Our People

We are constantly listening, learning and adapting. That defines what we do.
It is our commitment to sustainability, that defines who we are.
Together, our vision is to create transformative environments, having fun in the process.

Joanne McCallum

CEO

B.A., M.E.Des.(Arch.), OAA, FRAIC, LEED AP

As Co-founder and Director, Joanne provides direction and oversight on a full range of building typologies. Her work is informed by vigorous research and careful client consultation, working from first principles in a way that thoughtfully translates her clients’ needs into physical reality.

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Michelle Austin

COO

MAATO, OBEC, LEED AP

Michelle embodies exceptional knowledge and management skills related to the construction process. She is responsible for the firm’s field review services and provides critical peer review oversight on all of our documentation, ensuring projects meet or exceed the firm’s exacting standards.

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Drew Hauser

Director

Hons. Vis. Arts., B.Arch., OAA, MRAIC, CAHP

Drew is an artist, businessman and director here at mcCallumSather. He is passionate about shaping environments that put our clients’ business and research objectives at the forefront, and has been instrumental in providing award-winning design solutions that establish a precedent and are carefully tailored to our clients’ goals.

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Kevin Van Hartingsveldt

Associate

Dipl.T.(Arch.), LEED® AP

Kevin brings an exceptional attention to detail and technical understanding to each project. Kevin has been with mcCallumSather since 2008, serving clients in the healthcare, institutional, civic, transportation and residential sectors. Working as both a technologist and project manager, he consistently demonstrates an ability to efficiently manage complex projects of all size and scope, to […]

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Liam Brown

Associate

OAA

Our clients appreciate Liam’s systematic and steady approach to his work, and ability to mix creativity with practical solutions in a way that thoughtfully addresses our client’s requirements. His ability to listen, absorb and respond to our clients’ vision has been essential in our success on projects in multiple sectors, specifically his growing portfolio of […]

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William Neal

Associate

OAA, RAIC, PMP

William is a registered architect in Ontario with over seven years of working architectural experience, a hands-on construction background, and complementary technical degree.  In 2016 he earned his PMP designation, which has helped the firm with its development of more sophisticated project management protocols for the benefit of our clients. Further, his leadership has helped […]

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Mary Georgious

Associate, Mechanical Engineering Lead

P.ENG, LEED AP BD+C

An enthusiastic leader, Mary offers extensive experience in HVAC, fire protection, plumbing and medical gas system design. As the firm’s mechanical engineering lead, one of Mary’s specific strengths is in project management and problem solving, ensuring that all mechanical solutions seamlessly integrate into a project’s design.

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Dora Lomax

Principal, Interior Design Lead

NCIDQ, ARIDO, IDC, LEED® AP

Dora has shaped beautiful and impactful interiors, from complex healthcare projects to multi-unit residential developments. She brings a depth of understanding in how to creatively connect the science of design with our clients’ objectives, delivering spaces that meaningfully advance our clients’ goals.

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Greg Sather

Director

B.Arch., OAA, MRAIC, LEED AP

Co-founder and Director, Greg is responsible for design direction, sustainable design initiatives and providing technical excellence oversight for the firm’s projects. His experience with the design of high performing spaces has resulted in ground breaking projects and firmly established his reputation as a leader in sustainable design.

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Heather Gordon

CFO

CPA, MACC

Heather brings years of financial and business experience to mcCallumSather. With her professional Chartered Accountant designation and Masters of Accounting degree, she ensures that all aspects of the business and all projects are managed with financial integrity.

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