Colena Der

Robin Acworth is a commercial lawyer whose practice focusses on the upstream and midstream energy sectors, including LNG and renewables. Robin has extensive experience advising on energy projects and transactions in Canada and in a broad range of other jurisdictions. His experience includes advising on the sale and purchase of LNG and other commodities, transportation, construction and use of terminals, power generation facilities and other infrastructure, both onshore and offshore, including...

Over the 20 years Tonii Roulston has been a member of the Calgary Bar Association, she has built her long-standing reputation as a tough criminal defence lawyer. Known for her strategic thinking, and effectiveness in the courtroom, she has represented a variety of challenging and high-profile cases. As a female lawyer, she holds an advantage in vigorously questioning female complainants on difficult details including their motivations to lie and inconsistencies in their accusations. Tonii is ...

Craig Story is a partner in the Capital Markets and Mergers & Acquisitions Groups. He has served on the firm’s Partnership Board, as well as on the management group for the Calgary office. Craig’s practice focuses on corporate and securities law, including public and private capital markets offerings, private equity and venture capital funds, mergers and acquisitions and corporate governance. His corporate finance practice includes advising issuers, major investors and underwr...

Katharine Zhang is a top attorney recognized by Best Lawyers in the practice area(s) of Trusts and Estates. Katharine, who practices law in Calgary, Alberta, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Katharine is held by other top lawyers in the same geographic and legal practice area.

Tanya A. Frizzell is a top attorney recognized by Best Lawyers in the practice area(s) of Insurance Law and Personal Injury Litigation. Tanya A., who practices law in Calgary, Alberta, has been recognized since 2022. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Tanya A. is held by other top lawyers in the same geographic and legal practice area.

Bill practices corporate commercial, construction and energy law, with an emphasis on public-private partnerships and construction contracts. His expertise includes: Public-private partnerships Rail and light rail projects Commercial, residential and mixed-use development projects Power plant and industrial EPC contracts Procurement documents and agreements to design, build and construct any asset Mergers and acquisitions Bill completed his articles with BLG. Before law school, he worked for ...

PROFESSIONAL EXPERIENCE: Mr. Halt graduated as the gold medal recipient from the University of Saskatchewan in 1986 and in 1988-89 he had the honour of serving as a law clerk to Madam Justice Bertha Wilson of the Supreme Court of Canada. Following his clerkship, Mr. Halt relocated to Calgary and has since practised civil litigation, including insurance with an emphasis on professional liability, corporate commercial litigation, securities litigation, franchise litigation, insolvency, construc...

E. Jane Butcher is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Commercial Litigation. E. Jane, 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 E. Jane is held by other top lawyers in the same geographic and legal practice area.

Peter T. Linder, K.C. is a top attorney recognized by Best Lawyers in the practice area(s) of Appellate Practice, Bet-the-Company Litigation, Construction Law, Corporate and Commercial Litigation, Director and Officer Liability Practice, International Arbitration and Product Liability Law. Peter T., who practices law in Calgary, Alberta, has been recognized since 2008. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Peter T. is held by other ...

Jamie Flanagan is an experienced advocate who has guided his clients through difficult times for more than 30 years. Focusing on civil litigation, he handles commercial and construction litigation, employment law disputes, and estate litigation. When a matter proceeds to trial, Jamie has the litigation experience to aggressively and thoroughly pursue his clients' interests. He has appeared before the provincial, superior, and appeal courts of Alberta, British Columbia, and Saskatchewan on a w...