Mark Christiani serves as the East Coast Human Performance Integration (HPI) Manager for O2X Human Performance, where he supports, develops, and mentors On-Site Specialists across multiple contracts and locations. In this role, Mark helps integrate comprehensive human performance programs focused on strength and conditioning, injury prevention, recovery, and long-term readiness for tactical and industrial populations. He works closely with both leadership teams and embedded specialists to ensure programs are operationally effective, sustainable, and aligned with client mission requirements.

Prior to stepping into his current leadership role, Mark worked as an On-Site Human Performance Specialist supporting the United States Army Reserve 81st Readiness Division, where he delivered strength and conditioning support designed to improve Soldier readiness, physical performance, and resilience while reducing injury risk. Before joining O2X, Mark served as the Brigade Lead Strength and Conditioning Coach for the U.S. Army’s Holistic Health and Fitness (H2F) Program with the 44th Medical Brigade at Fort Bragg, where he led the development and implementation of large-scale performance initiatives across multiple battalions and installations. During his time in the H2F program, he helped build Brigade-level strength and conditioning systems, oversaw new soldier performance initiatives, supported the distribution and integration of wearable technology, and contributed to data collection and performance analysis efforts. Earlier in his career, Mark worked in collegiate strength and conditioning at Savannah State University and the University of South Carolina, primarily supporting football and track and field athletes. His introduction to tactical strength and conditioning began during his time serving in the U.S. Army with 1st Battalion, 75th Ranger Regiment while preparing for Ranger School.

Mark brings more than a decade of experience in tactical and collegiate human performance and remains passionate about continuous growth as both a coach and leader. He earned his Master of Science in Sports Medicine from Georgia Southern University and his Bachelor of Science in Kinesiology and Health from Iowa State University. Mark is a Certified Strength and Conditioning Specialist (CSCS) and Registered Strength and Conditioning Coach (RSCC) through the National Strength and Conditioning Association. Outside of work, he enjoys competing in and coaching powerlifting, spending time at the beach, and continuing to refine his cooking skills.