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mcCallumSather recognized on Maclean’s Growth 500 List


Canadian Business and Maclean’s today ranked mcCallumSather No. 395 on the 30th annual Growth 500, the definitive ranking of Canada’s Fastest-Growing Companies. Produced by Canada’s premier business and current affairs media brands, the Growth 500 ranks Canadian businesses on five-year revenue growth. Growth 500 winners are profiled in a special print issue of Canadian Business published with Maclean’s magazine and online at and

mcCallumSather was founded in Hamilton 23 years ago by co-founders Joanne McCallum and Greg Sather. An integrated architectural, mechanical engineering and interior design firm they made the 2018 Growth 500 list with five-year revenue growth of 248%.

“mcCallumSather is honoured to be recognized on the Growth 500 ranking,” says CEO Joanne McCallum. “Through the hard work of our talented team, dedication to design excellence and commitment to sustainability we have achieved organic growth across Southern Ontario and beyond from our Hamilton and Kincardine offices. We’re extremely proud of this substantial achievement and look forward to our firm’s future success, propelled by our upcoming move to the iconic Westinghouse HQ building in Hamilton later this year.”

“The companies on the 2018 Growth 500 are truly remarkable. Demonstrating foresight, innovation and smart management, their stories serve as a primer for how to build a successful entrepreneurial business today,” says Deborah Aarts, Growth 500 program manager. “As we celebrate 30 years of the Canada’s Fastest-Growing Companies program, it’s encouraging to see that entrepreneurship is healthier than ever in this country.”

Since the firms’ inception, mcCallumSather has established itself as a leader in sustainable design, whilst building upon and developing specialist disciplines in heritage, healthcare, transportation, laboratory, education and municipal design. Ancillary complimentary services include project management and LEED facilitation services. Under Joanne’s leadership, the firm of 48 has doubled in size over the past three years, but remains focused on design excellence in a way that balances the social, economic and environmental sustainability of each building we create. The multi discipline firm embraces the chance to push boundaries, create something new and work in close collaboration with clients to help them do the same.

mcCallumSather has achieved an impressive record of significant industry firsts, including the recent completion of Canada’s largest net zero institutional building, The Joyce Centre for Partnership & Innovation at Mohawk College, an award-winning joint venture project with B+H. The McMaster Institute for Music & The Mind is another example. A one-of-a kind project that has the largest virtual environment in the world. Its modern design is the result of a unique combination of engineering and art. Further, mcCallumSather designed and built the first LEED Gold Certified building under the CaGBC, the Region of Waterloo EMS Headquarters.

Joanne adds: “Our clients are integral to what our firm has achieved. Their ambition, foresight and trust in our abilities have been instrumental in allowing us to build inspirational designs that transform communities, develop complex tailored solutions to meet their objectives and create cutting edge projects that have seen mcCallumSather grow from strength to strength.”