Atty. Jonathan Casillo Marquet

Atty. Jonathan Casillo Marquet

Jonathan Casillo Marquet is a lawyer practicing general commercial litigation, civil litigation, drug and medical device litigation and 1 other area of law. Jonathan Casillo received a B.S. degree from Northwestern University in 1998, and has been licensed for 25 years.

New York New York 25 yrs experience 25 year
Call (332) 529-6938 Book Appointment

Profile Summary

About Jonathan Casillo Marquet at a glance

Jonathan Casillo Marquet is an Associate based in New York, New York, practicing at Eiseman Levine Lehrhaupt & Kakoyiannis, P.C.. They have 25+ years of legal experience, licensed to practice since 2001. Their practice focuses on business, ip, and litigation. Admitted to practice in New Jersey (2001), New York (2002), US District Court, Southern District of New York (2006), and Minnesota (2008). Educated at Boston College (J.D., 2001) and Northwestern University (B.S. Mechanical, 1998). Active member of Minnesota State and Hennepin County Bar Associations Federal Bar Association Defense Research Institute Minnesota Defense Lawyers Association. Serands clients in New York, NY and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Jonathan Casillo Marquet is a lawyer practicing general commercial litigation, civil litigation, drug and medical device litigation and 1 other area of law
  • Jonathan Casillo received a B.S. degree from Northwestern University in 1998, and has been licensed for 25 years
  • Jonathan Casillo practices at Eiseman Levine Lehrhaupt & Kakoyiannis, P.C. in New York, NY

Practice Areas Explained

Jonathan Casillo Marquet's Areas of Practice

Each practice area below reflects the types of cases Jonathan Casillo Marquet 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.

Jonathan Casillo Marquet is one of 501,317 business attorneys indexed nationally. Browse business attorneys in New York →

Intellectual Property

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

Jonathan Casillo Marquet is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in New York →

Civil Litigation

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

Jonathan Casillo Marquet is one of 454,532 litigation attorneys indexed nationally. Browse litigation 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 Jonathan Casillo Marquet

Where is Jonathan Casillo Marquet's law office located?
Jonathan Casillo Marquet's law practice is located in New York, New York. The firm is Eiseman Levine Lehrhaupt & Kakoyiannis, P.C.. You can contact the office directly through this profile page.
What practice areas does Jonathan Casillo Marquet handle?
Jonathan Casillo Marquet focuses on business, ip, litigation. Each practice area listed reflects experience handling cases of that type in New York.
How long has Jonathan Casillo Marquet practiced law?
Jonathan Casillo Marquet has 25+ years of legal experience and has been licensed since 2001.
Where did Jonathan Casillo Marquet go to law school?
Jonathan Casillo Marquet earned their education at (J.D., 2001); (B.S. Mechanical, 1998).
How can I contact Jonathan Casillo Marquet for a consultation?
You can contact Jonathan Casillo Marquet 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.

Education

J.D.
Boston College
- 2001
B.S. Mechanical
Northwestern University
- 1998

Bar Admissions

New Jersey
Admitted: 2001
New York
Admitted: 2002
US District Court, Southern District of New York
Admitted: 2006
Minnesota
Admitted: 2008
US District Court, District of Minnesota
Admitted: 2008

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