A. Wendell Carriker, 81, a certified health physicist who retired from the U.S. Department of Transportation’s Office of Hazardous Materials Transportation, died Dec. 25 at Sunrise at Mount Vernon, an assisted living home in Alexandria. He had cardiovascular disease.

His wife, Marlene Carriker, confirmed the death.

Mr. Carriker worked from 1978 until retirement in 2000 at the DOT, where he helped develop training materials and guidelines for first-on-scene responders to emergencies involving radioactive materials.

He began his federal career in 1954 at the Naval Research Lab in Washington, where he became head of the radioisotopes and reactor section of the health physics staff.

From 1960 to 1965, he worked on research and development projects at American Machine and Foundry in Alexandria. He then spent 12 years on engineering development projects at the Naval Oceanographic Office.

Alvin Wendell Carriker was a native of Harvard, Neb. He was born with a rare eye condition and had been legally blind since the 1970s.

He was a 1953 physics graduate of Nebraska Wesleyan University and, in 1959, received a master’s degree in physics from Vanderbilt University in Nashville.

He was a charter member of the Health Physics Society and helped organize the Baltimore-Washington chapter. He was a past president of the local organization.

He was an Alexandria resident and had been living at Sunrise since 2011. He was a member of Aldersgate United Methodist Church in Alexandria, where he volunteered for blood drives and was a past member of the men’s group.

He was a member of the Mount Vernon Genealogical Society and traced his family history to 1687.

Survivors include his wife of 58 years, Marlene Fallbeck Carriker of Alexandria; four children, Gordon Carriker of Ozark, Mo., Roger Carriker of Jessup, and Judith Jurkowski and Bradley Carriker, both of Alexandria; a brother; seven grandchildren; and two great-granddaughters.

— Adam Bernstein