Gerard J. Engert, 92, who served with the Federal Bureau of Investigation for 28 years before retiring in 1958 as agent supervisor of its fingerprint section, died Sept. 2 at Holy Cross Hospital after a heart attack. He lived in Silver Spring.

Mr. Engert, a New Orleans native who attended Chaminade College in Missouri, began his FBI career in 1930 as a student fingerprint classifier. He rose through the ranks, becoming an FBI special agent in 1938.

After leaving the bureau, he spent 20 years lecturing and consulting on fingerprint identification procedures.

He joined the International Association for Identification in 1942 and had chaired its fingerprints subcommittee of its science and practice committee.

Mr. Engert was an original historical committee member of the Society of Former Special Agents of the FBI and had served as secretary and treasurer of the society's Washington chapter.

In retirement, he had helped celebrate the birthdays of children on his block. A 1995 Washington Post story told of his placing "happy birthday" signs in youths' yards at night and rewarding them with a present the following day.

Survivors include his wife of 67 years, Marie Louise Engert of Silver Spring; two daughters, Mary E. Gallagher of Frederick, Md., and Geraldine A. Mack of Silver Spring; 12 grandchildren; and 27 great-grandchildren.