8:48 PM ET

According to sources, the Boston Bruins are going to name Jim Montgomery as their new head coach.

Montgomery's contract as an assistant coach with the St. Louis Blues is set to end on Friday, the same day the appointment is expected to be made.

Bruce Cassidy was fired by the Bruins on June 7 after six seasons as the head coach. Cassidy is the new head coach of the Golden Knights.

Montgomery has an NHL head-coaching job. He was hired by Dallas in May of last year and immediately took the Stars back to the playoffs. Montgomery's time in Dallas was brief.

He was fired by the Stars for "unprofessional conduct incompatible with the core values and beliefs of the Dallas Stars and the National Hockey League." Jim Nill said there was a "material act of unprofessionalism" that led to Montgomery's dismissal.

Montgomery said on January 3, 2020, that he was checking into a rehabilitation center for alcohol abuse.

Montgomery was hired by the Blues to be an assistant coach. Montgomery was mainly involved in special teams, helping St. Louis to rank second overall on the power play and 10th on the penalty kill.

From 1993 to 2003 Montgomery played in 122 NHL games for the Blues, Montreal, Philadelphia, San Jose, and Stars. He had 9 goals and 34 points.

Montgomery made a number of successful coaching stops before rejoining the NHL ranks.

He was the head coach of the United States Hockey League's Dubuque Fighting Saints from 2010 to '13 and they won two league titles.

Montgomery was the head coach at the University of Denver when they won a national championship. The national coach of the year was awarded to Montgomery.

The Boston Bruins lost to the Carolina Hurricanes in the first round of the playoffs. The Original Six's franchise history has 29 coaches.