Guerin is in his first season as GM of the Minnesota Wild, replacing Paul Fenton on Aug. 21 after working the previous eight seasons in the front office of the Pittsburgh Penguins, first as a player development coach (2011-14) then as assistant GM (2014-19).
Before shifting into management, Guerin played 18 seasons in the NHL, including his first seven with the New Jersey Devils when Lamoriello was their GM. Lamoriello selected Guerin, a forward who had 856 points (429 goals, 427 assists) in 1,263 games, with the No. 5 pick in the 1989 NHL Draft and traded him to the Edmonton Oilers on Jan. 4, 1998.
In between, they won the Stanley Cup together in 1995.
"I learned so many things from Lou and from Jacques Lemaire (who coached New Jersey from 1993-98), because they're like a team those two," Guerin said during a video call arranged by the NHL on Friday. "But when you played for the Devils and you were playing for Lou, you learn how important the team aspect is, how important the discipline is and how important the sacrifice is, and that no one person, no one player is bigger than the team.
"He just holds true to that even today. He's never wavered from that."
Dubas, who started as a player agent before becoming GM of Sault Ste. Marie of the Ontario Hockey League (2011-14), worked under Lamoriello as assistant GM of the Toronto Maple Leafs for three seasons before being promoted to replace him on May 11, 2018.
"I think especially in the last season, the amount that I learned from Lou was incredible," said Dubas, who was also on the video call. "Not even just how to operate the team and how to run a sports franchise, but how to treat people, the importance of your family along the way, the importance that he put on me to make sure that I was taking care of that aspect of my life and pushing me to always make sure that our people are always doing the same thing."