Skip to content

Affleck Greene McMurtry LLP | Barristers

Masiel A. Matus

Masiel A. Matus

Masiel A. Matus

Masiel has a broad commercial litigation practice and represents both national and international clients in a variety of complex matters. Masiel has experience litigating cases involving professional negligence, commercial leasing and real property disputes, insurance, contract disputes, shareholder disputes, fraud, breach of fiduciary duty, breach of trust, employment matters and defamation claims.


  • Represents investment dealers, financial advisors and other market participants in civil investor loss cases, in regulatory proceedings before the Mutual Fund Dealers Association of Canada (MFDA), and defends prosecutions under the Securities Act brought on behalf of the Ontario Securities Commission (OSC) by the Joint Serious Offences Team (JSOT).
  • Represents closely held corporations involved in various disputes, including oppression claims, as well as directors and officers sued in their personal capacity.
  • Represents owners of commercial real estate in property disputes, including environmental contamination claims.
  • Represents employers and employees/ independent contractors in employment law disputes.
  • While attending law school, Masiel participated in various advocacy and dispute resolution competitions and was a semi-finalist in the Canadian Client Consultation Competition.
  • Masiel was a civil division leader and a caseworker for the University of Ottawa Community Legal Clinic. Masiel was also co-president of the Criminal Law Students Association.
  • Earned a range of awards and scholarships for academic achievement.
  • Fluent in Spanish.
  • Masiel is a food and wine enthusiast and has achieved the Wine & Spirit Education Trust (WSET) Level 3 Award in Wines with Merit and Distinction.

Practice Areas

  • Corporate and Commercial Litigation
  • Class Action Litigation
  • Securities Litigation
  • Shareholder & Partnership Disputes

Other Practice Areas

Show More Practice Areas
  • Civil Litigation
  • Employment Law Disputes


  • Associate, Affleck Greene McMurtry LLP, 2013-Present
  • Called to the Bar, Ontario, 2013
  • Student-at-Law, Affleck Greene McMurtry LLP, 2012-2013
  • Civil division leader and caseworker, University of Ottawa, Community Legal Clinic, 2011-2012
  • Teaching Assistant, Intensive Alternative Dispute Resolution Program, University of Ottawa, 2010-2011
  • Courtroom Clerk/Registrar, Ontario Court of Justice, 2008-2010
  • Client Services Representative, Ontario Court of Justice, 2007


  • Juris Doctor, University of Ottawa Faculty of Law, 2012
  • Bachelor of Arts with Honours in Criminology, graduated Cum Laude, member of the Dean's Honour Role, York University, 2009

Memberships & Associations

  • Member of the Law Society of Ontario
  • Member of the Advocates' Society