Charles P. Maloney Sr., 88, a civil engineer and founder of the Maloney Concrete Co. in Chevy Chase, died Saturday of pneumonia at the Bethesda Retirement and Nursing Center in Chevy Chase.

Mr. Maloney, who was born and reared in Washington, began working for his father, a road builder in Washington and Virginia. He founded Maloney Concrete in 1928, and was chairman of the board when he retired about 1965.

In 1964, he was one of five Catholic laymen from around the country selected as a trustee of Catholic University and the National Shrine of the Immaculate Conception.

The following year, the title of Knight Commander of the Order of St. Gregory the Great was conferred upon Mr. Maloney. His wife of 62 years, the former Rose Eleanor Mann, also was honored by the pope with the Pro Ecclesia et Pontifice Medal. Mrs. Maloney died in 1977.

Mr. Maloney was a member of the John Carroll Society, the St. Vincent dePaul Society and the Washington Council of the Knights of Columbus. He was a member of the boards of the Catholic Youth Organization and Merrick Boy's Camp and was a longtime member of the Church of the Annunciation in Washington.

Survivors include eight children, Ellen M. Parker and Joseph P., both of Washington; Mary Elizabeth Greeves and John T., both of Bethesda; Charles P. Jr. and Ann T. Murray, both of Chevy Chase; Gertrude C. Viner of Potomac, and Francis X., of Plantation, Fla.; two sisters, Jane F., of Hyattsville, and Sister M. Denyse, C.S.C., of Kensington, 39 grandchildren and 21 great-grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the Little Sisters of the Poor.