Known as a physical, hard-nosed defenseman, Marchment had 182 points (40 goals, 142 assists) and 2,307 penalty minutes in 926 NHL games with the Winnipeg Jets, Chicago Blackhawks, Hartford Whalers, Edmonton Oilers, Tampa Bay Lightning, San Jose Sharks, Colorado Avalanche, Toronto Maple Leafs and Calgary Flames.
"The National Hockey League mourns the passing of San Jose Sharks scout and former NHL player Bryan Marchment," the NHL said in a statement. "Our deepest condolences go out to his family, the Sharks organization and Bryan's many friends, former teammates and fans."
Marchment retired in 2006 and joined the Sharks front office in August 2007, working with the scouting and player development departments.
His son, Mason Marchment, is a forward with the Florida Panthers.
"It's a very difficult day for our staff," said Mike Grier, who was named Sharks general manager Tuesday. "Those guys, you scout, you spend a lot of time together on the road and in meetings, so it was very emotional day, very hard on the group.
"It's a sad day for me personally, very sad day for our organization, our players, our staff. Anyone who knew Bryan knew what type of man he was. He was just an honest, down to earth, loving person who just cared about everyone. He had time for everyone in the building, anyone he came across, he had time.
"He was great to me my first few years in Edmonton, treated me with respect right away and made me feel at home and if I ever needed anything whether it was a dinner, a home-cooked dinner, instead of eating out every day, he and (wife) Kim would have me over. It's a very difficult day."