Atty. Marc William O'Brien

Atty. Marc William O'Brien

Marc William O'Brien is a lawyer practicing financial markets and services, banking, commercial litigation and 3 other areas of law. Marc received a B.A. degree from Hope College in 1979, and has been licensed for 42 years.

Chicago Chicago 42 yrs experience 42 year
Call (412) 397-7278 Book Appointment

Profile Summary

About Marc William O'Brien at a glance

Marc William O'Brien is a Member based in Chicago, Illinois, practicing at Bronson & Kahn LLC. They have 42+ years of legal experience, licensed to practice since 1984. Their practice focuses on business, real estate, and litigation. Admitted to practice in Illinois (1984) and U.S. District Court, Northern District of Illinois including Trial Bar (1985). Educated at John Marshall Law School (J.D., 1984) and Hope College (B.A., 1979). Recognitions include Peer Reviewed. Serands clients in Chicago, IL and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Marc William O'Brien is a lawyer practicing financial markets and services, banking, commercial litigation and 3 other areas of law
  • Marc received a B.A. degree from Hope College in 1979, and has been licensed for 42 years
  • Marc practices at Bronson & Kahn LLC in Chicago, IL

Practice Areas Explained

Marc William O'Brien's Areas of Practice

Each practice area below reflects the types of cases Marc William 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.

Marc William O'Brien is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Illinois →

Real Estate Law

Real estate attorneys handle home purchases, sales, commercial transactions, title disputes, and landlord-tenant matters.

Marc William O'Brien is one of 316,149 real estate attorneys indexed nationally. Browse real estate attorneys in Illinois →

Civil Litigation

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

Marc William O'Brien is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Illinois →

Jurisdictional Context

Why local counsel matters in Illinois

Practicing law in Illinois. Legal matters in Illinois are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Chicago are typically filed in the local municipal court or the appropriate Illinois state district court, depending on subject matter and amount in controversy. An attorney licensed in Illinois 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 Illinois courts without local counsel or pro hac vice admission.

Looking for additional Illinois attorneys? Browse all attorneys in Chicago or all attorneys in Illinois.

Frequently Asked

Common questions about Marc William O'Brien

Where is Marc William O'Brien's law office located?
Marc William O'Brien's law practice is located in Chicago, Illinois. The firm is Bronson & Kahn LLC. You can contact the office directly through this profile page.
What practice areas does Marc William O'Brien handle?
Marc William O'Brien focuses on business, real estate, litigation. Each practice area listed reflects experience handling cases of that type in Illinois.
How long has Marc William O'Brien practiced law?
Marc William O'Brien has 42+ years of legal experience and has been licensed since 1984.
Where did Marc William O'Brien go to law school?
Marc William O'Brien earned their education at (J.D., 1984); (B.A., 1979).
How can I contact Marc William O'Brien for a consultation?
You can contact Marc William 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.
What awards or recognition has Marc William O'Brien received?
Marc William O'Brien's notable recognition includes: Peer Reviewed.

Education

J.D.
John Marshall Law School
- 1984
B.A.
Hope College
- 1979

Awards

Peer Reviewed

Bar Admissions

Illinois
Admitted: 1984
U.S. District Court, Northern District of Illinois including Trial Bar
Admitted: 1985

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