Leadership Team

Robin van Poelje

Director, Chairman and CEO


Mr. van Poelje has been with CSI since January 2014 when CSI acquired TSS. From January 2010 to now, Mr. van Poelje has been the Chief Executive Officer of TSS, based in the Netherlands. Mr. van Poelje holds a BSc. in Economics from the University of Groningen, the Netherlands and is a post graduate in Marketing and Strategy from École Supérieure de Commerce de Montpellier, France.


Daan Dijkhuizen

Group CEO Topicus Operating Group


Mr. Dijkhuizen has been at Topicus since 2013. Prior to joining Topicus, he was a technology executive at the ING Group - a multinational banking and financial services corporation. Since December 2017 to present, Mr. Dijkhuizen has served as Chief Executive Officer of Topicus. He holds a MSc. in Industrial Engineering & Management from the University of Twente, the Netherlands.


Han Knooren

Group CEO Total Specific Solutions Public


Mr. Knooren (1968) graduated as an information technology engineer, studied Business Administration at the Nyenrode Business University and followed the Advanced Management Program at INSEAD. He has worked in multinational, private equity owned and start-up Vertical Market Software companies and lived in the UK, France, the USA and the Netherlands. Within TSS Mr. Knooren is responsible for the companies in the public sector in the Netherlands, as well as France, Spain, Italy and the other Southern European countries.


Ramon Zanders

Group CEO Total Specific Solutions Blue


Mr. Zanders joined TSS in 2011, as Group CEO he is responsible for the companies in the private sector in the Netherlands and all companies in the regions DACH, Nordics, and Eastern Europe. Before TSS, Mr. Zanders fulfilled managerial roles where he was overall responsible for businesses in software consulting and outsourcing in the Netherlands, USA, and Thailand.