Mark is a Nurse Practitioner with the Occupational Health Clinic. He has been a nurse since 1982, with experience in emergency, flight, and military nursing. Mark retired as a Colonel in the US Army Reserves with 34 years of service in various clinical, staff, and command positions during reserve and active duty, including mobilizations/deployments to support Operation Desert Shield/Desert Storm, Enduring Freedom and Iraqi Freedom. He has been certified as a Family Nurse Practitioner since 1997 and his professional interests include occupational and military medicine. Mark's memberships include the ANA/TNA, AANP, VFW, MOAA, Sigma Theta Tau, and Phi Mu Alpha, and he currently serves as a member of the Tennessee Board of Nursing.