Heather L. Treacy, KC., ICD.D.

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

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...

Caroline Lee, KC is a senior family law practitioner specializing in family law and alternative dispute resolution including collaborative family law, mediation and arbitration. She joined Dunphy Best Blocksom LLP 1989 with an established background in all aspects of family law. Caroline became a partner in 1994 and was managing partner of the firm for six years. She was appointed King’s Counsel in 2004. Caroline has been involved as a family law teacher and lecturer with the Legal Educ...

Laura Warner is a top attorney recognized by Best Lawyers in the practice area(s) of Administrative and Public Law and Corporate and Commercial Litigation. Laura, who practices law in Calgary, Alberta, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Laura is held by other top lawyers in the same geographic and legal practice area.

Mark Sawyer articled with Dunphy Best Blocksom LLP in 2003 and became a partner in 2010. Mark’s practice focuses on the business and commercial aspects of the law, as well real estate and estate planning. Mark works with many privately held businesses, advising them on their corporate, financing, contract and shareholder matters. Mark provides advice as well on the incorporation of new businesses and the sale and purchase of existing companies. He also acts for clients who are buying, s...

Thomas Cumming is a top attorney recognized by Best Lawyers in the practice area(s) of Insolvency and Financial Restructuring Law. Thomas, 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 Thomas is held by other top lawyers in the same geographic and legal practice area.

Joel Fairbrother is an employment lawyer. He is a partner and co-founder of Bow River Law LLP. Joel's key practice areas are employment law, labour law and human rights, but he does some general civil litigation as well. Prior to law school, Joel obtained a BA degree in Political Science from University of Alberta. He attended law school at University of Saskatchewan and obtained his Juris Doctor in 2011. Joel has experience litigating at all levels of court and many different tribunals in Al...

Katherine Prusinkiewicz is the knowledge lawyer for the Calgary office, working to leverage the practice's collective wisdom to ensure efficiency and uniform quality. She supports lawyers in our business law group with model documents and precedents, legal updates, training and other information needs and assists in our client communication program. As a result of our knowledge management initiatives and the practice’s culture of contributing and sharing knowledge, our clients can expec...

Carsten is a founding member and senior partner of JSS Barristers, the largest civil litigation boutique law firm in western Canada. His practice emphasizes complex and multi-party corporate and commercial litigation, commercial class actions, oil & gas litigation including royalty, environmental and CAPL issues, shareholder disputes, advising creditors and others in insolvency matters and professional negligence claims. During a leave of absence from JSS Barristers, he served as Senior L...

Kevin Johnson’s practice focuses on corporate and securities law matters, acting for a variety of participants in capital markets transactions. He has acted for issuers, selling shareholders, independent committees of boards of directors and investment dealers in public and private offerings of securities, related-party transactions, corporate reorganizations and mergers and acquisitions. Mr. Johnson has significant experience in cross-border public offerings and both friendly and hosti...