Mark Holthe

Dereck is a senior family law lawyer, having practiced exclusively in this area since being called to the Alberta Bar in 1995. Dereck holds a B.A. (Hons.) from McGill University followed by his L..L.B. from the University of Alberta. As a skilled litigator, he has appeared successfully at all levels of court in Alberta as well as in numerous arbitrations. Dereck also has extensive experience in negotiating settlements and drafting agreements. He applies a reasoned approach to his files and en...

Arif is a commercial litigator based in Calgary. He has appeared at all levels of court in both Alberta and Saskatchewan, as well as at the Supreme Court of Canada. Arif has experience in international arbitration and before administrative boards, including the Sport Dispute Resolution Centre of Canada. Arif has represented large multinational corporations, product manufacturers, entrepreneurs, professional athletes, national sports organizations, franchisees and franchisors, general contract...

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.

Ben Hudson is a top attorney recognized by Best Lawyers in the practice area(s) of Tax Law and Trusts and Estates. Ben, 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 Ben 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...

Alex practices general commercial and civil litigation and advises clients with respect to a broad range of individual and corporate disputes, including contractual disputes, insurance matters, and tort-based claims. She also has extensive experience in construction matters, particularly with builders’ liens and delay claims. Alex has represented clients in the Alberta Court of Justice (formerly Provincial Court) and the Court of King’s Bench of Alberta, as well as in commercial a...

Grant is recognized as a leading litigation lawyer by Chambers Canada , Lexpert , Best Lawyers , Benchmark Canada and others. He has been identified by Benchmark as one of the top 50 trial lawyers in Canada each year since 2020. He was inducted into Benchmark’s Litigation Hall of Fame in 2023 and is a Fellow of the Litigation Counsel of America. Grant is known as a fierce advocate who applies common sense to solve complex legal and business problems. He has the ability to pierce through...

Regina Corrigan is a partner in the Calgary office of the firm, head of the office's Business Law Department and practice group leader for its Intellectual Property Law Department. Regina's practice focuses on the areas of trademarks and technology commercialization. She has significant experience with all aspects of trademark law, including, prosecution, opposition, licensing and rights transfer in Canada. Regina also holds in-depth expertise in the commercialization and development of techn...

Kevin Keyes is a Partner in the firm’s Calgary office. His practice focuses on real estate development, financing and leasing. Kevin has advised clients with respect to land assembly; annexation; purchase; subdivision; rezoning; development approvals; financing; leasing; management and sale of commercial and institutional projects, and public/private-sector initiatives. Regularly assists clients in making strategic business decisions, negotiating and preparing complex commercial agreeme...

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...