Sonia M. Kammeyer, 71, a real estate agent for Long and Foster in Burtonsville, Md., for the past 32 years, died Feb. 23 at a hospice in Columbia, Md. The cause was breast cancer, said her husband, Kenneth Kammeyer.

Sonia Margaretha Sjoberg was born in Stockholm and was a resident of Dayton, Md. She was a career real estate agent and was inducted into the Montgomery County Realtors hall of fame. She was a painter and sculptor and won local awards for her art.

John G. Moore, 79, an information technology specialist for the federal government for more than three decades, died on his birthday, Feb. 27, at his home in Alexandria, Va. The cause was cancer, said his wife, Marilyn Kane Moore.

Mr. Moore, who was born in Cadillac, Mich., specialized in the application and procurement of new technologies, most recently promoting and contributing to the Smart Card program at the General Services Administration. He was a co-founder of what is now the Smart Card Alliance, a nonprofit association, and a past member of the National Peace Academy Foundation’s board of directors.

Peter F. Kalitka, 84, who spent about 20 years as an Army intelligence officer, including two tours in Vietnam, and retired at the rank of colonel in 1982, died Feb. 14 at a nursing center in Leesburg, Va. The cause was complications from Alzheimer’s disease, said his son, John Kalitka.

Col. Kalitka, who was born in Lawrence, Mass., and was a resident of Paeonian Springs, Va., was a recipient of the Legion of Merit, among other military decorations. He ran a Northern Virginia-based intelligence consulting business, Delta Four Associates, from 1982 to 2007. He was hired as a private investigator by the parents of Christopher McCandless, the subject of the Jon Krakauer book “Into the Wild,” to find their missing son. McCandless died in Alaska in 1992 while living in an abandoned bus.

Gladys Swift, 91, a family caseworker in Montgomery County’s foster-care system from 1965 to 1974, who then held a supervisory role in Prince George’s County’s social work system from 1977 to 1988, died March 9 at a nursing home in Sandy Spring, Md. The cause was dementia, said a son, Aubrey Swift.

Mrs. Swift, a former Bethesda resident, was born Gladys Hubbard to American-born Congregational missionaries in Paotingfu, China. She was a Congregational missionary in China, Turkey and Lebanon before settling in the Washington area in 1959. She became a Quaker, was a founding member of the Bethesda Friends Meeting and participated in antiwar protests.

Mikiko Stebbing, 72, a social worker who trained in law and retired from the State Department in 2012 as a specialist in international adoptions, died March 6 at her home in Washington. The cause was cancer, said a sister, Katherine Domoto.

Mrs. Stebbing, who was born Mikiko Domoto in Berkeley, Calif., was a supervisory social worker for the D.C. Child and Family Services Agency and a public health adviser for the federal Substance Abuse and Mental Health Services Administration before joining the State Department in 2005. She also helped create a partnership between the University of the District of Columbia law school and the Veterans First nonprofit organization, which assists homeless veterans.

Robert M. Jackson, 69, who retired from the Navy in 1989 as a command master chief petty officer and was graphics manager at Accokeek, Md.-based Steuart-Kret Homes, died Feb. 20 at a hospital in Fredericksburg, Va. The cause was respiratory failure and cardiac arrest, said a daughter, Courtney Shires.

Mr. Jackson, a native of Long Branch, N.J., and a resident of King George, Va., retired from the Navy in 1989. He started a company specializing in digital photo restoration before joining Steuart-Kret in 2000. 

Michael P. Gembol, 66, an energy specialist and a past adviser at Advanced Engineering Associates International in Washington, died March 7 at a hospital in Fairfax County, Va. The cause was brain cancer, said a daughter, Ktimene Axetell.

Mr. Gembol was hired by Adm. Hyman G. Rickover, the “father” of the nuclear Navy, to work as a navigator in the Navy’s nuclear submarine program from 1969 to 1979. Mr. Gembol, a native of Ross, Calif., settled in Reston, Va., in 1993 and worked for a decade as a program director at the Institute of International Education. He then worked as an energy consultant on sustainable projects funded by U.S. Agency for International Development and the World Bank from 2004 to 2012.

—From staff reports