Chilton W. McLaughlin Jr. 67, an engineer who served as a mobilization specialist to develop disaster plans for the Atomic Energy Commission during the 1950s, died Monday after a long illness at Suburban Hospital in Bethesda.

As a consulting engineer, Mr. McLaughlin also helped to rebuild sections of Pearl Harbor after the Japanese attack on the Naval base in Hawaii in 1941.

Born in Kansas City, Kan., Mr. McLaughlin graduated from the University of Oklahoma in 1933 with a degree in civil engineering.

He then was elected county surveyor for Wyandotte County, Kan., and served in that office until 1943, while also managing his own engineering firm.

In 1941, he took time off from his surveyor's job to join Sverdrup and Parcel, another firm of consulting engineers, to assist in rebuilding projects at Pearl Harbor.

In 1943, he joined the Navy's civil engineering corps. He later joined the War Assets Administration.

Leaving the Navy in 1949, Mr. McLaughlin went to work for Westinghouse Co. in California and supervised the reconstruction of a plant and designed a long-term maintenance program for the facility.

He was recalled to the Navy in 1950 and managed a support branch of the Naval Construction Battalion. He then worked as a manager of the Industrial Reserve Facilities in the Bureau of Yards and Docks for the Navy.

In 1953, he went to work for the AEC as an associate project engineer on classified projects and as a mobilization specialist developing and implementing disaster plans for the commission.

During 1957 and 1958, he was a supervisor with the Housing and Home Finance Agency. He was in charge of designing and developing emergency housing programs. He then rejoined the AEC as a project engineer, remaining in that position until 1970.

In 1969 he retired from the Navy Reserves and opened a real estate brokerage firm in Bethesda.

Mr. McLaughlin was a Mason for 25 years and member of the U.S. Navy Civil Engineer Corps Reserve Officers Association, American Nuclear Society, American Society of Civil Engineers, Izaak Walton League and Veterans of Foreign Wars.

He is survived by his wife, O. Lucille, of the home in Bethesda; a son, Chet, of Kansas City, Kan. two sisters, Janice Martin and Joann Melerhoff, both of Kansas City, Mo., and two grandchildren.