"He was transported to Taupo Hospital, but he died later that afternoon."
Mr Jeurissen said police were working to determine the circumstances leading up to the accident.
"At this stage, it appears that the man was speed-skiing behind a boat when he became injured and got into difficulties."
The organisers stopped the event after the accident. Witnesses have since been interviewed as part of the investigation.
Mr Van Deursen died just a few months after his daughter Olivia broke her neck in a similar accident.
The 34-year-old, who holds numerous national waterski racing titles, recovered but will reportedly give up waterski racing.
Waterski racers travel faster than waterskiers, averaging about 150km/h, and wear helmets, goggles and a harness for safety.
Mr Van Deursen is survived by his wife and five children, the youngest aged 4.
- staff reporter