Frazer Macdonald Hay is a Specialist in Architectural re-use and Intervention, Interior Architecture and Architectural conservation. Frazer is the owner of Big Stone Collective and a part time lecturer at Edinburgh University and College of Art prior to this Frazer has been programme leader and Research Centre [CRRB] Director at Edinburgh Napier University.

A former fireman and African expedition leader, Frazer was relatively late to the profession but has since become a leading figure in his field and is now the Educational Chairman for SBID [society for British Interior Design], the Educational consultant for ECIA [European council for interior architecture] and a member of the Scottish Parliament committee for Architecture and the built environment.

Frazer has worked internationally and nationally on iconic buildings such as the new Scottish parliament building and Stirling's Tolboth Arts centre. Frazer also runs workshops on design and architecture in the UK, Belgium, Holland and Norway.