Diana has been involved as a Trustee in the governance of a number of charitable bodies including the National Trust for Scotland, The Royal Botanic Garden of Edinburgh, The Scottish Seabird Centre in North Berwick, the Scottish International Education Trust and currently chairs the Scottish Association of Marine Science (SAMS), an academic partner of the UHI. She was the Chair of Arts and Business Scotland until 2022 and is an appointed member of the Scottish Committee of the National Lottery Heritage Fund.