Kirwan said he hopes that his and Jean's accomplishments will inspire others to get involved in hockey, whether it's as players, coaches or management.
"I think it's most important for kids," he said, "If kids think it's not possible or achievable, [winning the Cup] gives them an opportunity to say, 'You know, I can do it, this guy has done it.' Maybe it carves a path for others who don't think it's possible to be inspired and try to accomplish similar kinds of goals."
Kirwan and Jean were among three Black coaches in the NHL last season. The other was former NHL forward Mike Grier for the New Jersey Devils.
There have been at least nine Black assistant coaches in the NHL, including former goalies Grant Fuhr and Fred Brathwaite, former defenseman Paul Jerrard and former forwards Graeme Townshend and Dirk Graham.
A Black coach hasn't led an NHL team since Graham became the first and guided the Chicago Blackhawks for 52 games in 1998-99. The NHL Coaches' Association has embarked on efforts to increase diversity and inclusion behind the bench.
For Kirwan and Jean, winning the Stanley Cup brought back memories of how their coaching careers began.
Kirwan is one of few remaining Lightning employees from the team's inaugural season in 1992-93. He was working in the sales department when then-coach Terry Crisp asked him in 1996 to become the team's video coach.
"I was working in the front office one day, then I was in the locker room the next and I had no idea what I was doing," Kirwan said. "I knew hockey, but I knew nothing about video, what I needed to do, what the job entailed.