Dufferin "Duff" Harper

Jessica A. MacDonald is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law and Family Law Mediation. Jessica A., 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 Jessica A. is held by other top lawyers in the same geographic and legal practice area.

David Eeles has over 15 years’ experience representing project developers, sponsors, industrial hosts and other project participants in connection with the acquisition, development, construction, financing, operation, restructuring and disposition of energy, infrastructure and industrial projects, including renewable energy projects, power plants, cogeneration plants, heavy oil upgraders and public-private partnership projects. Mr. Eeles has acted as the lead lawyer on a number of such ...

Patrick Laycock is a top attorney recognized by Best Lawyers in the practice area(s) of Intellectual Property Law. Patrick, 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 Patrick is held by other top lawyers in the same geographic and legal practice area.

Vhari’s practice focuses on commercial litigation and arbitration, with an emphasis on professional and product liability, and wills, trust, and estate litigation. She represents engineers, architects, design professionals, directors and officers in defending errors and omissions claims, often in connection with disputes related to large infrastructure and residential projects. Vhari takes a practical, efficiency-minded approach to litigation and dispute resolution. She has experience b...

As one of our founders, Joe was appointed King’s Counsel in 1994 and a Fellow of the Chartered Professional Accountants of Alberta in 1995. He offers tax advice on a wide variety of matters, including resource tax, mergers and acquisitions and dispute resolution. An impactful leader, Joe guides our lawyers with active mentorship and mindful team building. Joe gives back to the community in a myriad of ways, both in an academic and volunteer capacity. He has taught at the University of A...

Crispin is the Administrative Partner of the Calgary office and practices in the areas of business law, corporate finance and securities, mergers and acquisitions, and energy. He advises clients on corporate finance, public and private M&A, corporate reorganizations, and governance matters across a range of industries, including oil and gas, oilfield services, mining, power, and manufacturing. Crispin has significant experience with corporate finance and securities transactions, including...

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.

I am an arbitrator, mediator, and litigator and have practiced from Calgary, Canada, for over 30 years. My full biography is available on my firm's website at: https://jssbarristers.ca/litigators/sabri-m-shawa/

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...

Karen Pirie, KC is a top attorney recognized by Best Lawyers in the practice area(s) of Health Care Law, Medical Negligence and Professional Malpractice Law. Karen, who practices law in Calgary, Alberta, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Karen is held by other top lawyers in the same geographic and legal practice area.