Atty. Thomas Mark Lewyn

Atty. Thomas Mark Lewyn

Thomas Mark Lewyn is a lawyer practicing corporate law. Thomas received a B.A. degree from Stanford University in 1952, and has been licensed for 69 years.

New York New York 69 yrs experience 69 year
Call (646) 797-2069 Book Appointment

Profile Summary

About Thomas Mark Lewyn at a glance

Thomas Mark Lewyn is a Retired Partner based in New York, New York, practicing at Simpson Thacher & Bartlett LLP. They have 69+ years of legal experience, licensed to practice since 1957. Their practice focuses on business. Admitted to practice in New York (1957). Educated at Columbia University Law School (LL.B., 1955) and Stanford University (B.A., 1952). Recognitions include AV Preeminent. Active member of The Association of the Bar of the City of New York New York State and American Bar Associations. Serands clients in New York, NY and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Thomas Mark Lewyn is a lawyer practicing corporate law
  • Thomas received a B.A. degree from Stanford University in 1952, and has been licensed for 69 years
  • Thomas practices at Simpson Thacher & Bartlett LLP in New York, NY

Practice Areas Explained

Thomas Mark Lewyn's Areas of Practice

Each practice area below reflects the types of cases Thomas Mark Lewyn 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.

Thomas Mark Lewyn is one of 501,317 business attorneys indexed nationally. Browse business 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 Thomas Mark Lewyn

Where is Thomas Mark Lewyn's law office located?
Thomas Mark Lewyn's law practice is located in New York, New York. The firm is Simpson Thacher & Bartlett LLP. You can contact the office directly through this profile page.
What practice areas does Thomas Mark Lewyn handle?
Thomas Mark Lewyn focuses on business. Each practice area listed reflects experience handling cases of that type in New York.
How long has Thomas Mark Lewyn practiced law?
Thomas Mark Lewyn has 69+ years of legal experience and has been licensed since 1957.
Where did Thomas Mark Lewyn go to law school?
Thomas Mark Lewyn earned their education at (LL.B., 1955); (B.A., 1952).
How can I contact Thomas Mark Lewyn for a consultation?
You can contact Thomas Mark Lewyn 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 Thomas Mark Lewyn received?
Thomas Mark Lewyn's notable recognition includes: AV Preeminent.

Practice Areas

Education

LL.B.
Columbia University Law School
- 1955
B.A.
Stanford University
- 1952

Awards

AV Preeminent

Bar Admissions

New York
Admitted: 1957

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