Kees-Jan Mes (45) started his career at  the  Royal Dutch Navy. He worked in several  positions at sea after being trained at the Royal Netherland Navy Academy and at the University of Twente. Later he also worked for the Dutch Ministry of Defence. In 1997 he left the Navy as lieutanant commander in the position of maintenance manager helicopters and started to work for Imtech Maintenance.  Four years later he moved to Imtech Marine & Offshore. Mes became  managing director of Imtech Marine & Offshore BV in 2008, after having worked in various positions, including  senior management positions in the UK and Germany, in which countries he and his family lived for six-and-a-half years.

Early 2012 Mes founded his own company: Mes Marine Management Services.