Joseph Sheffield is an O2X On-Site Human Performance Specialist specializing in Strength & Conditioning with the 147th Air Support Operations Squadron. In this role, he brings over a decade of experience coaching tactical populations to enhance performance, readiness, and resilience. He specializes in designing and implementing strength and conditioning programs tailored to the unique demands of tactical athletes.

Prior to joining O2X, Joseph served as the Lead Strength & Conditioning Coach for the U.S. Army’s Holistic Health and Fitness (H2F) Program with the 16th Military Police Brigade at Fort Liberty, where he oversaw coaching staff across multiple locations. In this role, he worked closely with military leadership to improve soldier lethality and readiness while also delivering combative-based instruction to enhance physical restraint and control capabilities. He previously served with the 18th Field Artillery Brigade, collaborating with unit fitness leaders, educating service members on exercise science principles, and developing individualized programming, including for postpartum and pregnant service members.

Earlier in his career, Joseph was the Head Strength & Conditioning Coach for All-Marine Corps Sports and the All-Marine Wrestling Team and an instructor for the USMC High-Intensity Tactical Training (HITT) Program. He notably trained and coached a Marine who went on to compete for Team USA at the 2020 Olympics in Tokyo. Joseph holds a Bachelor of Science in Sports and Exercise Science from the University of North Carolina–Greensboro and a Master of Science in Exercise Physiology from the University of Texas–El Paso.