Deirdre A. Sheehan

Gregory F. Peterson is a lawyer recognized by Best Lawyers in the practice areas of Corporate Law and Private Funds Law. Gregory F. practices law in Calgary, Alberta Best Lawyers has recognized Gregory F. Peterson since 2023. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Gregory F. Peterson is held by other lawyers.

Krista Schofer is a lawyer recognized by Best Lawyers in the practice areas of Immigration Law and Labour and Employment Law. Krista practices law in Calgary, Alberta Best Lawyers has recognized Krista Schofer since 2027. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Krista Schofer is held by other lawyers.

Colin McKinnon is a lawyer recognized by Best Lawyers in the practice area of Personal Injury Litigation. Colin practices law in Calgary, Alberta Best Lawyers has recognized Colin McKinnon since 2027. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Colin McKinnon is held by other lawyers.

Lucy L'Hirondelle is a litigator whose practice encompasses a broad range of commercial litigation matters and international arbitration with an emphasis on oil and gas litigation/arbitration, contractual disputes, management-side employment litigation. She also has experience conducting third-party investigations. Lucy has worked in the Calgary litigation group since 2012 and has appeared before all levels of court in Alberta, the Nova Scotia Supreme Court, and is familiar with Federal Court...

Christiana joined Parlee McLaws’ Calgary office as an Associate in 2014 upon the completion of her Articles with the firm, having been previously admitted to the practice of law in New York State in 2010. She is an experienced trial and appellate litigator with a practice focused on civil litigation and administrative law, specifically in the areas of energy, construction, aviation, municipal governments, and insurance. Christiana has represented clients before the Alberta Court of Just...

Dion Legge practises tax law. His practice focuses on the income tax aspects of corporate reorganizations, mergers and acquisitions, takeovers, debt and equity financings, and the taxation of flow-through vehicles. Mr. Legge also advises on tax-planning issues related to international structures for Canadian-based multinational corporations, on investments by non-residents in Canada, and on structuring cross-border mergers and acquisitions, divestitures and financings. He joined our Calgary o...

Ricki Johnston is a lawyer recognized by Best Lawyers in the practice areas of Corporate and Commercial Litigation and Insurance Law. Ricki practices law in Calgary, Alberta Best Lawyers has recognized Ricki Johnston since 2025. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Ricki Johnston is held by other lawyers.

Ken’s practice focuses on tax litigation and tax dispute resolution. With over 30 years as a tax lawyer, he also has extensive experience in corporate tax planning, reorganizations and personal tax planning. Becoming partner at Felesky Flynn in 1996, Ken was co-managing partner from 2008 to 2015 and was appointed King’s Counsel in 2008. He has represented taxpayers before the Supreme Court of Canada, Tax Court of Canada, Federal Court of Appeal, Alberta Court of Queen’s Benc...

Tim Ryan is a partner in Gowling WLG's Calgary office. He practises actively in the area of health law, professional regulation and professional liability. Tim's practice includes class action proceedings, administrative law and the defence of medical, pharmacist and engineering malpractice cases. He also has an interest in public and private international law matters. While at Cambridge, Tim concentrated his studies in public and private international law, including studies at the Lauterpach...

Tim is peer ranked as one of the top labour and employment lawyers in Canada. For over 25 years, Tim has advocated for federally and provincially regulated employers on matters related to workplace law. He acts as lead counsel on significant labour, employment, and workplace human rights cases, including in matters that have been elevated to the Supreme Court of Canada. Tim sets a new standard for employer advocacy. His commitment to building trusting relationships through counseling employer...