Rok is one of the co-founders of Cosylab, the world leader in big physics control systems and cancer therapy software. His career started after graduation from Physics as a control system developer, followed by being a project manager and group leader. Gradually, he moved more and more into business and sales. He was the account manager for the ITER project for 13 years and was also responsible for Cosylab’s scientific North American business. He is currently the company's Deputy Chief Operations Officer and accountable for its fusion business development