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Andrew Parley listen


Andrew* has a background in mechanical engineering that enables him to understand technical issues, from complex infrastructure projects to nuclear power projects. Using his technical expertise, Andrew engineers§ solutions to complex cases dealing with everything from construction law to finance to energy. Andrew’s diverse practice leads to success for his clients, across all sizes and industries, in all levels of court in Ontario and the Supreme Court of Canada. With his strong advocacy skills and attention to detail, you can count on Andrew to build a winning case. .



Andrew Parley

is a partner at Lenczner Slaght.

"Andrew is a compelling and capable advocate with a reputation and track record that speaks for itself but he is also a brilliant strategist in a broader sense, embodying the wisdom of picking your battles while avoiding others." — Client Testimonial

Andrew's practice spans a diverse range of industries from energy to construction and infrastructure to securities and finance. Focusing on commercial litigation matters, he represents individuals, and businesses of all sizes. As a mechanical engineer by training, Andrew has a strong understanding of engineering and construction project management.

Some of the clients that Andrew has represented include Crosslinx Transit Solutions, Aecon, British Energy, 407 ETR, the Gupta Group, McDonalds Restaurants of Canada Limited, BMO Nesbitt Burns, SNC Lavalin Inc., and the Government of Canada. He has appeared before the Ontario Superior Court, the Ontario Divisional Court, the Ontario Court of Appeal, the Supreme Court of Canada as well as various administrative tribunals. Andrew has also been involved in several private, local and international arbitrations.

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  • The Advocates' Society - Chair of the Construction Law Practice Group

  • Canadian Bar Association

  • Ontario Bar Association

  • Pro Bono Law Ontario

  • Law Help Ontario

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  • Benchmark Canada (2018-2024)

    Litigation Star – Commercial, Construction, Energy, Securities

  • Benchmark Litigation (2017-2019)

    Under 40 Hotlist

  • Best Lawyers in Canada (2020-2024)

    Health Care Law, Medical Negligence

  • Canadian Legal Lexpert® Directory (2020-2024)

    Litigation - Corporate Commercial, Medical Negligence, Professional Liability

  • Lexpert Special Edition: Canada's Leading Infrastructure Lawyers (2023-2024)

  • Lexpert Special Edition: Canada's Leading Litigation Lawyers (2023)

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