Robert S. Walleigh, 84, who worked for the old National Bureau of Standards for more than 35 years before retiring in 1979 as a senior adviser for international affairs, died of pulmonary fibrosis July 24 at Manor Care Nursing Home in Chevy Chase. He lived in Bethesda.

Mr. Walleigh, an electrical engineer, joined the Bureau of Standards in 1943. He rose through the ranks, becoming an associate director and then acting deputy director for administration before serving in his last assignment in 1979.

After retiring from the government, he was a consultant to the Institute of Electrical and Electronics Engineers until retiring altogether in 1997.

He was the recipient of numerous government awards, including the Commerce Department's Gold Medal and its Exceptional Service Award. He also was the recipient of an award from the Navy and an alumni award from George Washington University.

Mr. Walleigh, a Washington native, was a graduate of Western High School and George Washington University. He was a test engineer with General Electric from 1936 to 1938, then an administrative aide with the Public Works Administration until joining the Bureau of Standards.

He was a member of Concord-St. Andrew's Methodist Church in Bethesda, the Fossils and the IEEE.

Survivors include his wife, Catherine, of Bethesda; two daughters, Margaret Shaffer of Kensington and Catherine Carnevale of Rockville; a brother, Leslie, of Bethesda; and four grandchildren.