Atty. John-David Treumann

Atty. John-David Treumann

John-David Treumann is a lawyer practicing financial markets and services, banking & finance. John-David received a B.A. degree from Barndeis University in 1992, and has been licensed for 22 years.

Chicago Chicago 22 Years Experience 22 year
Call (312) 535-4941

Profile Summary

About John-David Treumann at a glance

John-David Treumann is an Associate based in Chicago, Illinois, practicing at Mayer Brown Llp. They have 22+ years of legal experience, licensed to practice since 2004. Their practice focuses on business. Admitted to practice in Illinois (2004). Educated at Loyola University Chicago School of Law (J.D., 2004) and Barndeis University (B.A., 1992). Serves clients in Chicago, IL and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • John-David Treumann is a lawyer practicing financial markets and services, banking & finance
  • John-David received a B.A. degree from Barndeis University in 1992, and has been licensed for 22 years
  • John-David practices at Mayer Brown LLP in Chicago, IL

Practice Areas Explained

John-David Treumann's Areas of Practice

Each practice area below reflects the types of cases John-David Treumann 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.

John-David Treumann is one of 452,854 business attorneys indexed nationally. Browse business 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 venue, 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 John-David Treumann

Where is John-David Treumann's law office located?
John-David Treumann's law practice is located in Chicago, Illinois. The firm is Mayer Brown Llp. You can contact the office directly through this profile page.
What practice areas does John-David Treumann handle?
John-David Treumann focuses on business. Each practice area listed reflects experience handling cases of that type in Illinois.
How long has John-David Treumann practiced law?
John-David Treumann has 22+ years of legal experience and has been licensed since 2004.
Where did John-David Treumann go to law school?
John-David Treumann earned their education at (J.D., 2004); (B.A., 1992).
How can I contact John-David Treumann for a consultation?
You can contact John-David Treumann 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.
Loyola University Chicago School of Law
- 2004
B.A.
Barndeis University
- 1992

Bar Admissions

Illinois
Admitted: 2004

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