Islanders general manager Garth Snow will not be the only prominent alumnus of Mount Saint Charles Academy of Woonsocket, Rhode Island, at Barclays Center Tuesday night for Game 3 of the Lightning-Islanders series.

Also in the house: NBCSN analyst Brian Boucher, who at 39 is seven years younger than Snow but is a fellow goaltender — and a former counselor at Snow’s goalie school one long-ago summer in Foxborough, Massachusetts.

“I got paid, but I think I got paid minimum wage,” Boucher said with a laugh during the Lightning’s morning skate. “He took advantage of me.”

Boucher was 18 then, and Snow was playing for the Flyers — the team that in 1995 drafted Boucher.

Boucher said that when he still was in high school alumni would come home on Christmas break and practice with the team, including Snow, who played at the University of Maine.

“I always thought that was neat to have guys who were playing Division I hockey practice with your high school team,” Boucher said. “He was a guy I looked up to, coming from that area, seeing him play Division I and seeing him drafted.”

As a Flyer in 2010, Boucher outdueled Henrik Lundqvist in a last-day-of-the-season shootout that prevented the Rangers from reaching the playoffs for the one time in Lundqvist’s 11 NHL seasons.

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“Who was termed ‘The Perfect Human?’ [Nicklas] Lidstrom?” Boucher said. “[Lundqvist] might be the perfect goalie. Here I am a guy who doesn’t have quite the credentials that Henrik Lundqvist has. To be able to do that was pretty neat. It was a magical year, obviously, to go to the Stanley Cup Final [where the Flyers lost to the Blackhawks].”

What does Boucher think of the Islanders’ Thomas Greiss so far?

“I think he’s looked good,” Boucher said. “He doesn’t seem to be overwhelmed by the moment . . . I like his calm demeanor in the net. I think he has a quiet athleticism to his game. He has strong legs. But most impressive is he hasn’t been overwhelmed by the bright lights. That to me is impressive, and it’s huge for the Islanders.”