Another former Robins coach, Willie Poching, has also been appointed as an assistant, ahead of the Four Nations this autumn.
The two appointments are for the duration of the tournament, at the end of which the NZRL will conduct a review.
“Justin brings great experience holding a head coaching position in Super League and being involved with the Storm and Warriors,” said Kidwell.
“Both of these guys are great people who will compliment my coaching style.”
Poching will work with the forwards, while Morgan is set to coach the Kiwi backs.