Preston Janifer, 87, an employe of the old Navy powder factory and then the Naval Ordnance Station at Indian Head, Md., for 30 years, died of an aneurysm Wednesday at La Plata Hospital in La Plata, Md.

Mr. Janifer retired from the naval facility in 1955. Since then, he had worked his farm at Ironsides in Charles County, Md.

A member of Mount Hope Baptist Church in Ironsides, he had served the church as deacon, treasurer and Sunday school superintendent - positions he held for 41 years until he retired in 1974. He also was head of Gethsemane Lodge, a church organization, treasurer of a Sunday school union, and treasurer of the Potomac River Baptist Association.

Mr. Janifer was born in Nanjemoy, Md. He served in the Army in World War I, and then lived briefly in Pennsylvania. He moved to Ironsides in 1925.

His first wife, the former Sally Durham, died in the early 1950s. Following his retirement from the government, he married the former Ethel B. Faulkner, who lives at the home.

Mr. Janifer brought up 14 foster children and two stepchildren.

Among his survivors are a step-daughter, Geraldine Daye, of Indian Head; a stepson, Clarence Wimbush, an airman stationed at Andrews Air Force Base; five foster children, Sandra, Michelle and Lillian Janifer, all of the home, and Michelle and Stephanie Hinton, both of Washington.