Born in 1928 Jasson worked as a clerk. She was active in the Port Elizabeth trade union movement, organising food and canning workers, and textile workers, leading several strikes. Her daughter was born during the treason trial proceedings. She was acting secretary of the Eastern Cape Action Committee from 1954 to 1955. In 1956 she was a committee member of the South African Congress of Trade Unions (SACTU) National Conference.