Sean O’Reilly is a graduate of the University of Waterloo School of Architecture where he was fortunate in being able to partake in the Rome Program, a 4 month live/study program in Rome Italy. A keen desire for knowledge and the study of design excellence has taken Mr. O’Reilly across Canada and abroad for both travel and work assignments. He has worked for a number of the most well-known and celebrated architectural firms in North America including Jung Brannen Associates in Boston, IKOY in Winnipeg, Kuwabara Payne McKenna Blumberg, Shore Tilbe Irwin and Partners, and Moriyama + Teshima of Toronto. The last large office was Quadrangle Architects where he was an Associate at the time he left to form 3stones architecture + design in 2002. His experience and expertise spans a wide range of building types and sizes from single family residential to multi-unit, high rise residential, small and large commercial and retail, and public / institutional projects including libraries and community centres. Mr. O’Reilly has been living in the Alliston area since 1990.

Since forming the 3stones architecture + design studio, Mr. O’Reilly has had tremendous success with a wide variety of project types across central and southern Ontario. His clientele includes local governments, large commercial enterprises such as banks, and smaller independent commercial and retail clients. 3stones has also produced numerous highly successful institutional projects both public and private in nature.

Mr. O’Reilly has always believed in the importance of being engaged with the community both locally and within the architectural profession and design community. A list of his community activity includes :

Ontario Association of Architects
Member of Council 2005 to 2010
Senior Vice President, and Treasurer 2006, 2007
President 2008
Member ExAC Development Task Force 2006 to 2008
Member CExAC 2008 to 2012
Chair CExAC 2010 to 2012

Royal Architectural Institute of Canada (RAIC)
Member since 2002
Inducted as Fellow in 2009

Ontario Association of Applied Architectural Sciences (OAAAS)
Member of the Board of Directors 2005 to 2007

ProDemnity Insurance Company
Member of the Board of Directors 2006 to 2007

Foundation for Architectural Research (F.A.R.)
Member of the Board of Directors 2009 to present

Ontario Association of Certified Engineering
Technicians and Technologists (OACETT)

Member of the Board of Directors 2007 to 2011
Regulatory Task Group 2011 to 2013
Complaints and Discipline Process Reviewer 2013 to present

Canadian Green Building Council (CaGBC)
Member 2009 to 2012
LEED A.P. (Leadership in Energy and Environmental Design) Accredited Professional (AP)

Rotary International
Member, Alliston Club – 1997 to present
President 2005-2006

Heritage Barrie
(L.A.C.A.C. – Committee Member 1997 to 2000)

Honours and Awards
2003 Competition Finalist – Oakview Community Centre – Wasaga Beach
2004 Competition Finalist – Norwegian Canadian Cultural Centre – Bracebridge
2005 Competition Finalist – Simcoe County Museum Expansion – Barrie
2005 OAA Award of Excellence – The Morgan Condominiums, Toronto
(Quadrangle Architects Ltd, Sean O’Reilly Project Architect)
2007 Paul Harris Fellow – Rotary International
2008 Competition Finalist – Toronto Ski Club – Collingwood
2009 Inducted as Fellow with Royal Architectural Institute of Canada (RAIC)
2009 Competition Finalist – Huntsville Active Learning Centre – Huntsville
2010 Competition Finalist – Sydenham Public Library – Frontenac
2013 Competition Winner – Foley Community Centre – Foley
2016 Competition Winner – McKellar Fire Hall – McKellar
2017 Competition Winner – Southampton Town Hall and Library