Atty. Mark J. O'Brien

Atty. Mark J. O'Brien

Mark J. O'Brien is a lawyer practicing corporate/commercial, capital markets.

19 yrs experience 19 year
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Profile Summary

About Mark J. O'Brien at a glance

Mark J. O'Brien is a Partner, practicing at Davies Ward Phillips & Vineberg LLP. They have 19+ years of legal experience, licensed to practice since 2007. Their practice focuses on business. Admitted to practice in Ontario (2007). Educated at University of Toronto J.D. (—) and University of Prince Edward Island B.B.A. (—).

Verified attorney profile · Updated June 2026

About

  • Mark J. O'Brien is a lawyer practicing corporate/commercial, capital markets
  • Mark J. received a B.B.A. degree from University of Prince Edward Island, and has been licensed for 19 years
  • Mark J. practices at Davies Ward Phillips & Vineberg LLP in Toronto, ON

Practice Areas Explained

Mark J. O'Brien's Areas of Practice

Each practice area below reflects the types of cases Mark J. O'Brien handles, with a brief overview of what that area of law covers.

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

Mark J. O'Brien is one of 501,317 business attorneys indexed nationally. Browse business attorneys →

Frequently Asked

Common questions about Mark J. O'Brien

What practice areas does Mark J. O'Brien handle?
Mark J. O'Brien focuses on business. Each practice area listed reflects experience handling cases of that type in their licensed jurisdictions.
How long has Mark J. O'Brien practiced law?
Mark J. O'Brien has 19+ years of legal experience and has been licensed since 2007.
Where did Mark J. O'Brien go to law school?
Mark J. O'Brien earned their education at (—); (—).
How can I contact Mark J. O'Brien for a consultation?
You can contact Mark J. O'Brien 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

University of Toronto J.D.
- In Progress
University of Prince Edward Island B.B.A.
- In Progress

Bar Admissions

Ontario
Admitted: 2007

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