Jason E. Sweeney

Katherine Stys is a top attorney recognized by Best Lawyers in the practice area(s) of Health Care Law and Medical Negligence. Katherine, who practices law in Calgary, Alberta, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Katherine is held by other top lawyers in the same geographic and legal practice area.

Jennifer McPherson is a corporate and commercial lawyer focusing on corporate finance and securities, mergers and acquisitions, and general corporate and commercial matters. Jennifer has acted for private and public companies on a broad range of matters, including public offerings, private placements, plans of arrangement, and asset and share purchase and sale transactions. She has also advised clients on stock exchange listings, continuous disclosure matters, and corporate governance issues.

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...

Brad’s practice is focused on mergers and acquisitions, private equity, start-ups and corporate / commercial matters. Brad is known for providing pragmatic and timely legal advice to public and private companies on a broad range of complex transactions. Brad has extensive experience assisting strategic and financial acquirers and sellers with both domestic and international mergers and acquisitions. In respect of his cross-border M&A experience he advises on transactions throughout ...

Ryan Mullins is a top attorney recognized by Best Lawyers in the practice area(s) of Insurance Law and Personal Injury Litigation. Ryan, 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 Ryan is held by other top lawyers in the same geographic and legal practice area.

Melissa became a member of the Law Society of Alberta in 2004. After her articles, Melissa participated in a Canadian Bar Association internship in Tanzania. During this internship, she assisted the Legal and Human Rights Centre in Dar es Salaam with promoting awareness on various critical human rights issues. Melissa joined Carbert Waite LLP in 2006, and became a partner in 2017. Melissa practices in all areas of civil and commercial litigation. Melissa’s primary practice areas are emp...

Lara Mason’s practice encompasses a wide range of commercial litigation matters, including commercial disputes, transnational and cross-border disputes, professional liability matters, insurance coverage disputes and class actions. Ms. Mason has appeared at all levels of court in Alberta, before the Supreme Court of Canada, and before the Alberta Utilities Commission. She has also participated in a variety of alternative dispute resolution processes.Ms. Mason joined our Calgary office a...

Aaron Martens, KC is a family law practitioner, mediator, arbitrator and Registered Collaborative Family Lawyer. He joined Dunphy Best Blocksom LLP in 1998 and is a partner in the firm. Aaron’s experience in family law matters includes being counsel on a wide variety of family and special chambers applications. He has represented clients in trials at Provincial Court and the King's Counsel, and has made appearances at the Court of Appeal of Alberta. Aaron also does adoption work. Aaron ...

Tamasine Davies has been a family law lawyer for over 30 years. Tamasine is the Managing Partner at Soby Boyden Lenz. She has been with Soby Boyden Lenz since 1994. Tamasine earned her Bachelor of Arts from the University of Alberta in 1991. She attended Dalhousie University, in Nova Scotia, Halifax from 1991 to 1994 earning her Law Degree. Her past work experience includes legal research on Aboriginal Treaty Rights and issues and facilitating Confederacy and Chiefs’ Conferences. Tamasi...

Sony Gill is a partner in the Capital Markets and Mergers & Acquisitions Groups. His practice focuses on public and private company creation, growth, restructuring and value maximization. He has extensive experience in the negotiation, structuring and consummation of a broad range of corporate finance, securities and M&A transactions, including public and private debt and equity financings, strategic investments, joint ventures, recapitalizations, restructurings, takeover bids, revers...