Mike Sullivan, head coach of the NHL's Pittsburgh Penguins, it set to lead the U.S. Men's National Team as head coach at the 2025 4 Nations Face-Off. 

The Marshfield, Mass., native has served on the staff for multiple national teams, including as an assistant coach for the 2006 U.S. Olympic Men’s Ice Hockey Team. In addition, he was the head coach of the 2007 U.S. Men’s National Team and was an assistant coach for the 2008 and 2017 U.S. Men’s National Team. He also served Team USA as an advance scout for the 2015 U.S. National Junior Team.

As a player, Sullivan represented Team USA on two occasions—once as a member of the 1988 U.S. National Junior Team and also as a member of the 1997 U.S. Men’s National Team.

Sullivan is in his 10th season as head coach of the Pittsburgh Penguins. He took over as head coach on December 12, 2015, and led the club to back-to-back Stanley Cup championships (2016, 2017) in his first two seasons. He is the only American-Born head coach to win the Stanley Cup multiple times. Under Sullivan's leadership, the Penguins have earned berths to the Stanley Cup Playoffs seven times in his first nine seasons. 

Previously, Sullivan spent two seasons as head coach of the National Hockey League’s Boston Bruins (2003-04, 2005-06) and led the team to the Northeast Division crown his first season guiding the club. He has also had stints as an NHL assistant coach for the Tampa Bay Lightning (2007-09), New York Rangers (2009-13), Vancouver Canucks (2013-14) and Chicago Blackhawks (2014-15.)

Sullivan, who has been a speaker at multiple USA Hockey coaching clinics, began his professional coaching career in 2002 with the Boston Bruin’s American Hockey League affiliate, the Providence Bruins. During his lone season with Providence, he led the team to first place in its division.

Professionally, Sullivan spent parts of 11 seasons with the NHL’s Boston Bruins, Calgary Flames, Phoenix Coyotes and San Jose Sharks. The New York Rangers' 69th overall selection in the 1987 NHL Entry Draft played 709 NHL games in his career. He played collegiate hockey at Boston University (1986-90), and was named captain for his senior season.