Jay Merlino began his coaching career at the University of Delaware as an assistant strength coach. Following that, he was an assistant strength coach with the Philadelphia Eagles National Football League (NFL) team for eight seasons. Merlino also opened his own private training company to work with athletes while transitioning towards training tactical athletes such as local police officers and firefighters. This work led to a contracted strength coach position in the US Army Special Operations Command (USASOC) Tactical Human Optimization, Rapid, Rehabilitation, and Reconditioning (THOR3) program to train military soldiers. Merlino currently is a human performance training manager for athletes in their tactical elite division.