Atty. J William Ernstrom

Atty. J William Ernstrom

J William Ernstrom is a lawyer practicing insurance, contracts, construction and 3 other areas of law. J received a B.A. degree from Hamilton College in 1967, and has been licensed for 54 years.

Rochester Rochester 54 yrs experience 54 year
Call (585) 642-4902 Book Appointment

Profile Summary

About J William Ernstrom at a glance

J William Ernstrom is an Of Counsel based in Rochester, New York. They have 54+ years of legal experience, licensed to practice since 1972. Their practice focuses on contracts, litigation, insurance, and adr. Admitted to practice in New York U.S. District Court, Northern, Southern, Eastern and Western Districts of New York (1972) and Florida U.S. District Court, District of Connecticut U.S. Court of Appeals, Second Circuit U.S. Supr (1981). Educated at Cornell Law School (J.D., 1971) and Hamilton College (B.A., 1967). Recognitions include AV Preeminent. Active member of American Bar Association. Serands clients in Rochester, NY and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • J William Ernstrom is a lawyer practicing insurance, contracts, construction and 3 other areas of law
  • J received a B.A. degree from Hamilton College in 1967, and has been licensed for 54 years
  • J practices in Rochester, NY

Practice Areas Explained

J William Ernstrom's Areas of Practice

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

Contracts

J William Ernstrom is one of 76,762 contracts attorneys indexed nationally. Browse contracts attorneys in New York →

Civil Litigation

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

J William Ernstrom is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in New York →

Insurance Law

Insurance attorneys for coverage disputes, bad faith claims, denied claims, and policy disputes.

J William Ernstrom is one of 121,912 insurance attorneys indexed nationally. Browse insurance attorneys in New York →

Mediation & Arbitration

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

J William Ernstrom is one of 73,906 adr attorneys indexed nationally. Browse adr attorneys in New York →

Jurisdictional Context

Why local counsel matters in New York

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

Looking for additional New York attorneys? Browse all attorneys in Rochester or all attorneys in New York.

Frequently Asked

Common questions about J William Ernstrom

Where is J William Ernstrom's law office located?
J William Ernstrom's law practice is located in Rochester, New York. You can contact the office directly through this profile page.
What practice areas does J William Ernstrom handle?
J William Ernstrom focuses on contracts, litigation, insurance, adr. Each practice area listed reflects experience handling cases of that type in New York.
How long has J William Ernstrom practiced law?
J William Ernstrom has 54+ years of legal experience and has been licensed since 1972.
Where did J William Ernstrom go to law school?
J William Ernstrom earned their education at (J.D., 1971); (B.A., 1967).
How can I contact J William Ernstrom for a consultation?
You can contact J William Ernstrom 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 J William Ernstrom received?
J William Ernstrom's notable recognition includes: AV Preeminent.

Education

J.D.
Cornell Law School
- 1971
B.A.
Hamilton College
- 1967

Awards

AV Preeminent

Bar Admissions

New York U.S. District Court, Northern, Southern, Eastern and Western Districts of New York
Admitted: 1972
Florida U.S. District Court, District of Connecticut U.S. Court of Appeals, Second Circuit U.S. Supr
Admitted: 1981

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