Allan Grover Eckstein, 49, a program director with the Defense Audit Agency and a resident of McLean since 1971, died of cancer Monday at Arlington Hospital.

Mr. Eckstein was born in Des Moines, Iowa, and reared in Oakland, Calif. He earned a bachelor's degree in accounting at San Francisco State University and a master's degree in public administration at the University of Oklahoma. He was a certified public accountant.

He served in the Marine Corps during the Korean conflict. He joined the Army Audit Agency in the mid-1950s, and worked for them in Europe from 1960 to 1964. He joined the Defense Audit Agency in 1965 and worked in Taiwan before moving to McLean in 1971.

Mr. Eckstein was a 32nd degree Mason, a Shriner, and member of the Scottish Rite.

He attended Lewinsville Presbyterian Church in McLean.

Survivors include his wife, Sara Mae, and two sons, Howard and Robert, all of McLean; his mother, Fern Potter, three half-sisters, Connie Murata, Billie Lander, and Joanne Potter, and a half-brother, Steven Potter, all of California.

The family suggests that expressions of sympathy be in the form of contributions to a memorial fund that has been established in Mr. Eckstein's name at Lewinsville Presbyterian Church, McLean, Va.