The Queenstown man will join Treble Cone from NZSki, where
he is general manager of
snowsports and responsible for the management of 400 staff.
He will take over the position from Jackie van der Voort, who left the role in February to take a seat on the ski area board.
Mr Arnott said he was "thrilled'' to join Treble Cone as it celebrates its 50th winter season.
"I'm excited about working with the Treble Cone board to bring a fresh approach to an already vibrant business"