From about 1952, Keesing worked full-time as a writer and researcher with
The Bulletin magazine. She mainly worked with
Douglas Stewart, particularly to research and collect historical Australian songs and bush ballads. Keesing was active in a number of literary associations, most notably the
Australian Society of Authors. She edited the ASA journal
The Australian Author from 1971 to 1974. She was chair of the Literature Board,
Australia Council, 1974–1977. She was also active in the English Association and the Australian Jewish Historical Society. She became a council member of the Kuring-gai College of Advanced Education. Keesing's literary career covered several fields, including poetry, literary criticism, editing, children's novels and biography. One of her most well known works is
Shalom, a collection of Australian Jewish stories. She wrote or edited 26 volumes. Keesing wrote two memoirs:
Garden Island People, about her work on Garden Island, and
Riding the Elephant, mainly about her literary career. ==Personal life==