Atty. Mary Sum
Mary Sum is a lawyer practicing corporate law. Mary has been licensed for 19 years.
Corporate Law Attorney · 19+ Years Experience
Profile Summary
About Mary Sum at a Glance
Mary Sum is a business attorney. They have 19+ years of legal experience, licensed to practice since 2007. Admitted to practice in Ontario (2007). Educated at University of Ottawa (LL.B., 2006).
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About Mary Sum
- Mary Sum is a lawyer practicing corporate law
- Mary has been licensed for 19 years
- Mary practices in Toronto, ON
Practice Areas Explained
Mary Sum's Areas of Legal Practice
Each practice area below reflects the types of cases Mary Sum handles, with a practical overview of what that area of law involves and how it may apply to your situation.
Business & Corporate Law
Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.
Mary Sum is one of 497,491 business attorneys indexed nationally. Browse business attorneys →
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Professional Profile
Why Clients in Your Area Choose Mary Sum
Selecting an attorney is one of the most consequential decisions you can make when a legal matter arises. Below are the core qualities that distinguish Mary Sum's practice in the field of business.
Decade-Tested Legal Experience
Mary Sum brings 19+ years of hands-on legal practice — enough to have navigated the recurring fact patterns, procedural traps, and negotiation dynamics that shape case outcomes.
Focused Business Practice
Concentrating on business means Mary Sum's knowledge of relevant statutes, case law, and procedural nuances stays current — unlike generalist practices that spread attention across unrelated fields.
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