motto: “With unwavering will, one can even find the needle in a haystack.”


Mag. Hannes Maier

Managing Partner


Our ISG Managing Partner, Hannes Maier, holds a degree in International Economics from the Universities of Innsbruck and Siena. In 2004, he founded his own management consulting, coaching, and training company.

Hannes’s career journey includes roles as a marketing consultant, sales and marketing manager, and management consultant & trainer, all of which paved the way for his successful transition into self-employment.

He is a certified systemic management consultant with extensive additional training in recruiting, management assessment, coaching, communication, employer branding, and more.

As an expert and senior consultant, Hannes Maier specializes in executive search, recruiting, employer branding, HR marketing, change management, strategy consulting, and organizational development. His clientele spans internationally active companies across the DACH region, encompassing industries such as trade, commerce, public administration, and healthcare.



We strive for our continuous development and the ongoing improvement of our services to exceed your expectations!