Sijmon studied Civil Engineering at the then HTS. After experience “at sea” as a work planner simulating and calculating wave power and currents for ships, he went to work as an implementation consultant in construction with the firm Baan. This was followed by positions as project manager, team manager and general manager for Benelux, Israel and South Africa, finally embarking on the adventure of building Xibis in August 2011, first as business development manager and for the last three years as general manager. Outside of work, Sijmon enjoys his grandchildren, reading, hiking, road biking, gravel biking, nature, and commitment to the Kimon Foundation also has his heart. Sijmon is known as a true family man.