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Michael Mazzuca


Michael is a litigation, business, and construction infrastructure lawyer.

Michael has been involved in a broad range of complex litigation matters, business and finance transactions, and international work.  His law practice includes construction and construction lien litigation, employment and labour law, corporate and commercial law, and civil litigation.

Michael is tireless and dedicated advocate for his clients.  He approaches each case strategically and crafts litigation and resolutions innovatively.  His colleagues and opponents know him as a person that “hates to lose.”  He has been lead counsel on some of Canada’s leading precedent cases.  He has conducted many motions, injunctions, trials, and appeals before various courts and tribunals in Ontario including the Court of Appeal, Divisional Court, Superior Court of Justice, Human Rights Tribunal, and the Ontario Labour Relations Board, as well as private arbitrations.

Michael negotiates and litigates all forms of construction contracts including CCDC forms, EPC Contracts, Construction Service, General Contracting, and Management Project Agreements.  He is versed on all aspects of the Construction Act and construction lien litigation and various bond claims and remedies.  Michael acts on construction matters related to bankruptcy and insolvency matters.

Michael represents corporations, publicly traded companies, institutional clients, and trade unions.  He is also known to represent professional athletes, senior executives, and corporate directors.  He is counsel to various trust funds, boards of directors, and government entities including and municipalities.   His legal practice is largely based on previous client referrals.

Michael has developed an extensive renewable energy practice.  He has been legal counsel to some of the pioneer companies in the renewable energy sector.  He has negotiated various energy and power purchase agreements involving ground mount and rooftop solar, micro-grid energy, wind, storage energy, and biomass.   He has negotiated energy agreements involving various countries including the United Kingdom, Caribbean countries, South America, Europe, and the United States.  He is lead counsel for Canada’s first large scale energy storage project.

Michael has appeared and represented clients in various international forums including international government parliaments and organizations and international dispute resolutions forums.

Prior to starting Rousseau Mazzuca LLP, Michael was a lawyer at a large national firm.  He is often called upon as a commentator by various major media outlets.  He is a teacher and lecturer of law courses at the university level. He has been an author and contributor to construction and employment law texts and books.

Michael was a Rotary International Ambassadorial Scholar.  He was Valedictorian of his university class and Academic All Canadian.  He received the Lieutenant Governor Silver Medal for attaining the highest GPA.  He holds a Masters of Law Degree (Osgoode Hall Law School), Post-Graduate Diploma in Legal Studies (College of Law, Sydney), Bachelor of Laws (Melbourne Law School), Certificate of Canadian Qualification (NCA, University of Toronto Law School).  He has been called to the Bar in Ontario and New South Wales (Australia).

Michael was part of the Innocence Project (Australia) during his legal studies.  As a law student, he was also part of the legal team that represented defendants in the internationally critically known Pong Su (North Korea) shipping case (all acquitted) as well as the famous “Body in the Boot” criminal case, now a famous notorious documentary.

Michael played hockey in the Ontario Hockey League (London Knights, Kitchener Ranges) and received a NHL invitation tryout (Nashville Predators).  He played hockey for the University of New Brunswick and the Australian Ice Hockey League (Melbourne Ice, captain). He remains very active in the sporting community advocating for players’ rights and advises and litigates cases in the areas of sport violence, harassment and discrimination, and sport administration.

Other than law, Michael enjoys the real estate sector.  He continues to play sports and enjoys traveling and spending time with his family, including his two boys.



I work with a lot of law firms in the core. I’ve seen Rousseau Mazzuca grow from a few competent and friendly people to the diverse firm that they are now. Every addition to their team has added uniquely talented people that are both professional and friendly. Rousseau Mazzuca persistently challenges themselves to be better and it shows.

Brian Chambers

Very easy to speak with, very supportive and professional in handling my concerns. Definitely would recommend to my friends and family.



65 Queen St W, Suite 600
M5H 2M5, Toronto, Ontario
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