Retired Air Force Col. Robert Sayles Brundage, 65, a veteran of World War II and a former vice president of the C.E.R. Geonuclear Corp. in Las Vegas, died Jan. 1 at a hospital in Carson City, Nev., after a heart attack.

Col. Brundage, who was born in Western Spring, Ill., grew up in Washington. He graduated from the old Central High School and American University. He later earned a degree in physics at the University of Texas.

He enlisted in the old Army Air Corps in 1942, became a pilot and was shot down over Germany during World War II. He was a prisoner of war in Germany. After the war, he was stationed at Andrews Air Force Base until his retirement in 1965.

In 1966, Col. Brundage moved to Las Vegas and joined C.E.R. He retired a second time in 1979 and moved to Carson City.

He was a member of the American Nuclear Society.

His marriage to Marjorie S. Brundage ended in divorce.

Survivors include his wife, Lisa, of Carson City; three daughters by his first marriage, Stephanie Brundage of Miami, Jennifer Wagner of Greenbelt, and Kimberley Brown of Washington; two sons by his first marriage, Geoffrey, of Gaithersburg, and Gregory, of Las Vegas; a son by his second marriage, Christopher, of Carson City; two sisters, Mary Jeannette Patterson of Alexandria, and Susan Gross of New York City, and seven grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the American Heart Association.