A paramedic was on the scene to assess and treat the man, before he was airlifted to Mackay Base Hospital on Queensland's east coast at about 8.30pm (11.30pm NZT).
"Every solid effort was made to save that man's life", O'Connell said.
"But his injuries and the reaction to those injuries were so severe that, unfortunately, he has not survived, (not) long after his arrival at Mackay Base Hospital".
Police said Tuesday that they have not publicly identified the man as they were still working to contact his next of kin.
Both swimmers were pulled from the water by French tourists on another boat, who were the first to respond to the incident.
SHARK experts have described the three attacks in the Whitsunday's as completely out of the ordinary for the underwater predator.
Sea World's director of marine sciences Trevor Long said our three most risky sharks all had different feeding patterns but there were similarities in the way they hunted their prey.
"They all have different feeding strategies, however all of those sharks like and enjoy to take things on the surface because when it attacks it prey has now here to go whereas when it's in the water it has 360 degrees to escape".
"Obviously, it's a really unfortunate situation and given the two previous bites a few weeks back, it's bringing a lot of focus on the area", he said. The shark bite left her bleeding profusely and needing emergency surgery, Seven News reported.
They were temporarily put in place after the first two attacks but won't be again, the state government says.
Four tiger sharks were culled from the waters following the attacks and drum lines, which are unmanned aquatic traps used to lure and capture sharks with baited hooks, were additionally laid out by the Queensland state government.
Professor Colin Buxton from the University of Tasmania told Australian magazine StabMag: "The pros are that drum lines kill sharks and thus reduce the number of sharks in an area and this reduces the statistical chance of a shark encounter with humans".
Minister for Agricultural Industry Development and Fisheries Mark Furner said the meeting, which will be held on Friday, would enable local industry representatives and officials to sit down directly with experts.