Contact Information

416 314 2328

26 Soho Street #350
Toronto, ON M5T 1Z7

Sarah Gray | M.Sc., P.Eng., CAHP

Principal, Building Science Specialist

Sarah Gray | M.Sc., P.Eng., CAHP

Principal, Building Science Specialist

Sarah is a Building Science Specialist whose passion lies in the sensitive repair of historic buildings. Her portfolio includes an array of iconic buildings, including the Confederation Life Building and Commerce Court North, both located in Toronto where she has worked for over 15 years.

Her primary focus is on the evaluation and exterior rehabilitation of Existing Buildings and their assemblies, with work in the commercial, residential, and institutional sectors. She has worked on the design and construction review of deep energy retrofit projects for older residential towers.

Sarah also contributes to building enclosure design for New Buildings projects as well as building enclosure commissioning projects, where she provides insight on design, energy, and durability requirements.

After attending the University of Cincinnati to complete her bachelor of science in civil engineering, Sarah achieved her master of science in historic preservation at the University of Pennsylvania. She has served on the Board of the Canadian Association of Heritage Professionals and is currently a peer reviewer for the Association of Preservation Technology’s APT Bulletin.

Steve Kemp | M.A.Sc., P.Eng., LEED AP BD+C, LEED Fellow

Principal, Senior Energy and Sustainability Specialist

Steve Kemp | M.A.Sc., P.Eng., LEED AP BD+C, LEED Fellow

Principal, Senior Energy and Sustainability Specialist

As the head of RDH’s Energy & Sustainability services, Steve drives energy-related initiatives and explores avenues for growth within this emerging practice area.
Steve is renowned as one of Canada’s top energy efficiency experts. He works with architects and developers to lay the foundations for sustainable and high-performance buildings. He is skilled in numerous energy technologies, including geothermal energy, smart lighting control, solar power generation, solar thermal, energy recovery, and thermal storage.
Steve was part of the team that recently unveiled Mohawk College’s Joyce Centre for Partnership & Innovation, the largest net-zero building in North America. To add to his lengthy list of achievements, he was presented with the Green Building Champion Award by the Canada Green Building Council in 2014.
A LEED Fellow, Steve is also a member and past chair of the Energy & Engineering Technical Advisory Group LEED Canada.

Alex Lukachko | M.Arch.

Principal, Senior Building Science Specialist

Alex Lukachko | M.Arch.

Principal, Senior Building Science Specialist

Alex is a Senior Building Science Specialist and the Regional Manager for our Ontario offices.

Alex has a background in architecture and building science and is typically involved in early project stage consulting for high-performance new construction or retrofits, using an integrated approach to the enclosure, mechanical system, and energy performance design.

In his role as Regional Manager, Alex oversees numerous building science professionals and manages a variety of corporate initiatives. His knowledge of RDH’s broad range of services allows him to support staff as they take on new responsibilities and roles. He has played an important role in the development of personnel across our Energy & Sustainability, New Buildings, and Building Science Laboratories.

Alex is also a Lecturer at the John H. Daniels Faculty of Architecture, Landscape and Design at the University of Toronto. He has active research interests in the development of future building enclosure systems and the design of high-performance, low environmental impact buildings. In particular, Alex is interested in the link between architectural design and quality assurance that ensures high building performance.

Kristen Yee Loong | B.A.Sc., P.Eng., LEED AP BD+C

Associate, Energy and Sustainability Specialist

Kristen Yee Loong | B.A.Sc., P.Eng., LEED AP BD+C

Associate, Energy and Sustainability Specialist

Kristen brings an invaluable depth of knowledge to the Energy & Sustainability team with her experience in sustainable design and construction practices. Her expertise includes consulting on energy-efficient system design strategies for high-performance buildings, LEED and code compliance, and simulating building energy use. She also performs energy efficiency assessments of Existing Buildings projects to identify areas where energy consumption can be reduced and energy savings could be made.

Working with design teams, government agencies, and utilities, Kristen gathers energy consumption data through submetering and utility bills to analyze and benchmark building energy performance.

Before joining RDH in 2016, Kristen worked at a sustainable buildings consulting firm in Toronto as a Senior Energy Analyst, where she led the Energy Analyst team.

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