Jamieson practiced architecture for four decades, leading a prominent Hobart practice which carried out a wide variety of projects around Tasmania and beyond.
Over the years he held many elected positions, state and national, in the Royal Australian Institute of Architects (now the AIA), culminating in his election as National President. He was elected a Life Fellow in 1992.
Jamieson chaired or was a member of several national design awards juries who visited and evaluated diverse and far-flung projects of national significance.
He was an Alderman of the Hobart City Council, 1999-2002, served as a Commissioner of the Tasmanian Planning Commission (formerly the RPDC), 2006-2011, being later engaged by the TPC as a consultant, serving on delegated panels.
Jamieson was also a member of the Hobart City Council’s expert Urban Design Advisory Panel for a number of years.