Margaret is a member of these professional associations:
- Australasian Registrars Committee
- Australian Institute for the Conservation of Cultural Material
- Australian Museums and Galleries Association (formerly: Museums Australia)
- Australian Society of Archivists
- Governance Institute of Australia
- International Council of Museums
- Interpretation Australia Association
Margaret also supports several cultural organisations through membership subscriptions and donations, including:
- Australia ICOMOS (International Council on Monuments and Sites)
- Australian Football Heritage Group
- Australian Society for Sports History
- Ephemera Society of Australia
- C J La Trobe Society
- Grainger Museum
- Heidelberg Historical Society and Museum
- History Council of Victoria
- Humanities 21
- Melbourne Maritime Heritage Network
- National Museum of Australia
- National Trust of Australia (Victoria)
- Queenscliffe Maritime Museum
- Royal Botanic Gardens (Melbourne)
- Royal Historical Society of Victoria
- State Library Victoria
- The English-Speaking Union (Victoria Branch)
- Williamstown Historical Society