Seamus Johnston

Seamus Johnston joined the Harvard men's lacrosse coaching staff in June of 2025, taking over as the Director of Lacrosse Operations for the program. 

In his role, Johnston serves as the general manager for the program, ensuring that student-athletes have the most compelling and engaging athletic and academic experience possible. He oversees travel, nutrition and equipment needs while also leading the student-manager program for the Crimson lacrosse team. 

A former standout on the lacrosse field, Johnston played five seasons of college lacrosse with Trinity (2020-2024) and Salisbury (2025) at the competitive Division III level. The Duxbury, Massachusetts native was a two-time captain for the Bantams lacrosse program, helping the team earn 26 victories in his four seasons. After graduating from Trinity with a major in political science, Johnston moved over to DIII powerhouse, Salisbury University, for a graduate season. The defender started every game and helped lead the Sea Gulls to a 20-1 record while earning All-CLC Second Team honors. Johnston graduated from Salisbury in May with a Master's degree in communications with a concentration in athletics. 

While in college, Johnston held a general management internship with the Hartford Wolfpack of the American Hockey League (AHL) an affiliate of the National Hockey League's New York Rangers in the Summer of 2023. In this role, Johnston shadowed the organization's general manager and assisted with a number of duties that involved all aspects of team operations. Johnston also served as an intern for the Plymouth County District Attorney's Office during the Summer of 2022.