Retired Army Lt. Col. Andrew Joseph Sullivan, 47, whose last assignment was in the office of the chief of information of the Army Department at the Pentagon, died Wednesday at Commonwealth Doctors Hospital after a heart attack. He was stricken at his home in Fairfax.

With the information office from 1972, he was chief of the news branch at the time of his retirement in 1975 after 20 years of Army service.

Col. Sullivan then became associatel with the VSE Corporation, an Alexandria engineering firm, where he was contract administrator until his death.

He was born in Providence, R.I. He graduated from Providence College there in 1954. He later earned a master's degree in human relations from the University of Oklahoma.

He entered the Army in 1955. From 1959 to 1962, he was a recruiting officer for the states of Vermont and New Hampshire. He then was assigned to missile and artillery units in Korea and this country.

From 1966 to 1970, Col. Sullivan was press officer in Germany, where he served as president of the German American Press Club, and in Vietnam.

Returning to this country, he attended the Command and General Staff School at Fort Leavenworth and studied public relations at the University of Wisconsin before starting his last assignment at the Pentagon. u

Col. Sullivan's decorations included the Legion of Merit, the Bronze Star Medal with Oak Leaf Cluster, the Air Medal and the Meritorious Service Medal.

He was a member of the Association of the U.S. Army, the Army Navy Country Club, the American Legion, the Knights of Columbus, St. Leo's Catholic Church in Fairfax and the Rhode Island State Society. He was a past president of the Washington Area Alumni Club of Providence College.

He is survived by his wife, Clara B., a daughter, Kathleen A., and a son, Christopher A., of Fairfax; two other daughters, Joann M., of Falls Church, and Denise F. Myers, of San Diego; two brothers, Daniel L. of St. Louis, and Francis A., of Montvale, N.J., and a sister Patricia A. Brown, of Federal Way, Wash.