Cornelis is a hydrologist specialising in hydrology, flood risk management and flood forecasting. His career started in the Netherlands working with Royal HaskoningDHV. After 4 years of working in the Netherlands his ingenuity and professionalism in his field received the attention of colleagues internationally. He was offered a position within Royal HaskoningDHV Australia and moved in 2019.

Mark has over 20 years of experience in the water industry, with a focus on hydraulic modelling, non-revenue water and pipeline asset management. He held several roles with Thames Water and Yorkshire Water in the UK before relocating to Malaysia in 2007 to join Ranhill Water Services as Network Modelling Manager.