Douglas A. McGillivray, K.C.

Allison Sears is a regulatory litigator and a member of Fasken’s Global Energy and Climate Group in Calgary. Her practice focuses primarily on energy and environmental matters. With experience before all levels of court in Alberta, Allison also represents clients in arbitrations, mediations, and regulatory proceedings before various federal and provincial regulators including the Canada Energy Regulator, the Alberta Energy Regulator, the Alberta Utilities Commission, the Environmental A...

Roxanne was called to the New Brunswick and Ontario Bars in 2003. She practiced in New Brunswick and then Ontario before settling in Calgary and joining Carbert Waite LLP in 2008. Roxanne became a partner in the firm in 2013. She practices litigation with a focus on employment law, including human rights, privacy, and occupational health & safety matters. Roxanne represents both employers and employees in a wide range of complex employment law matters. Roxanne’s employment practice ...

Tom Valentine has more than 30 years of experience in the oil and gas industry, both as a barrister and a solicitor. In 2002 and 2003, Mr. Valentine lived in Doha, Qatar, where he was senior counsel (projects) with Qatar Petroleum. While in Qatar, Mr. Valentine was responsible for a number of international gas and LNG projects, including projects in the United Kingdom (Qatargas II), India (RasGas) and Spain (Endesa Generacion). Since returning to Canada Mr. Valentine’s work continues to...

Steve Leitl's practice covers a broad range of commercial litigation matters, with an emphasis on securities, M&A, directors'/officers' liability, class actions and internal investigations. Mr. Leitl has conducted proceedings in the courts of Alberta, Ontario, Manitoba and Canada (Federal Court) and appeals in the Ontario Court of Appeal and Alberta Court of Appeal. He has conducted various regulatory proceedings before the Ontario, Alberta and Manitoba securities commissions and the Albe...

Clara is a leading energy regulatory lawyer who specializes in the power sector. She is currently serving as head of the firm's Litigation & Dispute Resolution Group in B.C., managing the litigation departments in those offices. Clara advises clients on a broad range of matters before regulatory boards and the courts, including market rules and compliance, long-term resource planning, electricity export permits, international power line approvals, rate design, and capital project permitti...

Derek Allchurch is a top attorney recognized by Best Lawyers in the practice area(s) of Personal Injury Litigation. Derek, who practices law in Calgary, Alberta, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Derek is held by other top lawyers in the same geographic and legal practice area.

Patricia Olyslager completed her law degree at the University of Calgary and was called to the bar in 2000. Patricia completed her articles with Parlee that same year. She then moved on to another firm and rejoined Parlee in 2013, becoming a Partner in 2019. Patricia’s practice primarily focuses on litigation, specializing in insurance coverage and defence, disability, product liability, and commercial litigation. Prior to attending law school, Patricia received a degree in nursing from...

Julie D’Avignon is a partner and head of the Tax Group in Calgary. Her practice focuses on providing tax advice in connection with mergers and acquisitions, corporate reorganizations, equity investments, flow-through share transactions and financings. Julie has extensive experience working with Canadian and international clients, public and private entities, tax-exempt entities, and private equity firms. Julie has particular expertise in resource and energy taxation, including with resp...

Ben Hudson is a top attorney recognized by Best Lawyers in the practice area(s) of Tax Law and Trusts and Estates. Ben, who practices law in Calgary, Alberta, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Ben is held by other top lawyers in the same geographic and legal practice area.

Joshua (Josh) Sadovnick has a split practice, with focuses on commercial litigation and employment disputes, both insured and uninsured claims.With reference to commercial litigation, Mr. Sadovnick regularly represents insurers, owners, developers, general contractors, subcontractors and suppliers. Mr. Sadovnick has acted as counsel in commercial disputes on a variety of complex claims, including general commercial and construction disputes, deficiency claims, construction failures (including...