Judith Keyserling, 66, who owned and operated a marketing consultancy in Washington, died Feb. 11 at her home in Beaufort, S.C.

She had tissue cancer, said her brother, Billy Keyserling.

Ms. Keyserling, who had been a District resident since the late 1960s, served as a marketing executive for the Vietnam Veterans Memorial Fund and the Washington Ballet Company before opening her firm several years ago. Her corporate clients included Target, Harley-Davidson, the Container Store, Gucci and Verizon.

Judith Keyserling was born in New York. She was a 1967 economics graduate of Sweet Briar College. She received a master’s degree in education from the University of Massachusetts.

After teaching in public schools in Silver Spring, she received a master’s degree in business from George Washington University and focused on marketing.

She was an adjunct professor of marketing at American University and the University of South Carolina.

Survivors include two brothers and a sister.

— T. Rees Shapiro