Atty. Peter Ivan Ostroff

Atty. Peter Ivan Ostroff

Peter Ivan Ostroff is a lawyer practicing complex commercial litigation, international arbitration (commercial and treaty), trade secret and unfair competition litigation and 6 other areas of law. Peter received a B.A. degree from Washington University in 1964, and has been licensed for 59 years.

Los Angeles Los Angeles 59 Years Experience 59 year
Call (213) 784-3108

Profile Summary

About Peter Ivan Ostroff at a glance

Peter Ivan Ostroff is a Partner based in Los Angeles, California, practicing at Sidley Austin LLP. They have 59+ years of legal experience, licensed to practice since 1967. Their practice focuses on discrimination, employment, business, ip, and class action. Admitted to practice in Illinois (1967) and California (1970). Educated at The University of Chicago Law School (J.D., 1967) and Washington University (B.A., 1964). Recognitions include AV Preeminent. Serves clients in Los Angeles, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Peter Ivan Ostroff is a lawyer practicing complex commercial litigation, international arbitration (commercial and treaty), trade secret and unfair competition litigation and 6 other areas of law
  • Peter received a B.A. degree from Washington University in 1964, and has been licensed for 59 years
  • Peter practices at Sidley Austin LLP in Los Angeles, CA

Practice Areas Explained

Peter Ivan Ostroff's Areas of Practice

Each practice area below reflects the types of cases Peter Ivan Ostroff handles, with a brief overview of what that area of law covers.

Workplace Discrimination

Peter Ivan Ostroff is one of 6,573 discrimination attorneys indexed nationally. Browse discrimination attorneys in California →

Employment Law

Employment lawyers represent workers in wrongful termination, discrimination, harassment, wage & hour disputes, and severance negotiations.

Peter Ivan Ostroff is one of 151,622 employment attorneys indexed nationally. Browse employment attorneys in California →

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

Peter Ivan Ostroff is one of 452,854 business attorneys indexed nationally. Browse business attorneys in California →

Intellectual Property

IP attorneys protect inventions, brands, and creative work through patent prosecution, trademark registration, copyright, and trade-secret enforcement.

Peter Ivan Ostroff is one of 94,505 ip attorneys indexed nationally. Browse ip attorneys in California →

Class Action

Peter Ivan Ostroff is one of 23,998 class action attorneys indexed nationally. Browse class action attorneys in California →

Jurisdictional Context

Why local counsel matters in California

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

Looking for additional California attorneys? Browse all attorneys in Los Angeles or all attorneys in California.

Frequently Asked

Common questions about Peter Ivan Ostroff

Where is Peter Ivan Ostroff's law office located?
Peter Ivan Ostroff's law practice is located in Los Angeles, California. The firm is Sidley Austin LLP. You can contact the office directly through this profile page.
What practice areas does Peter Ivan Ostroff handle?
Peter Ivan Ostroff focuses on discrimination, employment, business, ip, class action. Each practice area listed reflects experience handling cases of that type in California.
How long has Peter Ivan Ostroff practiced law?
Peter Ivan Ostroff has 59+ years of legal experience and has been licensed since 1967.
Where did Peter Ivan Ostroff go to law school?
Peter Ivan Ostroff earned their education at (J.D., 1967); (B.A., 1964).
How can I contact Peter Ivan Ostroff for a consultation?
You can contact Peter Ivan Ostroff 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 Peter Ivan Ostroff received?
Peter Ivan Ostroff's notable recognition includes: AV Preeminent.

Education

J.D.
The University of Chicago Law School
- 1967
B.A.
Washington University
- 1964

Awards

AV Preeminent

Bar Admissions

Illinois
Admitted: 1967
California
Admitted: 1970

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