• HDR is a full service architecture, engineering and consulting firm with more than 185 offices throughout North America and abroad. In 2007, we merged with Mill and Ross Architects (Kingston, Ontario), a firm founded in 1846, making us the oldest architectural practice in Canada. Today, we are the world’s No. 1 healthcare-design firm and the 2nd largest architecture firm in North America.  We have offices across Canada including Kingston, Ottawa, Toronto, London, and Vancouver. Our team is dedicated to creating high performance architecture expressive of a clear vision for the country’s future.