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After graduating from Eindhoven University of Technology (TUe), his career started as a Process Engineer Research & Development at ODME BV (Optical Disc Manufacturing Equipment) in Eindhoven. In this function, he combines R&D work with supporting foreign customers on site (Taiwan, USA and Germany) with working with ODME machines. In 1995, he moved to Stork Screens BV and worked there for several years as Project Leader/Manager Research & Development. In this function, he was responsible for, among other things, the process developments regarding electroplating, heat treatment and thin layer technology. 

In 2000 Roger Theunissen founds RTC&P Consultancy & Projectmanagement BV/CeConEx, an independent engineering company in the field of precision cleaning and contamination issues. CeConEx now has extensive experience in advising and innovating in the field of surface and material technology.

Areas of expertise are:

  • Precision cleaning (plasma, wetchemical, ultrasonic cleaning, electrochemical cleaning, supercritical carbon dioxide cleaning, dryice carbon oxide cleaning)
  • Contamination control
  • Vacuum process technology
  • Coating Technology (PVD, CVD, thin layer, galvanic)
  • Electrochemistry

In addition to its consultancy activities, CeConEx is also known for its courses and network meetings on precision cleaning and contamination issues. CeConEx has over 22 years of experience and more than 240 (inter)national customers.