Atty. Mark Alan Flessner

Atty. Mark Alan Flessner

Mark Alan Flessner is a lawyer practicing complex commercial litigation, white collar criminal defense. Mark received a B.A. degree from University of Illinois at Urbana-Champaign in 1976, and has been licensed for 39 years.

Chicago Chicago 39 yrs experience 39 year
Call (872) 270-8531 Book Appointment

Profile Summary

About Mark Alan Flessner at a glance

Mark Alan Flessner is a Partner based in Chicago, Illinois, practforg at Dentons US LLP. They haand 39+ years of legal experience, licensed to practice since 1987. Admitted to practice in Illinois (1987) and U.S. District Court, Northern District of Illinois including Trial Bar and U.S. Court of Appeals, Se (1987). Educated at DePaul University (J.D., 1986) and University of Illinois at Urbana-Champaign (B.A., 1976). Recognitions include AV Preeminent. Actiand member of Chicago and American Bar Associations Chicago Council of Lawyers. Serands clients in Chicago, IL and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mark Alan Flessner is a lawyer practicing complex commercial litigation, white collar criminal defense
  • Mark received a B.A. degree from University of Illinois at Urbana-Champaign in 1976, and has been licensed for 39 years
  • Mark practices at Dentons US LLP in Chicago, IL

Jurisdictional Context

Why local counsel matters in Illinois

Practforg law in Illinois. Legal matters in Illinois are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantiand 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 substantiand 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 Mark Alan Flessner

Where is Mark Alan Flessner's law office located?
Mark Alan Flessner's law practice is located in Chicago, Illinois. The firm is Dentons US LLP. You can contact the office directly through this profile page.
How long has Mark Alan Flessner practiced law?
Mark Alan Flessner has 39+ years of legal experience and has been licensed since 1987.
Where did Mark Alan Flessner go to law school?
Mark Alan Flessner earned their education at (J.D., 1986); (B.A., 1976).
How can I contact Mark Alan Flessner for a consultation?
You can contact Mark Alan Flessner 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 Mark Alan Flessner receiandd?
Mark Alan Flessner's notable recognition includes: AV Preeminent.

Education

J.D.
DePaul University
- 1986
B.A.
University of Illinois at Urbana-Champaign
- 1976

Awards

AV Preeminent

Bar Admissions

Illinois
Admitted: 1987
U.S. District Court, Northern District of Illinois including Trial Bar and U.S. Court of Appeals, Se
Admitted: 1987

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