Coaches
Margaretha Ehret
Coach Gretta- Founder
Margaretha Ehret (Coach Gretta) is a Philadelphia native who grew up playing field hockey and lacrosse at the William Penn Charter School. She then went on to be an All-Ivy Field Hockey player and captain of the team at the University of Pennsylvania. She comes from a family of athletes and fitness fanatics, with both of her parents and her sister playing collegiate sports.
Gretta is passionate about motivating and mentoring young people, and helping them reach their goals and perform at their peak. She has spent the last 10 years teaching kindergarten, first, and second grade in North and West Philadelphia. She became the head field hockey and lacrosse coach at Merion Mercy Academy in 2016 and has since led the Golden Bears to one state-championship appearance (2016), a district championship appearance (2018), and a district championship (2016). Gretta also spent a year in 2021 as an assistant coach on staff for The University of Pennsylvania field hockey team. Currently, Gretta is a teacher at the William Penn Charter School where she also coaches the Varsity field hockey team as well as many other sports. Coach Gretta is also actively involved with coaching outside of school at Mainline Mayhem Field Hockey Club.
Health and fitness is at the core of Coach Gretta’s philosophy. Although she no longer competes in games, you can find Coach Gretta jumping into drills at practices and camps, crushing it at her favorite fitness studios.
Emilee Ehret
Coach Emilee- Co-Founder
Emilee Ehret, younger sister to Coach Gretta, followed her sister’s footsteps growing up playing field hockey and lacrosse at Mount Saint Joseph’s Academy. Emilee was a high school All-State and All-American field hockey and lacrosse player for the Magic and went on to play field hockey for The Pennsylvania State University. She started as a defender for the top ten program and was a part of two Big Ten Championships and four runs in the NCAA tournament.
Emilee spent the past two years living in Chicago where she taught Kindergarten through the Teach For America program. She has maintained her passion for sports since graduating college by being the head coach and site coordinator for Girls On The Run after school program as well as coaching for Windy City Hockey Club. Now residing in Philadelphia, she is a certified spin instruction and is the new head coach for Springside Chestnut Hill Academy. She is also a coach at Mainline Mayhem Field Hockey Club.
Nicole Gerdes
Coach Nicole
Nicole grew up in Robbinsville NJ where she was a captain of both the field hockey and lacrosse teams. She was awarded the Female Athlete of the Year award for the class of 2011. Nicole continued her field hockey career at Saint Joseph’s University and served as a captain for the team. At Saint Joseph's, Nicole majored in Elementary and Special Education and continued on to receive her Masters as a Reading Specialist, graduating in 2016. She currently works as a Special Education teacher in Philadelphia and is an assistant coach for the Merion Mercy Academy’s Golden Bears. She is also a coach for the Mainline Mayhem field hockey club and continues to pursue her passion in field hockey and fitness.