Kyle Casillas has been the lead strength and conditioning coach at Sanford Sports Performance in Grand Forks since 2021. Prior to joining Sanford Sports, Casillas gained valuable coaching experience in various roles. He worked with the University of Hawaii football program and coached independently at various performance facilities in Hawaii and North Dakota. Most recently he was a coach on Future, a personal training fitness app. From the youth level to the professional level, Casillas has worked with a wide range of the population throughout his career, including professional athletes in the NFL and NHL.

Casillas served eight and a half years in the United States Marine Corps as an infantryman in a light armored reconnaissance battalion. He completed three deployments in Iraq and Afghanistan. Casillas also spent three years as a combat instructor, specializing in tactics, weapon employment and physical training.