Coach Corazzini, a graduate of St. Sebastian’s and Boston University, took over as head coach of the St. Mark's Boys' Varsity Hockey team in 2014.

While serving as captain at B.U., Carl was selected to the Hockey East First Team and named Second Team All-American. A career spanning over ten years, Carl has played in the AHL, for the Boston Bruins, and for the Chicago Blackhawks. He was previously the head hockey coach at Weston High School and the 495 Stars U-16 Hockey Club for 3 years.

In addition to his coaching, Carl is the Director of Wellness on campus and is a certified personal trainer. Carl is also very involved in fundraising and charity work particularly with the Special Olympics.

Coach Shortsleeve, a graduate of St. Sebastian's and Holy Cross, joined St. Mark's prior to the the 2018-19 season.

In high school, Shortsleeve played goalie for St. Seb's and for the U18 495 Stars. Shortsleeve continued his playing career at Holy Cross and majored in economics. After graduating in 2012, he joined Coach Corazzini as a goalie coach for Weston High School. He was with Weston from 2012-2018, including one year as head coach in 2017-18, before rejoining Coach Corazzini at SM.

In Shortsleeve's seven years at SM, the team has seen seven goalies advance to the next level. During this time, goalies have gone on to play in the QMJHL, NAHL, Williams College, Trinity College, Colby College, and Castleton University. Shortsleeve also works for Stop It Goaltending, including the annual GCG Camp.