After retiring as a player, St. Croix became a coach. He served as an assistant coach for the Winnipeg Jets for the 1987-88 and 1988-89 seasons. He was later named goaltending coach for the Dallas Stars where he won the Stanley Cup with the team in 1999. He is currently the assistant coach for the Manitoba Moose AHL hockey club, a job he has held since 2008.
Jeez, people - there's a big difference between being a goalie - including one who's played in Toronto - and being an effective coach. The ability to break down someone else's technique and offer constructive direction, the ability to put into words something you've done instinctively, and to be a guide and mentor are not enormously common among pro athletes, any more than they are common among the general population.
You want someone who's a good evaluator, teacher and motivator. It's a nice bonus if they've also "been there and done that" themselves, but it's hardly the primary requirement.
Cujo seems like a slight marketing ploy. I don't personally think he's the best person for the job because IMO you have to be a technical goalie in this league nowadays, and Cujo wasn't that (Yes there are exceptions but a) not the type of goalies we have b) changing styles doesn't seem productive).