Army Lt. Col. Clarke M. Gillespie Jr., 43, who was assigned to the directorate of intergovernmental affairs in the office of the assistant secretary of defense for manpower, Reserve affairs and logistics, was killed June 29 in a traffic accident at Dulles International Airport.

A spokesman for the Federal Aviation Police at Dulles said the accident occurred shortly before midnight near the Dulles Marriott Hotel when the car Col. Gillespie was driving collided head-one with another vehicle. The spokesman said Col. Gillespie was eastbound in the westbound lane of the Dulles Access Road.

Col. Gillespie, who was born in Alabama, graduated from Auburn University in 1962 with a degree in electrical engineering, He was commissioned in the Army through the Reserve Officers Training Program. He earned a master's degree at the Naval Postgraduate School at Monterrey, Calif., in 1968 and graduated from the Command and General Staff School at Fort Leavenworth, Kan., in 1974.

In addition to assignments at various posts in this country, he served in Germany, Vietnam and Korea. He had been assigned to the directorate of intergovernmental affairs since 1979.

Col. Gillespie, who lived in Falls Church, was a football referee for the Skyline Unit of the Virginia High School League. He was a member of the Annandale Methodist Church.

Survivors include his wife, Lydia, of Falls Church; three children, Clarke M. III, Lisa and Laurie, all of Falls Church; his father, Clarke M. Sr., of Birmingham, Ala.; a sister, Margaret Jo Whitfield, also of Birmingham, and a brother, Stanley, of Los Angeles.