In addition to former Scotland scrum-half and British and Irish Lion Blair, Rennie has appointed former New Zealand captain Tana Umaga as defence coach, while Jason Ryan will continue as forwards coach and Neil Barnes will be senior assistant coach.
Phil Healey, who has also worked with Rennie at Warriors and in Japan, is the new head of performance, while Tamati Ellison will be Maori All Blacks head coach.
Rennie said he has recruited a group who each have vast proven experience and are world-class in their specialist fields.
“This is a very experienced and highly skilled coaching team,” Rennie said. “Each of these men has a track record of getting the best out of the players.”
Blair and Healey will complete the current Japan Rugby League One season before moving to New Zealand.
“Mike will bring his innovative approach and attention to detail to our attack,” Rennie added.