Thomas Lawrence McKevitt Sr., 88, a lawyer who retired from the Department of Justice as a section chief of the land and natural resource division, died of pneumonia June 21 at his home in Silver Spring.

Mr. McKevitt retired from the Department of Justice in 1981 after 46 years of federal service, including World War II service in the Pacific in the Navy Judge Advocate General Corps. In 1971, he received the John Marshall Award for Outstanding Legal Achievement.

He was born in Ironwood, Mich., and graduated from Notre Dame University and Notre Dame Law School, where he was editor of the law review.

Mr. McKevitt was a 50-year member of St. Bernadette's Catholic Church in Silver Spring and a former president of the St. Vincent de Paul Society.

He did volunteer work with Meals on Wheels. His avocations included history, poetry and exploring Civil War battlefields.

Survivors include his wife of 59 years, Dorothy Dugan McKevitt of Silver Spring; five children, Tom McKevitt of Boulder, Colo., John McKevitt of Stony Creek, Conn., Brian McKevitt of Ashton, Mark McKevitt of Ellicott City and Shiela Hanson of Silver Spring; two brothers; and 10 grandchildren. A son, Kevin, died in infancy.