Greg Souders is a jiu-jitsu black belt under David Jacobs who worked extensively with Lloyd Irvin and is the founder of Standard Jiu-Jitsu, one of the top no-gi jiu-jitsu/submission wrestling gyms in the sport. Souders is known for his novel approach to grappling based on the Ecological branch of psychology, also known as Ecological Dynamics, a methodology he used to develop highly successful athletes such as Deandre Corbe, Gavin Corbe, and Alex Nguyen.