ISG Netherlands
Van Weerden Poelmanweg 196
NL-3768MN Soestduinen


… your competent partner in all HR matters!

Our consultants support you throughout the Netherlands. 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 and personnel consulting.


Meet the team behind Netherlands

Annerose Witzler

Executive Managing Partner

International Service Group
Location: BENELUX
Clos de la Sucrerie 3
7760 Escanaffles – Belgium


Mrs Witzler shows long-term and solid knowledge of the international medical devices- and healthcare market in general. Mrs Witzler holds a professional bachelor in hotel management.

She looks back on a 20+ years professional career and could develop a high level of dedicated experience in sectors like: medical devices, plastics and chemistry – where she successfully covered the various management roles.

Especially in medical devices, Mrs Witzler gained  further in-depth knowledge in arthroscopy, laparoscopy, general surgery, gynaecology, vascular surgery, spine surgery and interventional pain management.

Over 15 years, Mrs Witzler has held national roles for Smith & Nephew in Germany and later also EMEA-wide, mainly in functional areas like: sales, marketing, business development, market access and professional education.

In 2006 she moved to Belgium and worked for Kimberly Clark/Halyard Health in the field of distributor management within EMEA.

Since March 2019 Mrs Witzler joined ISG as Executive Managing Partner and signs responsible for the ISG Benelux team. She is fluent in German, English, Dutch and French.


Millicent Ndlovu

Managing Partner

International Service Group
NL- Amsterdam



  • University of Liberec – Master of science
  • Durban University of Technology – Business Administration


  • Executive search and selection
  • Medical device manufacturing – procurement and supplier development
  • Automotive manufacturing – research and development, quality assurance
  • Textile manufacturing – quality assurance


  • Global with focal point in BENELUX


  • Executive search and selection
  • Interim management solutions
  • Outplacement


  • English (Native)
  • Dutch (Communication)

Marlene Gigase

Managing Partner

International Service Group
Van Weerden Poelmanweg 196
NL-3768MN Soestduinen


Background and Professional Experience

Mrs.Gigase has an extensive network and excellent market knowledge of the Healthcare Market in the Benelux. As a Senior Director she brings to ISG more than 30 years of experience and demonstrated results in successfully and sustainable growing businesses in Healthcare. With her background in the Pharma, Medical Devices and Healthcare IT sector in various Sales, Marketing and Management positions, she understands the challenges companies are facing in the rapid developing environment. She is highly involved in innovative digital developments, AI, Personalized Medicine, Interoperability and eHealth.

She has a genuine desire to make a difference in patient’s lives by working together with customers and partners to obtain a win, win, win outcome. With her special interest in the added value for human health and well-being, she also supports “Positieve Gezondheid”, where a meaningful life is one of the key elements of being happy.

In her vision, our working environment is one of the important factors in life and a healthy career is a real asset for the company as well as for the individual. Her aim at ISG is to find the excellent match for both parties. She brings a range of assessment techniques and uses NLP elements to supports search assignments.

Country Focus

Netherlands, Belgium, Luxembourg

Industry Focus

Healthcare, Healthcare IT, Pharma, Medical Devices, Life Sciences, Biotechnology

Academic and Regional Hospitals, Network Organizations, Insurance Companies

Functional Coverage

C-Suite & Board Level | Board of Directors Care providers | Healthcare professionals | Health Care IT Management | Commercial Marketing & Sales | Business Development | Medical- & Bio-Informatics | Health Economics & Market Access | Pricing & Reimbursement | Regulatory Affairs | Quality Management & Safety | Scientific Research | Preclinical & Clinical Development

Personal specialism are:

  • Search & Selection
  • Talent Development
  • Interoperability
  • Strategic M&S organizational advice


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