Darin Bowland and Jason Ikiadis will join Kim Tanner - who has been a captain for the cruise line for five years.
Bowland will take the helm of Spirt of Discovery on 27 June on its voyage around the British Isles and Tanner will take Spirit of Adventure on her inaugural 15-night domestic cruise on 26 July.
Bowland has previously held positions with Royal Caribbean and Carnival Corporation after starting his career as a cadet with the Royal Canadian Navy in 1985.