Atty. Alan Jay Sinsheimer

Atty. Alan Jay Sinsheimer

Alan Jay Sinsheimer is a lawyer practicing energy & utilities, securities & investment fraud, mergers & acquisitions and 10 other areas of law. Alan received a A.B. degree from Princeton University in 1978, and has been licensed for 44 years.

New York New York 44 yrs experience 44 year
Call (347) 315-5280 Book Appointment

Profile Summary

About Alan Jay Sinsheimer at a glance

Alan Jay Sinsheimer is a Partner based in New York, New York, practicing at Sullivan And Cromwell Llp. They have 44+ years of legal experience, licensed to practice since 1982. Their practice focuses on business, m&a, securities, consumer, and energy. Admitted to practice in New York (1982). Educated at New York University School of Law (J.D., 1981) and Princeton University (A.B., 1978). Recognitions include AV Preeminent. Serands clients in New York, NY and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Alan Jay Sinsheimer is a lawyer practicing energy & utilities, securities & investment fraud, mergers & acquisitions and 10 other areas of law
  • Alan received a A.B. degree from Princeton University in 1978, and has been licensed for 44 years
  • Alan practices at Sullivan & Cromwell LLP in New York, NY

Practice Areas Explained

Alan Jay Sinsheimer's Areas of Practice

Each practice area below reflects the types of cases Alan Jay Sinsheimer 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.

Alan Jay Sinsheimer is one of 501,317 business attorneys indexed nationally. Browse business attorneys in New York →

Mergers & Acquisitions

Alan Jay Sinsheimer is one of 49,731 m&a attorneys indexed nationally. Browse m&a attorneys in New York →

Securities Law

Alan Jay Sinsheimer is one of 64,529 securities attorneys indexed nationally. Browse securities attorneys in New York →

Consumer Protection

Consumer protection attorneys for fraud, lemon law, debt harassment, and deceptive trade practices.

Alan Jay Sinsheimer is one of 50,607 consumer attorneys indexed nationally. Browse consumer attorneys in New York →

Energy & Utilities Law

Energy attorneys for oil & gas, renewables, utility regulation, and energy sector transactions.

Alan Jay Sinsheimer is one of 36,230 energy attorneys indexed nationally. Browse energy 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 New York 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 New York or all attorneys in New York.

Frequently Asked

Common questions about Alan Jay Sinsheimer

Where is Alan Jay Sinsheimer's law office located?
Alan Jay Sinsheimer's law practice is located in New York, New York. The firm is Sullivan And Cromwell Llp. You can contact the office directly through this profile page.
What practice areas does Alan Jay Sinsheimer handle?
Alan Jay Sinsheimer focuses on business, m&a, securities, consumer, energy. Each practice area listed reflects experience handling cases of that type in New York.
How long has Alan Jay Sinsheimer practiced law?
Alan Jay Sinsheimer has 44+ years of legal experience and has been licensed since 1982.
Where did Alan Jay Sinsheimer go to law school?
Alan Jay Sinsheimer earned their education at (J.D., 1981); (A.B., 1978).
How can I contact Alan Jay Sinsheimer for a consultation?
You can contact Alan Jay Sinsheimer 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 Alan Jay Sinsheimer received?
Alan Jay Sinsheimer's notable recognition includes: AV Preeminent.

Education

J.D.
New York University School of Law
- 1981
A.B.
Princeton University
- 1978

Awards

AV Preeminent

Bar Admissions

New York
Admitted: 1982

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