Mary Triantis, 46, a former government secretary who was active in Greek community organizations here, died of an aneurysm Saturday at George Washington University Hospital.

Miss Triantis, who lived in Silver Spring, began working for the government about 1949. She had worked for the Department of Commerce and on a committee on NATO headed by Rep. Paul Findley (R-Ill.). During the 1960s, she worked for the Office of the Surgeon General.

She left government service in 1967 to manage a woman's clothing store and was employed by Dana Robin's women's apparel store here at the time of her death.

In 1961, Miss Triantis helped found the Silver Spring chapter of the Daughters of Penelope, a women's auxiliary of the American Hellenic Educational Progressive Association. She served as the chapter's first president.

She also had served as president of the chapter's committee to combat Cooley's anemia, a disease affecting people of Mediterranean heritage, and on a number of charitable committees.

She was born in Charlotte, N.C. and grew up in this area. She attended Strayer business college here and later studied Greek history in Athens, Greece, for several years.

Survivors include her mother, Evangeline, of the home in Silver Spring; a sister, Patricia Calomeris, and two brothers, Anthony and Ted, all of Silver Spring, and a brother. John, of Casper, Wyo.

The family suggests that expressions of sympathy be in the form of contributions to Cooley's Anemia, 10312 Conover Dr., Silver Spring, 20902.