Ed Williams, a multi sport athlete growing up in New Jersey, is currently the Yale Men's Lacrosse Associate Head Coach. Williams, who served as interim head coach at Lafayette College in 2018, began his Yale coaching career in 2019. He was promoted to defensive coordinator in the summer of 2019 by Head Coach Andy Shay after helping the Bulldogs reach the NCAA Championship Game and finishing No. 2 in the nation.

Williams spent five years at Lafayette serving as defensive, recruiting, and travel coordinator for five seasons before serving as head coach in 2018. He helped the Leopards man down defense rank among the top 15 in the nation three times, while USILA Scholar All-American Erik Cannon earned second-team All-Patriot League in 2015.

In 2018, Scott McAvoy received the Patriot League Outstanding Leadership and Character Award, and Lafayette was second in the league with 27 recipients on the academic honor roll.

Williams also made a stop at the University of Scranton for two seasons as an assistant coach and recruiting coordinator.

A standout player at Lycoming College (Pa.), he graduated in 2010 with a Bachelor of Arts degree in criminal justice. Williams was a four-year starter at midfield for the Warriors, earning first-team All-Middle Atlantic Conference honors in 2009 and second team recognition in 2010. Williams finished his career with 97 goals and 40 assists for 137 total points.