When his friends came to find him by boat there was no sign of him.
His body was recovered on Sunday, 70m offshore.
Paul Galbraith, project manager for the Habitat for Humanity Christchurch Rebuild, said Mr He was a "great guy to have on the team".
"He was a pretty loyal sort of person, he enjoyed life, followed instructions very, very well.
Mr Gailbraith said Mr He used his background in IT to make valuable suggestions around getting more people involved in the project.
"He really enjoyed his time."
Mr He had spent two weeks in Auckland and had stayed with close friends.
He was planning to do the Milford Track this week and travel more of the country before heading home.
Mr He's family would travel to Christchurch for a memorial service on Friday.