Stephenson has been very active within the sport, having served on the NCAA Men’s Lacrosse Rules Committee for three years (2008-11) and on the USILA Rankings Committee (2006-11). He also serves NCAA Men’s Lacrosse All-America Committee and on the NCAA Regional Advisory Committee. He is also an America East Conference Lacrosse Coaches Representative.

He guided the team to four wins in 2017. He coached Will Puduski to a spot on the America East All-Conference Second-Team, becoming the first UMass Lowell player in school history to earn the America East All-Conference distinction.

Stephenson's career coaching record stands at 50-115 in 12 seasons as an NCAA Head Coach, which includes a 9-37 overall record in three seasons with the River Hawks.

In 2016, he led the River Hawks to a four-win season with victories against Jacksonville, Wagner, Dartmouth and NJIT. In two years as a Div. I team at UMass Lowell, he owns a 5-25 overall record.

In his first season and the program's first in Division I, Stephenson helped lead the River Hawks to the program's first victory at NJIT on March 7. Under his leadership, freshmen attackmen Cory Highfield and Sean Tyrrell were rewarded for their strong seasons with spots on the America East All-Rookie Team.

He was named the fifth head coach in program history on July 27, 2013.

Stephenson spent the two years as the associate head coach at the University of Maryland Baltimore County preceded by 10 years as head coach at Binghamton University, six at UMBC as an assistant and three years at his alma mater Towson University. He recorded a 41-78 record in nine seasons at the helm of the Bearcats program.

UMass Lowell’s men’s lacrosse team will be the second program Stephenson will build from its grassroots. In 2001, he started the program at Binghamton University and enjoyed success within his first three years.