John E. Till

Branch	United States Navy; United States Naval Reserve;
Years of service	1967–1999
Rank	Rear admiral (O‑8)
Commands	Commanded seven Selected Reserve units; Commander, Region 10, Naval Reserve Readiness Command; Deputy commander, Submarine Force U.S. Atlantic Fleet; Deputy commander, United States Strategic Command;
Awards	Officers' Submarine Warfare Insignia; Defense Distinguished Service Medal; Legion of Merit; Meritorious Service Medal (2); Navy Commendation Medal (2); Navy Achievement Medal;

John Earl Till
PhD; RADM, USNR, Ret.
John Earl Till PhD; RADM, USNR, Ret.
Born	January 26, 1945; Orangeburg, South Carolina
Education	United States Naval Academy (BS, 1967); Colorado State University (MS, 1972); Georgia Institute of Technology (PhD, 1976);
Known for	Radiological risk assessment and environmental analysis
Awards	Health Physics Society Elda E Anderson Award; [E.O. Lawrence Award]; L.S. Taylor Medal; Health Physics Society's Distinguished Scientific Achievement Award
	Scientific career
Fields	Nuclear science
Thesis	The Toxicity of Uranium and Plutonium to the Developing Embryos of Fish (1976)
Doctoral advisor	Geoffrey G. Eichholz, Ph.D.
Other academic advisors	Bernd Kahn, Ph.D.; Karl Z. Morgan, Ph.D.; C.J. Roberts, Ph.D.
Branch
Branch	United States Navy; United States Naval Reserve;
Years of service	1967–1999
Rank	Rear admiral (O‑8)
Commands	Commanded seven Selected Reserve units; Commander, Region 10, Naval Reserve Readiness Command; Deputy commander, Submarine Force U.S. Atlantic Fleet; Deputy commander, United States Strategic Command;
Awards	Officers' Submarine Warfare Insignia; Defense Distinguished Service Medal; Legion of Merit; Meritorious Service Medal (2); Navy Commendation Medal (2); Navy Achievement Medal;

John E. Till is an American nuclear scientist who is known for his research on the risk of exposure to radioactive materials released to the environment from nuclear facilities and is a Doctor of Philosophy (PhD) in nuclear engineering. Till also served as a commissioned officer in the United States Navy, both on active duty and in the United States Naval Reserve, retiring from the Reserve as rear admiral (a two-star flag officer). Till is also the president of Risk Assessment Corporation and Embeford Farm of SC, LLC.