SI 100 Europe - 2017, Dutch -

Annemarie Muntz is president of the World Employment Confederation, representing labour-market enablers in 50 countries and seven of the largest international workforce solutions companies. She also chairs its European counterpart, WEC-Europe. She is an influential lobbyist at the global level and at the European Union, representing the interests of the employment and recruitment industry at large. In addition to her roles at WEC, Muntz is managing director of group public affairs for Randstad Holding. She also sits on the board of CSR Europe, a European network for sustainable businesses.

SI 100 Europe - 2019, Dutch -

Hans Ploos van Amstel joined The Adecco Group as CFO and a member of its executive committee in 2015. Before joining The Adecco Group, he was CFO of Cofra Group from 2009 to 2013, before acting as co-CEO of C&A Europe for a transition period until 2015. He started his career in finance at Procter & Gamble in the Netherlands in 1989. Between 1992 and 2003, he held positions of increasing responsibility in Procter & Gamble across Saudi Arabia, Germany, Belgium and Switzerland. In 2003, he joined Levi Strauss & Co. in Belgium as VP of finance and operation Europe, and moved to the US as global CFO in 2005.

SI 100 Europe - 2021, Dutch -

As managing director, J.H. “Jurriën” Koops is responsible for the daily management of ABU. He entered staffing in 1999 as a senior consultant in business development at the Start employment agency. He’s been with ABU since 2002 and has been managing director since 2014. He is a member of several boards, including the Foundation for Training and Development in the Flexible Staffing Industry (Doorzaam), VNO-NCW (the national employers’ organisation in the Netherlands) and UWV Werkbedrijf, which offers employers information and facilities to find personnel and helps job seekers to find work.

Staffing 100 Europe | 2021

SI 100 Europe - 2014, Dutch -

Annemarie Muntz is president of Ciett, the International Confederation of Private Employment Services, and Eurociett, the European Confederation of Private Employment Agencies. She is an influential lobbyist in the European Union, helping to create a legal environment in which private employment agencies are able to prove their important role in a functioning labour market; she has been tireless in her work on the Agency Work Directive.

SI 100 Europe - 2015, Dutch -

Ron Icke is chairman of the supervisory boards of German staffing firm Orizon GmbH and Dutch staffing firm DPA; positions he has held since 2011 and 2010, respectively. In 1995 he joined Goudsmit (part of USG People) as CFO, being promoted to CEO in 2005. In 2006 he was appointed CEO and chairman of the board of USG People, a position he held until 2009. Icke qualified as a chartered accountant at PwC before becoming CFO of investment company WolterSchaberg, where he developed his expertise in both acquisitions and temporary staffing.

SI 100 Europe - 2018, Dutch -

Dinette Koolhaas is Kelly Services’ VP and managing director EMEA. She is also a board member for Kelly’s joint venture with Persol in Asia Pacific and a board member of the World Employment Confederation. Fluent in English, German, Dutch and French, Koolhaas first worked at a logistics consultancy agency in Holland. In 1997, she began her career in staffing with USG People, leading brands Secretary Plus and Unique. She then joined Kelly Services in 2008 as VP and regional general manager for Western Europe. Koolhaas was promoted to VP operations for EMEA in 2013 and to her current role in 2017. She has an MBA from the Business School Netherlands.

SI 100 Europe - 2015, Dutch -

Wessel van Alphen Sr. is the founder and CEO of IT-Staffing, one of the largest IT specialist staffing firms in the European market and the fifth largest staffing firm in the Netherlands. Van Alphen started his first company in 1978 providing the services of self-employed IT specialists to clients. In December 2013, van Alphen Sr. passed the day-to-day running of the business to his son, Wessel van Alphen Jr., who is director of De Staffing Groep, the parent company of IT-Staffing.

SI 100 Europe - 2014, Dutch -

Hans Leentjes has been president, Northern Europe and executive VP at ManpowerGroup since 2011. When he joined ManpowerGroup as manager of the Netherlands in 2005, he brought 15 years of employment services experience gained at Randstad. In 2008, he successfully finalized the acquisition of Vitae, a specialty engineering and finance firm with revenues in excess of €74 million.

SI 100 Europe - 2017, Dutch -

Based in Switzerland, Dinette Koolhaas serves as VP and operations leader, EMEA, for Kelly Services. Koolhaas is also a board member for Kelly’s joint venture, TS Kelly Asia Pacific. Koolhaas joined Kelly Services in 2008 as VP and regional general manager for Western Europe, where she led eight country general managers to deliver on regional and country-specific growth strategies. She was promoted to VP and operations leader for EMEA in 2013. Koolhaas started her career as a consultant at a logistic consultancy agency in Holland before moving to USG People, with whom she remained for more than 12 years. She holds an MBA and is a board member of the World Employment Confederation.