Previously, Seidner was global medical director for Travelers Insurance, where he was responsible for medical policy development, quality assurance and improvement, and worksite health promotion. Prior to joining Travelers, he was the owner and chief health advisor at Medical Meetinghouse. Seidner earned a Doctor of Medicine degree from SUNY Health Science Center, a Master's degree in Public Health from the University of Connecticut and an A.B. in Anthropology from Hamilton College. He is board certified by the American Board of Family Practice and the Board of Preventive Medicine: Occupational and Environmental Medicine.