Dinah set up her design practice in 1970 an, subsequently, her partnership with Roger Mann in 1984. Since 1992, Casson Mann has focused most of its work on the design of museums and exhibitions. Projects have ranged from the object-based ‘British Galleries’ at the V&A and the Great North Museum in Newcastle through to the highly technological Churchill Museum in the Cabinet War Rooms and the ‘Lord Ashcroft Gallery’ at the Imperial War Museum.
During the last six years, they have worked together on projects in the UK, the USA, Russia, Italy and the Middle East. Their work has been published extensively and has won numerous awards.
Dinah is a trustee of the Creative Education Trust, The Charleston Trust and, with Roger Mann, was elected to the Faculty of Royal Designers for Industry in 2006 of which she is currently the Master.