Gendron's first coaching position was as assistant coach to Albie Brodeur for two seasons from 1979-1981at his alma mater, Berlin High School. In 1981 he accepted his first head coaching position at Bellows Free Academy, in St. Albans, Vermont. During his nine years at BFA, Gendron led the Bobwhites to four state championships and was twice named Vermont coach of the year. While at BFA he coached future NHL All-Star John LeClair, coached baseball and football, and taught history.
In the summer of 1993 the New Jersey Devils hired Gendron to serve as a technological specialist for the 1993–94 season. The following season, 1994–95, Gendron was promoted to assistant coach serving under head coach Jacques Lemaire and alongside fellow assistant coach Larry Robinson. That season the Devils would go on to defeat the Detroit Red Wings to capture the team's first Stanley Cup championship. For the 1996–97 season, Gendron was named assistant coach of the New Jersey Devils AHL affiliate Albany River Rats, a position he remained in until the 1999–00 season. During the 2000–01 and 2001–02 season Gendron served as a scout for the Devils. Gendron became head coach of the Albany River Rats for the 2002–03 season. He was replaced during the 2003–04 AHL season by Robbie Ftorek. During Gendron's tenure as a member of the New Jersey Devils organization the team won three Stanley Cup Championships1995, 2000, 2003 and finished runner-up in 2001. His name was engraved on the Stanley Cup in 1995 and 2000.
In July 2005 Gendron was hired by Don "Toot" Cahoon to serve as assistant coach for the University of Massachusetts men's hockey team, a position he held for six seasons. While at UMass, he helped the Minutemen reach the 2007 NCAA Division I Men's Ice Hockey Tournament where they eventually lost in the regional final to the University of Maine. That postseason appearance represented the first NCAA Division 1 tournament appearance for the Minutemen since the program rejoined Division 1 for the 1993–94 season.
Yale University
In 2011, Gendron was named associate head coach at Yale University, a position he would remain in for two seasons. In his second season as an associate head coach of the Bulldogs, Gendron helped guide the team to the first national championship in school history in 2013.
University of Maine (2013–present)
On May 17, 2013, Gendron was named the fifth head coach in the history of the University of Maine men's hockey.
International
Gendron served as an assistant coach for 1993, 2001, and 2002 World Junior Championships for Team USA and also has worked several U.S. Select 16 and 17 teams.
Author
Gendron's book Coaching Hockey Successfully, published in 2002, is used by USA Hockey as the advanced-level manual for its coaching education program.
Personal life
Gendron grew up in Berlin, New Hampshire and graduate from Berlin High School in 1975 and played on the state championship hockey team his senior year. Gendron attended New England College in Henniker, New Hampshire where he studied History and Secondary Education, played on the baseball team, and played defensemen and a three-year captain for the hockey team. He and his wife, Janet, have two daughters, Katelyn and Allison. Gendron is fluent in both French and English and speaks some Russian.
