William J. O'Keefe

Joyce is a leading labour and employment lawyer, known to both clients and opposing counsel for being meticulous in preparation and fearless in execution. Employers depend on Joyce to help address sensitive and consequential matters with a focused, disciplined approach that achieves results. Leveraging 30 years of labour relations experience in British Columbia and Alberta, Joyce represents clients before the Alberta Labour Relations Board, the B.C. Labour Relations Board, and the Canada Indu...

Mario Nigro is a partner in the Mergers & Acquisitions and Private Equity & Venture Capital Groups and a member of the firm’s Partnership Board. His practice focuses on mergers and acquisitions, financings and complex corporate reorganizations, and general business law. Mario has extensive experience working with private equity firms, search funds, independent sponsors, and venture capital firms on sophisticated transactions including acquisitions and dispositions. He has also w...

Koker Christensen is Co-Leader of Fasken’s Financial Services Group and has over 20 years’ experience helping financial services businesses achieve their business objectives. His practice focusses on corporate, transactional, and regulatory matters for insurers, insurance intermediaries, banks, credit unions, payments businesses, and fintechs. Koker’s areas of expertise include mergers and acquisitions (M&A), reinsurance transactions, corporate reorganizations, establish...

Ewen is a business, real estate, and construction lawyer. He has a special interest in assisting entrepreneurs from concept to maturity. He works collaboratively to find cost effective and far sighted solutions. He understands that legal problems can seriously impact a client’s business and personal life. He is experienced at finding the right strategy and legal pathway to successfully guide clients through these obstacles. Ewen has represented a wide variety of clients with diverse bus...

Every business is unique. Those facing litigation need counsel to craft strategies that are consistent with advancing their unique values, plans and goals. Whether that means dealing with a shareholder dispute, breaches of contract or protecting a company’s reputation, Brendan approaches problems in a customized manner that meets our clients’ distinct business objectives. Services Commercial litigation Shareholders’ oppression and derivative claims Real estate/development di...

Paul’s practice is restricted to medical negligence. He has settled or resolved more than $100 million in medical negligence claims on behalf of victims of medical mistake, including the 3 largest single payouts in physician negligence claims in Canada. He has been admitted to the bar in Ontario, Alberta and Nunavut. He represents individuals across Canada. Paul holds degrees in economics, law and a master’s degree in business administration all from the University of Western Onta...

Brad's practice focuses mainly in the areas of M&A, corporate and commercial transactions, and the structuring and governance of private business. Brad regularly advises clients on the organizing of business relationships, commercial contracts, and the purchase and sale of businesses. Brad has experience acting for clients in the technology, manufacturing, professional practices, agriculture, transportation and environmental sectors, amongst others. Brad has a broad corporate and commerci...

Derek Chiasson is a partner in our tax team. His principal focus is on domestic and international tax aspects of mergers and acquisitions, corporate finance and corporate reorganizations, for public and private corporations. He also regularly advises on tax disputes, commodity taxes and executive compensation. Derek leverages his broad experience to bridge tax, finance and legal aspects of the transactions and reorganizations he works on, while maintaining strong technical skills, attention t...

Brendan Brammall is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Commercial Litigation. Brendan, who practices law in Toronto, Ontario, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Brendan is held by other top lawyers in the same geographic and legal practice area.

Andrew Nathanson, KC focuses on complex commercial litigation and white collar crime. He is Co-Chair of Fasken’s Commercial Litigation Group in BC and Co-Leader of the firm’s national White Collar Defence and Investigations group. Andrew is a Fellow of the American College of Trial Lawyers and has been ranked as a leading litigator in diverse areas including corporate and commercial litigation, directors and officers' liability, securities litigation, public law and criminal defen...