David R.J. Lefebvre

Colin is a partner in the Calgary office of Lawson Lundell. He is a member of the firm’s Business Law, Corporate Commercial, Corporate Finance & Securities and Mergers & Acquisitions Groups. His practice covers a broad range of commercial transactions, including the structuring and implementation of share and asset acquisitions, mergers, financings, and corporate reorganizations involving strategic acquirers, investors, vendors, entrepreneurs, family business owners, family offi...

PROFESSIONAL EXPERIENCE: Mr. Halt graduated as the gold medal recipient from the University of Saskatchewan in 1986 and in 1988-89 he had the honour of serving as a law clerk to Madam Justice Bertha Wilson of the Supreme Court of Canada. Following his clerkship, Mr. Halt relocated to Calgary and has since practised civil litigation, including insurance with an emphasis on professional liability, corporate commercial litigation, securities litigation, franchise litigation, insolvency, construc...

Jack maintains a broad commercial litigation practice with a focus on insolvency and restructuring, debtor-creditor remedies, real estate, banking, fraud, and energy-related matters. He advises companies, directors, shareholders, lenders, and accounting professionals on all aspects of insolvency and restructuring proceedings under the Companies’ Creditors Arrangement Act and the Bankruptcy and Insolvency Act , both in Canada and in cross-border contexts. Jack also has significant experi...

Kelly practices energy, commercial and securities litigation. He has extensive experience with claims in the oil & gas, construction, and securities industries. He acts as counsel for investment dealers, investment advisors and investors in securities regulation, investigation and enforcement matters, and other investment related claims. Kelly has argued cases at all levels of court in Alberta, the Tax Court of Canada, securities regulatory tribunals, and the Canadian Investment Regulator...

Gary has been practicing as a lawyer for more than 20 years and is the managing partner of Kirk Montoute Dawson LLP. Gary also has extensive training as a Mediator and has participated in numerous Mediation, Arbitration and Judicial Dispute Resolution hearings. In addition to the practice areas of Wills and Estates, Mediation and Family Law, Gary is also an experienced litigator. He has appeared before all levels of Court in Alberta. Currently, Gary’s practice is focused primarily on Es...

Katharine Zhang is a top attorney recognized by Best Lawyers in the practice area(s) of Trusts and Estates. Katharine, 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 Katharine is held by other top lawyers in the same geographic and legal practice area.

As a partner at JSS Barristers, Kajal’s practice primarily involves large and complex file management, organization, and analysis. Kajal has experience advocating claims on behalf of individuals, corporations, and groups of litigants. In her practice she works closely with her clients including individuals, in-house counsel and business groups. Kajal practices in most areas of civil litigation with a focus on oil and gas litigation, securities litigation, construction disputes, includin...

Carolyn maintains a corporate commercial practice with a focus on business transactions, including private and public mergers and acquisitions, private equity transactions, corporate reorganizations, and debt and equity financings. She also advises clients on corporate governance and general corporate and securities law matters. Carolyn regularly acts for Canadian and U.S. private equity firms and their portfolio companies, as well as clients in the energy sector, including midstream companie...

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...

Jason Wilkins, KC articled with Dunphy Best Blocksom LLP in 2001 and joined the partnership in 2010. Jason practices primarily in the area of employment and family law. Jason acts for both employers and employees and enjoys the perspective both bring. Jason is experienced in all facets of property disputes, spousal support, custody/access and child support. He has a particular interest in Hague Convention (international child abduction) cases. He also maintains a civil litigation practice inc...