William L. Bransford, a managing partner of a Washington law firm and general counsel of the Senior Executives Association, died Sept. 27 at Georgetown University Hospital. He was 66.

The cause was thyroid cancer, said his son, Kevin Bransford.

Mr. Bransford, a Washington resident, in 1983 co-founded the firm now known as Shaw, Bransford and Roth. Since 2000, he had been general counsel for the Senior Executives Association, which represents thousands of government executives. He specialized in labor and employment law and was a regular columnist for the publication Federal Times.

He was an adjunct professor at George Washington University and a lecturer on federal employment law. He co-wrote the guidebook “The Rights and Responsibilities of Your Federal Employment” in 2000.

Early in his career, Mr. Bransford was a lawyer with the public defender’s office in Lake County, Ohio, and a lawyer in the chief counsel’s office of the Internal Revenue Service.

William Lee Bransford was a native of Bethesda and a 1964 graduate of Albert Einstein High School in Kensington. He was a 1968 political science graduate of the University of Maryland and a 1975 graduate of Cleveland State University law school. He received a master of laws degree, with a specialty in labor law, from Georgetown University in 1983. He was an Army veteran of the Vietnam War.

Mr. Bransford served on the board of the Federal Employee Education and Assistance Fund and was general counsel for several professional associations.

Survivors include his wife of 43 years, Kathleen Kelly Bransford of Washington; three children, Michael Bransford of Chicago, Kevin Bransford of Kingston, Pa., and Mary Kate Bransford of Washington; a sister; and five grandchildren.

— Megan McDonough