From 1992 to 1993 she was Camperdown House Research Fellow at Royal Holloway College, University of London, during which time she researched and wrote A Good Jew and a Good Englishman, a centenary, but critical, history of the youth movement the Jewish Lads' and Girls' Brigade.
Between 1994 and 1997 she returned to the Hebrew University where she worked at the Center for Jewish Art, helping to develop the Architecture Section of the Index of Jewish Art, whilst pursuing her interest in Anglo-Jewish Architecture and its preservation.
In 1991, following a conference in London that she organised, Kadish founded the Working Party on Jewish Monuments in the UK & Ireland, a pressure group campaigning for the protection of historic synagogues, cemeteries and other sites of Jewish interest in the country.
Her monograph The Synagogues of Britain and Ireland: An Architectural and Social History (Yale University Press 2011) was shortlisted for the American Society of Historians of British Art Prize in 2013.
As well as teaching undergraduate and postgraduate courses on Modern Jewish History and Jewish Art and Architecture at the Universities of London and Manchester, Kadish has worked in the Heritage Sector since 1987, both in the voluntary sector and in private practice.