After college, he worked five years for Bethlehem Steel Co. in Sparrows Point, Md. Mr. Moseley joined Day & Zimmermann in 1941 as a special assistant to engineering and construction managers on various steel industry projects, the beginning of an association that would span four decades.
During World War II, Mr. Moseley spent three years in the Navy. After the war, he returned to Day & Zimmermann and a succession of managerial jobs.
In 1947, he was named manager of the company's New York office. Four years later, he became assistant general manager of Day & Zimmermann's Lone Star Ordnance Division in Texarkana, Texas, a diversified ammunition-loading complex that the company operates for the Army. "We operate this plant and basically load artillery ammunition for the U.S. government," said Harold Yoh, president of Day & Zimmermann. "We take all of the components and put them all together in the final shell."
During the Korean War, he directed Day & Zimmermann's defense work with the Army.
He returned to Philadelphia in 1953 and was named assistant to the president in 1955. He was made a director and corporate vice president in charge of sales, electric-line construction and plant operations in 1957.
In 1966, as Day & Zimmermann increased its operations at the Lone Star facility during the Vietnam War, Mr. Moseley was named president of Day & Zimmermann's Plant Operations Division. He moved his office to the 15,000-acre Lone Star plant.
Ten years later, Mr. Moseley returned to Philadelphia when he was elected chairman of the board of Day & Zimmermann. He retired in 1980.
"He was a very respected leader and a fine gentleman," said Yoh, who knew Mr. Moseley for nearly 30 years. He said Mr. Moseley was able to rise in the company, a professional services firm that employs 12,000 people nationwide and has its headquarters on Market Street in Center City, "mainly because of his intuition and his thoughtfulness and the respect that everyone in the company had for him."
An excellent sportsman, Mr. Moseley often unwound from job pressures on the golf course and, at his best, shot in the 80s. "He was a very competitive golfer," Yoh said. "He really enjoyed it."
While living in Texarkana, Mr. Moseley was a director of the State First National Bank of Texarkana and the Texarkana Country Club. He was on the board of the Salvation Army and was a two-term vestryman at St. James Episcopal Church.
More recently, he was a vestryman at St. Martin in the Fields Episcopal Church in Philadelphia, where he was accounting warden for six years. He was a founding director of the Wissahickon Skating Club in Philadelphia.
Mr. Moseley was a member and director of the Philadelphia Cricket Club and the Sunnybrook Golf Club, the Racquet Club, the Philadelphia Club, the Union League of New York, the Williams Club of New York and the Texarkana Country Club.
He was a member of the American Defense Preparedness Association, the American Management Association, the National Management Association and the Society of American Military Engineers.
Mr. Moseley is survived by his wife, Anne Downs Moseley; a daughter, Mary Moseley Schwartz; a son, William R. Jr.; five grandchildren; one sister, and one brother.
Services will be at 6 p.m. today at St. Martin in the Fields Church, 8000 St. Martins Lane in Chestnut Hill. In lieu of flowers, contributions may be
sent to St. Martin in the Fields Church.