Atty. William John Nissen

Atty. William John Nissen

William John Nissen is a lawyer practicing alternative dispute resolution, securities and future regulatory, securities litigation and 2 other areas of law. William received a B.A. degree from Northwestern University, and has been licensed for 50 years.

Chicago Chicago 50 yrs experience 50 year
Call (224) 561-4652 Book Appointment

Profile Summary

About William John Nissen at a glance

William John Nissen is a Partner based in Chicago, Illinois, practicing at Sidley Austin LLP. They have 50+ years of legal experience, licensed to practice since 1976. Their practice focuses on securities, litigation, and adr. Admitted to practice in Illinois (1976), U.S. District Court, Northern District of Illinois (1976), U.S. Court of Appeals, Seventh Circuit (1980), and U.S. Court of Appeals, Ninth Circuit (1980). Educated at Harvard Law School (J.D., 1976) and Northwestern University B.A. (—). Recognitions include AV Preeminent. Active member of Chicago and American Bar Associations. Serands clients in Chicago, IL and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • William John Nissen is a lawyer practicing alternative dispute resolution, securities and future regulatory, securities litigation and 2 other areas of law
  • William received a B.A. degree from Northwestern University, and has been licensed for 50 years
  • William practices at Sidley Austin LLP in Chicago, IL

Practice Areas Explained

William John Nissen's Areas of Practice

Each practice area below reflects the types of cases William John Nissen handles, with a brief overview of what that area of law covers.

Securities Law

William John Nissen is one of 64,529 securities attorneys indexed nationally. Browse securities attorneys in Illinois →

Civil Litigation

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

William John Nissen is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Illinois →

Mediation & Arbitration

Mediators and arbitrators for civil, commercial, family, and employment dispute resolution.

William John Nissen is one of 73,906 adr attorneys indexed nationally. Browse adr 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 William John Nissen

Where is William John Nissen's law office located?
William John Nissen's law practice is located in Chicago, Illinois. The firm is Sidley Austin LLP. You can contact the office directly through this profile page.
What practice areas does William John Nissen handle?
William John Nissen focuses on securities, litigation, adr. Each practice area listed reflects experience handling cases of that type in Illinois.
How long has William John Nissen practiced law?
William John Nissen has 50+ years of legal experience and has been licensed since 1976.
Where did William John Nissen go to law school?
William John Nissen earned their education at (J.D., 1976); (—).
How can I contact William John Nissen for a consultation?
You can contact William John Nissen 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 William John Nissen received?
William John Nissen's notable recognition includes: AV Preeminent.

Education

J.D.
Harvard Law School
- 1976
Northwestern University B.A.
- In Progress

Awards

AV Preeminent

Bar Admissions

Illinois
Admitted: 1976
U.S. District Court, Northern District of Illinois
Admitted: 1976
U.S. Court of Appeals, Seventh Circuit
Admitted: 1980
U.S. Court of Appeals, Ninth Circuit
Admitted: 1980
U.S. District Court, Northern District of Illinois, including Trial Bar
Admitted: 1982
U.S. Tax Court
Admitted: 1987
U.S. Court of Appeals, Fifth Circuit
Admitted: 1989
U.S. Court of Appeals, District of Columbia Circuit
Admitted: 1996
U.S. Court of Appeals, Sixth Circuit
Admitted: 2000
U.S. Court of Appeals, Eleventh Circuit
Admitted: 2004

Reviews

5.0
1 Review
5 0
4 0
3 0
2 0
1 0
These reviews belong to platform users; they do not constitute advertisement or promotion for the attorney. Opinions are published for informational purposes only.

No reviews yet.