Mr Beeche said he was grateful for the way local government agencies had got on board.
"The course we've come up with is logistically really challenging, but it has been incredible how all the agencies seem to be working together and the answer to everything is 'Yes, let's work out how' rather than 'We can't do that'," he said.
The central city bus network will be one of the services most affected by the event, but Mr Beeche said Auckland Transport had been accommodating.
"We presented our proposed course to Auckland Transport and they came back to us three weeks later with a 40-page plan of how they were going to reroute their entire bus network through the central city for us."
The Auckland Council subsidiary Auckland Tourism Events and Economic Development has contributed $1.1 million to the two events, which Auckland Mayor Len Brown believes lines up with the city's major events strategy.
Mr Brown hopes hosting the triathlon events will help attract other high-profile sporting events to the city.
"As well as direct economic benefit, we will be profiling Auckland to the world and hosting a significant number of international visitors, while also giving our residents the chance to enjoy two free, world class festivals," he said.