David R.J. Lefebvre

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...

Wendy E. Best has a well-established family law practice and has earned ongoing recognition as a leading family law practitioner since being called to the bar in 1980. She joined Dunphy Best Blocksom LLP in 1982 and became partner in 1986. Wendy was appointed King's Counsel in 1994. She acts primarily for high net worth individuals and families. While she settles most matters, Wendy’s practice includes litigation. She was inducted as a fellow of the International Academy of Family Lawye...

Aaron Stephenson practises in the fields of insolvency and restructuring, commercial litigation and indigenous law. Mr. Stephenson advises all types of participants in insolvency and restructuring proceedings, both domestic and cross-border, including debtors, creditors, investors and insolvency professionals. His experience spans restructuring proceedings under the Companies' Creditors Arrangement Act, proposal proceedings under the Bankruptcy and Insolvency Act, plans of arrangement under c...

James’ practice involves all aspects of corporate restructuring and insolvency law. He regularly advises clients in reorganizations pursuant to Canadian insolvency statutes, corporate arrangements, receiverships, bankruptcies, security reviews and enforcement proceedings. He frequently represents debtor companies, secured and unsecured creditors, plan or proposal sponsors, purchasers and court officers in domestic and cross-border cases. James strives to work collaboratively with client...

Perry R. Mack, K.C. is a top attorney recognized by Best Lawyers in the practice area(s) of Alternative Dispute Resolution, Appellate Practice, Bet-the-Company Litigation, Construction Law, Corporate and Commercial Litigation, Director and Officer Liability Practice, Insurance Law, International Arbitration and Personal Injury Litigation. Perry R., who practices law in Calgary, Alberta, has been recognized since 2006. This recognition is based on an exhaustive peer-review survey, reflecting t...

Peter Hryniuk is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law. Peter, who practices law in Calgary, Alberta, has been recognized since 2012. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Peter is held by other top lawyers in the same geographic and legal practice area.

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...

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.

Kristian A. Duff is a top attorney recognized by Best Lawyers in the practice area(s) of Insurance Law and Medical Negligence. Kristian 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 Kristian A. is held by other top lawyers in the same geographic and legal practice area.

Jonathan is an experienced civil and commercial litigator who advises clients on a broad range of matters, including commercial litigation proceedings, real estate disputes, estate litigation, insurance matters, and class actions. His practice crosses multiple industries, including construction, real estate, and oil and gas. With experience handling a breadth of cases, Jonathan advises on shareholder disputes, oppression remedies, professional negligence matters, complex commercial conflicts,...