Atty. Mark St. Cyr

Atty. Mark St. Cyr

Mark St. Cyr is a lawyer practicing construction, infrastructure, litigation.

Toronto Toronto 14 yrs experience 14 year
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Profile Summary

About Mark St. Cyr at a glance

Mark St. Cyr is an Associate based in Toronto, Ontario, practicing at Cassels Brock & Blackwell LLP. They have 14+ years of legal experience, licensed to practice since 2012. Their practice focuses on litigation. Admitted to practice in Ontario (2012). Educated at University of Western Ontario (J.D., 2011) and Simon Fraser University (B.A. Criminology, 2005). Serands clients in Toronto, ON and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mark St. Cyr is a lawyer practicing construction, infrastructure, litigation
  • Mark received a degree from Simon Fraser University in 2005, and has been licensed for 14 years
  • Mark practices at Cassels Brock & Blackwell LLP in Toronto, ON

Practice Areas Explained

Mark St. Cyr's Areas of Practice

Each practice area below reflects the types of cases Mark St. Cyr handles, with a brief overview of what that area of law covers.

Civil Litigation

Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.

Mark St. Cyr is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Ontario →

Jurisdictional Context

Why local counsel matters in Ontario

Practicing law in Ontario. Legal matters in Ontario are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Toronto are typically filed in the local municipal court or the appropriate Ontario state district court, depending on subject matter and amount in controversy. An attorney licensed in Ontario brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Ontario courts without local counsel or pro hac vice admission.

Looking for additional Ontario attorneys? Browse all attorneys in Toronto or all attorneys in Ontario.

Frequently Asked

Common questions about Mark St. Cyr

Where is Mark St. Cyr's law office located?
Mark St. Cyr's law practice is located in Toronto, Ontario. The firm is Cassels Brock & Blackwell LLP. You can contact the office directly through this profile page.
What practice areas does Mark St. Cyr handle?
Mark St. Cyr focuses on litigation. Each practice area listed reflects experience handling cases of that type in Ontario.
How long has Mark St. Cyr practiced law?
Mark St. Cyr has 14+ years of legal experience and has been licensed since 2012.
Where did Mark St. Cyr go to law school?
Mark St. Cyr earned their education at (J.D., 2011); (B.A. Criminology, 2005).
How can I contact Mark St. Cyr for a consultation?
You can contact Mark St. Cyr directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.

Education

J.D.
University of Western Ontario
- 2011
B.A. Criminology
Simon Fraser University
- 2005

Bar Admissions

Ontario
Admitted: 2012

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