Mike Walsh, Varsity Head Coach

Mike Walsh is the Head Coach of the Summit High School Girls’ Lacrosse team and has held that role since the 2012 season. Under his leadership, the team has won eight Union County titles, three State Group II titles, four State Group III titles and the 2016 & 2022 Tournament of Champions title.  Prior to taking the head job at Summit, he assisted a Mendham team for three years that also won a State Group III title.  He started his coaching career at West Morris Central High School in 1995 and, in eight years, amassed a 138-23-2 record that included six straight Morris County titles and an appearance in the state semi-finals five out of six years.

During his time as a Summit coach, Mike has coached 26 All Americans, numerous All State performers and the NJ Player of the Year twice.  He was named NJ Coach of the Year in 2000 and again in 2013 by the Star Ledger.  He also received recognition from the NJSIAA in 2000 for his contributions to girls’ lacrosse.

 In addition to his coaching at the high school level, Mike has worked extensively at the club lacrosse level and has been a Board member of the Summit Lacrosse Club since 2005. A resident of Summit, Mike has coached kindergarten through eighth grade for the club and continues coaching today.

 In 2017, he was inducted into the New Jersey Lacrosse Hall of Fame.

Mary Kate Renehan, Varsity Assistant Coach

Mary Kate Renehan, a graduate of Summit High School, is the Assistant Coach for the Summit High School Girls’ Lacrosse team. She has held this role since 2019.

During her time at Summit High School, Renehan was a four-year member of the varsity lacrosse team and held the school record for ground balls. She was also the team captain her senior year, earned All-Iron Hills Conference and All-Union County honors, named the 2008 team MVP, and earned the 2009 Joanne Lavorgna lacrosse award. Renehan also played field hockey where she received all-state, all-conference, and all-county honors and served as team captain her senior year. Renehan was a recipient of Summit High School's Iron Hills Conference Scholar Athlete.

In 2009 Mary Kate was recruited to play at Hobart and William Smith Colleges in Geneva, New York and started all 15 games her freshmen year. Unfortunately Renehan was injured during Fall Ball of her sophomore year and could no longer play. She stayed on to assist and coach the team. After graduating Renehan coached at Kent Place School as the Assistant Varsity Lacrosse Coach before joining the staff at Summit High School.

Mary Kate now works as a first grade teacher at South Mountain Elementary School in Millburn. She is married to Jesse Mancuso, who also played lacrosse at Hobart College. They welcomed their first child, Tate, in 2022, and he is the team’s biggest cheerleader.  

Brian Erickson, Junior Varsity Coach

Brian Erickson has served as a member of the Summit High School Girls Lacrosse program since 2021.  He brings with him three and half decades of public high school teaching and coaching experience, the last 17 years as a Physical Education teacher at Summit High School. His coaching experience in high school ranges from freshman level to head coach.  Since 2015 he has served as the assistant coach for the Kean University Women's Basketball program, helping with skill development, practice planning and recruiting.