Mark Christiani serves as the East Coast Human Performance Integration (HPI) Manager for O2X Human Performance, where he supports and develops On-Site Specialists across multiple locations while helping integrate strength and conditioning, injury prevention, and holistic human performance programs for tactical and industrial organizations.

Prior to this 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 aimed at improving Soldier readiness and reducing injury risk. Before joining O2X, he served as a Brigade Lead Strength and Conditioning Coach at Fort Bragg and held collegiate strength and conditioning positions at Savannah State University and University of South Carolina.

Mark is an Army veteran with over a decade of experience in tactical strength and conditioning. He holds a Master of Science in Sports Medicine from Georgia Southern University and is a Certified Strength and Conditioning Specialist (CSCS) through the National Strength and Conditioning Association.