Tonne started his career at an IT & Services company where he worked as a Network Manager and Programmer Analyst for 5 years. After that he worked until 2013 at PwC where he held different positions within PwC Netherlands and Australia. During that 18 year period at PwC he specialised in as well the organisational as the technical aspects of Information Security. Currently he is the Corporate Information Security Officer at Vopak responsible for IT and OT security including the Vopak IT Control Framework.