Born Mary Charlotte Nash in Baltimore, she attended the old St. Katherine's Commercial School in East Baltimore. She did modeling for the Hecht Co. as a young woman.
After raising a family, she became an Army civilian employee. She worked at the Intelligence Command at Fort Holabird and was trained as an adjudicator for security clearances. She rose to the GS-12 level and received numerous performance awards. She retired in 1983 from Fort Meade.
"She had perseverance and was attentive to detail in her work with the Army," said her son, Paul V. Sneeringer Jr. of Dundalk. "She had these same characteristics in her domestic life."
She enjoyed summers in Ocean City. She also knitted and gardened, and was a reader and a cook.
A Mass of Christian burial will be held at 10 a.m. Wednesday at St. Francis of Assisi Roman Catholic Church, 3615 Harford Road, where she was a member.
In addition to her son, survivors include three daughters, Charlotte Anne Walsh of Savannah, Ga., Mary Virginia Schuerholz of Timonium and Rodell Ramirez of Alajuela, Costa Rica; eight grandchildren; and four great-grandchildren. Her husband of 54 years, Paul Vincent Sneeringer Sr., a life insurance salesman, died in 1994.