University, Mason established the Lasers as one the top programs in the region over his six seasons at the helm.

"I am thrilled to welcome Bill Mason to our community and am grateful for the work done by Senior Woman Administrator Alice Wiercinki and our search committee," said Ashmead White Director of Athletics Tim Ryan. "Bill's passion for supporting the development of members of his program, being highly engaged within a campus community himself and encouraging the same of his players, along with his drive for competitive excellence was apparent during our search process. I look forward to working with him in the years ahead."

"I am so thankful to Tim Ryan, Alice Wiercinski, and the search committee for this dream opportunity," said Mason. "I look forward to serving the men's lacrosse program with unparalleled passion, with a commitment to developing the men of Bowdoin lacrosse."

In six years at Lasell, Mason guided the program to unprecedented success, including an overall record of 61-23 (.726), two Great Northeast Athletic Conference championships (2017, '21) and two NCAA Division III Tournament appearances. His teams have dominated GNAC play over the last half-decade, racking up a 36-3 mark in conference play, and 47 of his athletes have earned GNAC post-season honors, including the program's first USILA All-American in 2019.

Prior to his arrival to Lasell, Mason spent three years as an assistant coach at Bates College. With the Bobcats, Mason served as the assistant coach and defensive coordinator and helped lead Bates to its first winning season in over eight years, as well as the program's first NCAA tournament appearance and victory. Mason also coordinated all aspects of recruiting with the Bobcats, and assisted with team travel, daily practice planning, and team community service outreach.

Before Bates, Mason returned to his alma mater, Western New England University, where he served as the offensive assistant and recruiting coordinator. Mason helped guide the 2012 squad to an undefeated conference season, a No. 15 rank in Division III, and an NCAA Tournament bid. While at WNEU, Mason was a three-year member of the Golden Bears men's lacrosse program, and won a Commonwealth Coast Conference championship during his first year in 2009.

Mason earned his Bachelor's Degree in Communications from Western New England in 2012 and owns a Master's Degree in Athletic Administration from Lasell. A native of Southborough, Massachusetts, Mason and his wife Alex have a son, Wes.