Obituaries of residents from the District, Maryland and Northern Virginia.

Paul Stack, 
Foreign Service officer

Paul Stack, 88, who worked for the Foreign Service from 1954 to 1991, predominantly as a political officer based in Japan, died March 3 at a hospital in Rockville, Md. The cause was a heart attack, said a son, Kevin Stack.

Mr. Stack, a resident of Darnestown, Md., was born in Washington. He was a member of Our Lady of the Visitation Catholic Church in Darnestown, where he also did volunteer work.

Bernard Blankenheimer, 
economist, African affairs specialist

Bernard Blankenheimer, 97, an international economist and African affairs specialist who spent more than three decades at the Commerce Department before retiring as the director of the office of import programs in 1976, died Feb. 7 at a hospital in Washington. The cause was influenza, said his daughter, Susan Blankenheimer.

Mr. Blankenheimer was born in Brooklyn and moved to Washington in 1942. He was an economics and African studies lecturer at Johns Hopkins from 1957 to 1962 and helped establish the African Studies program in the university’s School of Advanced International Studies.

He directed the Africa division of the Commerce Department’s bureau of international commerce from 1962 to 1968 and was a senior commercial officer at the U.S. Consulate in Johannesburg from 1968 to 1970. After retirement, he was a consultant for Economic Consulting Services in Washington. He was also a founder of Temple Emanuel, a reform synagogue in Kensington, Md., and Temple Shalom, a reform synagogue in Chevy Chase, Md. He had residences in Longboat Key, Fla., and Silver Spring, Md.

Jean McCoy, 
bookkeeper

Jean McCoy, 87, a bookkeeper in the 1990s and early 2000s for her husband, Edward McCoy, a Washington-area commercial glass and glazing contractor, died March 10 at her home in Columbia, Md. The cause was cardiac arrest, said a son, J.J. McCoy.

Ms. McCoy was born Jean Guerdat in Buffalo and was a librarian and literacy volunteer in Elmira, N.Y., before settling in the Washington area in the mid-1980s. She spent many years as a bookkeeper for an insurance firm in Baltimore.

Donald Frenzen, 
NSF official

Donald Frenzen, 87, a lawyer who became associate general counsel at the National Science Foundation and later, from 1984 to 2000, was a board member and an administrative law judge with the Armed Services Board of Contract Appeals, died March 28 at an assisted-living center in Arlington, Va. The cause was complications from Parkinson’s disease, said a son, Niels Frenzen.

Mr. Frenzen was born in Oak Park, Ill., and settled in the Washington area in 1958. For the next 13 years, he worked at NASA in the office of general counsel and later on the board of contract of appeals. He worked for the NSF from 1972 to 1984. For many years, he was a member of Virginians for Dulles, a citizens group advocating increased use of Washington Dulles International Airport to cut down on noise pollution and other environmental concerns at what is now Reagan National Airport.

Joan Preusser, 
receptionist

Joan Preusser, 84, a receptionist at the Ethan Allen furniture store in Tysons Corner, Va., from the late 1990s until the late 2000s, died March 27 at her daughter’s home in Front Royal, Va. The cause was complications from hip injury, said a son, John Preusser.

Mrs. Preusser was born Joan Buckley in Stamford, Conn. She was a nurse in Stamford before settling in Reston in 1967. She became a civic activist, helping advocate for the Reston Internal Bus System (RIBS). She helped start St. Thomas à Becket Catholic Church in Reston.

George Winfield, 
Howard U. music professor

George Winfield, 83, a professor in Howard University’s music department from 1968 to 2001, including a stint as chairman, died March 30 at a hospice center in Beltsville, Md. The cause was complications from peripheral arterial disease and renal failure, said a son, Corey Dade.

Mr. Winfield was born in Buffalo and settled in the Washington area to join the Howard faculty. He spent 20 years as an organist, pianist and music director at Peoples Congregational United Church of Christ in Washington. He was a resident of Silver Spring, Md.

— From staff reports