Geoff Halliwell took the plunge and claimed first prize at the inaugural St Luke’s Hospice Sheffield Splash.
The event at Ponds Forge raised money for the Room To Care appeal to create a new £5 million in-patient unit at the hospice on Little Common Lane in Whirlow.
Against stiff competition from fellow businesspeople around Sheffield, Geoff - an architect - was judged to have executed the best three dives.
The panel included Olympic diver Ben Swain, cliff diver Matt Cowan, and Sheffield International Venues boss Steve Brailey.
But hospice spokesman Ceri James said: “All the participants were winners as far as we’re concerned!”