The man who died at the Hidden Valley Festival was a member of the New Zealand Army who "served New Zealand with pride".
He was Second Lieutenant Tuitu'u Junior Vaiangina, 29.
Vaiangina joined the Army in 2015 and was most recently based at Linton Military Camp.
"He served New Zealand with pride and will be sorely missed by his colleagues and all who knew him," Chief of Army Major General John Boswell said.
The army extended its sympathies to Vaiangina's family and friends, Boswell said.