Prior to her time at ESTC, Ann Thomson studied briefly under Jon Molvig in Brisbane. She held her first solo exhibition at Watters Gallery, Sydney in 1965 and has exhibited widely since, including solo exhibitions at Gallery A, Sydney (1974–1982). In 1978 Thomson undertook a residency at the Cité International des Arts, Paris and has continued to exhibit in France. Her work is held in major collections including the National Gallery of Australia; Thyssen-Bornemisza Collection, Spain; Artbank; most Australian state and many regional and university collections. Major commissions include the Convention Centre, Darling Harbour, Sydney (1987) and the Australian Pavilion, World Expo, Seville, Spain (1992). Recent solo exhibitions include Ann Thomson & Contemporaries, National Art School Gallery, Sydney (2016); and Freehand, Drill Hall Gallery,Canberra (2015). She is represented by Defiance Gallery, Sydney; Charles Nodrum Gallery, Melbourne and Stéphane Jacob, Paris.