Sossy Nercessian received her BA from the Beirut College for Women in 1973, her studies having been focused on painting, sculpture, interior architecture, advertisement, and art education. In 1977 and 1978, she studied painting on silk at the Studio De Peinture Sur Soie, Chateney, in Malabry, France. From 1973 to 1978, Nercessian was a textile and embroidery designer in Beirut, Lebanon, during which time she also worked in advertising as a layout designer. From 1973 to 1982, she was textile designer, painter, and decorator for a high-end furniture company, also in Beirut.
Nercessian moved to the United States, and began doing freelance design work, as well as volunteering at Museum of Fine Arts in Boston, the Society of Arts and Crafts in Boston, and the Armenian Library and Museum of America. She also has volunteered extensively as an art teacher for elementary school students, and illustrated a children’s book for the Disability Law Center in Boston.
She is a published poet and a contributor to the Armenian poetry project.