Graveline entered the United States Air Force Medical Service after graduation from medical college. Following internship he attended the primary course in Aviation Medicine, Class 56C, at Randolph Air Force Base and was assigned to Kelly Air Force Base as Chief of the Aviation Medicine Service. Graveline was granted the aeronautical rating of flight surgeon in February 1957. From September 1957 to June 1958, he attended Johns Hopkins School of Hygiene and Public Health, where he received his master's degree in Public Health. He then attended the Aerospace Medical residency at the Air Force School of Aerospace Medicine, completing his residency training in July 1960 at Brooks Air Force Base and receiving his specialty certification by the American Board in Preventative Medicine. At that time he was assigned to the Aerospace Medical Research Laboratory as research scientist with special interest in prolonged weightlessness deconditioning and countermeasures. In July 1962, he returned to Brooks Air Force Base where he continued his research, served as intelligence analyst for Soviet bioastronautics and was active as a NASA flight controller for the Mercury and Gemini missions. Graveline authored ten professional publications and reports on biological deconditioning and weightlessness countermeasures. His research involved bed rest and water immersion to study deconditioning. While in the USAF he did the original research on both the extremity tourniquet and the prototype lower body negative pressure device for use in prolonged zero gravity missions. NASA's operational lower body negative pressure device has seen use in the Soviet MIR, as well as on the shuttle and station research. His 2004 research on space medicine was studying the effect of galactic "heavies" in the brains of mice, using iron ions and NASA's linear accelerator at Brookhaven, NY. In June 1965, Graveline was selected with NASA's first group of scientist astronauts and assigned to Williams Air Force Base for jet pilot training. He resigned on August 18, 1965, prior to flying in space. He was the first astronaut to resign prior to being assigned a mission. Although this was ascribed to "personal reasons," it was later disclosed in Deke Slayton's memoir that Graveline resigned due to his impending divorce. According to Slayton, "The program didn't need a scandal. A messy divorce meant a quick ticket back to wherever you came from." His wife Carol had stated in the court papers that her husband had "violent and ungovernable outbursts of temper." Upon his resignation Graveline stayed with NASA for three months as a doctor in Houston before returning to civilian life. Graveline practiced medicine as a family doctor in Burlington, Vermont, during which time he also served as a flight surgeon for the Vermont Army National Guard. Upon his retirement at age sixty, Graveline became a writer of medical and science fiction thrillers with 15 novels to his credit. Graveline married a total of six times. Following his experience with cholesterol drug side effects, Graveline became a critic of the use of statins to treat high cholesterol levels. While on Lipitor, Graveline developed transient global amnesia and could not recognize his family. He slowly recovered after stopping this medication. NASA physicians then prescribed half the dose, but the amnesia returned. Graveline was a contributor to the book NASA's Scientist-Astronauts by David Shayler and Colin Burgess.
