A former goalkeeper at McDaniel College, Shaffer returned to the Centennial Conference after two seasons as Mercadante's offensive coordinator at Delaware Valley University. Shaffer served as OC and worked primarily with the goaltenders at Delaware Valley, where he aided in game preparation, practice design, and social media for the Aggies' fledgling program.

Shaffer has been a coach with Back 2 Basics Lacrosse LLC since 2016, teaching the fundamentals of the sport to a wide range of age groups and providing individual lessons and tutoring for goalies. He has also been a coach and camp counselor at Headstrong Lacrosse Foundation since 2014.

A former two-time all-state goalie at La Salle College High School, Shaffer graduated from McDaniel in 2016 with a bachelor's degree in exercise science and physical education and minors in sport coaching; athletic training; and performance, fitness, and conditioning. He is currently pursuing a master's degree in education at Delaware Valley.