he was named the 10th head coach in Siena Lacrosse history on June 26, 2018.

Despite the 2020 season being shortened, Siena collected a pair of non-conference wins over LIU and NJIT, both coming at home. The Saints finished the season fifth in the nation in caused turnovers per-game (10.33) and saves per-game (14.83).

Just a year into his tenure, the Saints went 6-7 overall in his first season in 2019, and saw four players from the Green and Gold earn All-MAAC honors. Prior to his appointment to head coach, Gleason spent seven seasons as the associate head coach at perennial national power UAlbany.
“I’m extremely honored for the opportunity to return to Siena College and head the men’s lacrosse program,” said Gleason, who previously served as an assistant coach for the Saints under Brian Brecht from 2008-10. “I’d like to thank Vice President and Director of Athletics John D’Argenio, Associate Director of Athletics Lori Anctil, and the entire search committee for choosing me to be the next head coach. Additionally, I’d like to thank UAlbany Head Coach Scott Marr and Director of Athletics Mark Benson for my fantastic experience over the past few years which helped prepare me to take on this new role. I’m excited for the opportunity to build Siena back into a MAAC Championship contender, and I look forward to rekindling the relationships I previously made with our loyal alumni base.”

In 10 prior seasons in the Division I coaching ranks at both Siena and UAlbany, Gleason’s teams have made seven NCAA Tournament appearances, won six conference tournament championships, and captured eight regular season titles. Overall, his squads have posted a combined 123-52 (.703) record including a 56-7 (.889) mark in conference action.

“We are excited to welcome Liam back to Siena,” remarked D’Argenio upon Gleason's appointment. “It was very evident when he was here previously that he possessed the makeup to be a successful head coach. He comes from an outstanding program at UAlbany where he was part of the team’s national success, while also being an accomplished recruiter in the geographic areas where Siena has been successful in the past.”

UAlbany earned berths to the NCAA Tournament in each of Gleason’s final six seasons with the program, punctuated by the school’s first-ever trip to Championship Weekend this spring.