Merredith MacLennan

Michael is a Certified Specialist in Criminal Law and a partner at Abergel Goldstein & Partners LLP . Michael’s laid-back charm disarms the toughest witnesses and has an irresistible effect on judges and juries alike. Michael has developed a broad-ranging criminal litigation practice, and has appeared before all levels of court. He has defended cases ranging from simple assaults to large drug projects, to complex murders, and has had particular success before juries. Michael has bee...

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

Susan D. Mitchell proudly hails from North Bay, Ontario and continues to provide legal services in Northern Ontario as well as Eastern Ontario. Susan works primarily in our Ottawa office, but also travels to our locations in Cornwall, North Bay, and Kingston as needed to meet with clients on personal injury matters. Susan began practicing in 2002 and has been a Partner at Tierney Stauffer LLP since 2007. She became Managing Partner in 2018. Susan practices civil litigation, focusing on person...

Donald Dow is a partner in the firm's Ottawa office practising in the advocacy department. Donald’s practice is focused in the area of medical defence litigation, health law and professional disciplinary proceedings. Donald has over 17 years of experience in malpractice litigation, medical device/instruments liability claims, class actions and has handled numerous civil trials. He has appeared as counsel at the Ontario Court of Appeal and the Supreme Court of Canada. Donald heads our Ot...

Marta Siemiarczuk is a Partner and Head of the Family Law Group of Nelligan Law. Marta is a lawyer and arbitrator and practices in the areas of Family Law and Collaborative Family Law, Estates and Civil Litigation. Marta has acted as a co-instructor at the University of Ottawa, Faculty of Law, for Civil Procedure and the Alternative Dispute Resolution Program. She is a regular guest lecturer at the University of Ottawa in Family Law. Marta is also a regular columnist on various family law top...

Mark Josselyn is a partner in the firm's Ottawa office and the Ottawa group leader of the Firm's Employment and Labour Law National Practice Group. His practice focuses in the areas of employment law, insurance defence and commercial litigation Mark is an advocate before the Ontario Superior Court of Justice, the Ontario Court of Appeal and before various tribunals, including the Human Rights Tribunal of Ontario. He has significant training and experience in mediation and other conflict resol...

Derek Keay is a partner in the firm’s Ottawa office. Derek practises corporate law with an emphasis on corporate finance and mergers and acquisitions, primarily involving emerging technology companies. His primary focus is on providing advice to Canadian and international companies, together with angel, venture capital and institutional investors in relation to debt and equity financing transactions. He also has extensive experience in advising companies, shareholders and acquirers in c...

Marion Bailey-Canham is a top attorney recognized by Best Lawyers in the practice area(s) of Intellectual Property Law. Marion, who practices law in Ottawa, Ontario, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Marion is held by other top lawyers in the same geographic and legal practice area.

Will Boyer is a top attorney recognized by Best Lawyers in the practice area(s) of Intellectual Property Law. Will, who practices law in Ottawa, Ontario, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Will is held by other top lawyers in the same geographic and legal practice area.

Lynn practises in all aspects of labour and employment and human rights law, on behalf of management. After graduating from the University of Toronto Law School (JD, 1975), he practised for 11 years with a national law firm, before co-founding Emond Harnden in 1987. His practice encompasses the representation of both public and private sector clients with a focus on education, healthcare and technology. Lynn has managed a number of landmark cases in the areas of employee absenteeism, employee...