Executive Summary
Mattison Chinneck is a seasoned litigation lawyer with nearly a decade of experience representing both private companies and public-sector clients. He has served as primary counsel on complex legal matters, navigating high-stakes disputes with a blend of strategic litigation, creative problem-solving, and a strong focus on client outcomes. Clients value his practical, results-oriented approach, rooted in clear communication, efficiency, and proactive risk management.
Mattison routinely advises management on matters involving grievance arbitrations, collective bargaining, human rights, and privacy. He works closely with employers to find pragmatic, efficient solutions to a wide range of workplace issues, including disciplinary action, workplace investigations, and employment terminations. He regularly appears before courts and administrative bodies throughout Ontario, including the Ontario Court of Justice, the Ontario Labour Relations Board, the Human Rights Tribunal of Ontario, and the Ontario Law Enforcement Complaints Agency.
A significant part of Mattison’s practice has focused on internal investigations. During his five years with the Toronto Police Service, he worked closely with the Professional Standards Division, supporting and advancing sensitive investigations into officer conduct and organizational compliance. That experience deepened his understanding of accountability processes and how to properly and expediently conduct an investigation into workplace misconduct.
