Painting Oliver trained as a painter and was most known as a portrait artist. She taught evening classes at the Glasgow School of Art, and taught art at the
Craigholme School.
Writing Beginning in 1963, Oliver wrote for over 25 years as ''
The Guardian's'' Scottish arts correspondent, reporting the "optimism" she saw in the country's theatre, opera, music, painting and sculpture. She was one of number of figures who were instrumental in establishing a body of critical writing on contemporary art in the 1960s and 1970s. Cordelia Oliver also wrote books and exhibition catalogue essays, including works on
Joan Eardley,
Jessie M King, and
Bet Low. She was known as a particular supporter of women artists, including
Margot Sandeman,
Winifred Nicholson,
Pat Douthwaite, and embroiderer Kathleen Mann. She also promoted the work of Romanian artist
Paul Neagu, and was a "great supporter" of the
Citizen's Theatre. In 2005 she gave an oral history interview to the Scottish Oral History Centre at the
University of Strathclyde. == Selected publications by Oliver ==