John Mastoras
Canada Guide 2025
Band 2 : Employment & Labour
Email address
[email protected]Contact number
+1 416.216.3905Share profile
Band 2
About
Provided by John Mastoras
Practice Areas
John Mastoras is a senior partner in our Canadian employment and labour law group. He is known to clients as a passionate and dedicated advocate and business partner who provides innovative and practical advice.
John is frequently called upon to litigate highly contentious matters such as disruptive labour disputes and workplace mental health issues, and acts exclusively for employers in the broader area of labour and employment law. He regularly litigates and provides strategic advice in connection with labour arbitrations, labour relations board disputes, human rights proceedings, occupational health and safety charges, workers' compensation, labour injunctions and common law employment actions. His practice spans union and non-union workplaces for both federally and provincially regulated employers.
Chambers Review
Canada
John Mastoras is a highly regarded lawyer based in Toronto, who is particularly experienced in contentious labour and employment matters, including both litigation and arbitration. He is also skilled in collective bargaining negotiations.
Strengths
Provided by Chambers
"John is an amazing lawyer and litigator."
"John continues to deliver a superior level of service to myself and my team, is always responsive to our needs, and works to provide the most cost-effective solutions to our needs."
"John is extremely responsive and a really good strategic partner. He is very diligent and level-headed. Whenever he is on a file, the quality increases."
"His common sense approach to business is refreshing, presenting a risk-based approach with options for discussion."
"John is an amazing lawyer and litigator."
"John continues to deliver a superior level of service to myself and my team, is always responsive to our needs, and works to provide the most cost-effective solutions to our needs."
"John is extremely responsive and a really good strategic partner. He is very diligent and level-headed. Whenever he is on a file, the quality increases."
"His common sense approach to business is refreshing, presenting a risk-based approach with options for discussion."
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