William L. Clark, a defense industry executive who spent much of his decades-long career with Rockwell International, died Jan. 30 at his home in Charlotte. He was 90.

The cause was congestive heart failure, said his daughter Amy Hitt.

Mr. Clark worked from the early 1950s until 1989 for Rockwell International and a predecessor company, North American Aviation. He served in positions that included vice president of the Washington and Eastern regional offices and vice president for procurement policies.

After his retirement, he taught for five years at the Defense Systems Management College at Fort Belvoir, Va.

William Loren Clark was born in Poplar Bluff, Mo. He was an Army veteran of World War II.

Mr. Clark was a 1949 graduate of Yale University and a 1952 graduate of Yale’s law school. He then joined the New York firm of Chadbourne and Park and later worked with Northern American Aviation in California before settling in the Washington area in 1969.

Mr. Clark served on the boards of the Washington Ballet, Arena Stage, the American Ballet Theatre and the YMCA of Metropolitan Washington. His memberships included the Metropolitan Club and the Georgetown Club.

He was a Bethesda resident before retiring to North Carolina in 2006.

His wife of 57 years, Alice Manley Clark, died in 2009. Survivors include four daughters, Madia Barber of Charlotte, Margaret Clark of Bethesda, Amy Hitt of Arlington and Ann Espuelas of Washington; a brother; and eight grandchildren.

— Emily Langer