Atty. John P. Sheridan

Atty. John P. Sheridan

John P. Sheridan is a lawyer practicing labor and employment, commercial litigation.

New York New York 32 yrs experience 32 year
Call (201) 305-0915 Book Appointment

Profile Summary

About John P. Sheridan at a glance

John P. Sheridan is an Attorney based in New York, New York, practicing at Marrinan & Mazzola Mardon, P.C.. They have 32+ years of legal experience, licensed to practice since 1994. Their practice focuses on employment, business, and litigation. Admitted to practice in Massachusetts (1994), New Jersey (1998), and New York (2001). Educated at Boston College Law School (J.D., 1994) and Harvard University (A.B., 1990). Serands clients in New York, NY and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • John P. Sheridan is a lawyer practicing labor and employment, commercial litigation
  • John received a A.B. degree from Harvard University in 1990, and has been licensed for 32 years
  • John practices at Marrinan & Mazzola Mardon, P.C. in New York, NY

Practice Areas Explained

John P. Sheridan's Areas of Practice

Each practice area below reflects the types of cases John P. Sheridan handles, with a brief overview of what that area of law covers.

Employment Law

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

John P. Sheridan is one of 169,120 employment attorneys indexed nationally. Browse employment attorneys in New York →

Business & Corporate Law

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

John P. Sheridan is one of 501,317 business attorneys indexed nationally. Browse business attorneys in New York →

Civil Litigation

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

John P. Sheridan 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 John P. Sheridan

Where is John P. Sheridan's law office located?
John P. Sheridan's law practice is located in New York, New York. The firm is Marrinan & Mazzola Mardon, P.C.. You can contact the office directly through this profile page.
What practice areas does John P. Sheridan handle?
John P. Sheridan focuses on employment, business, litigation. Each practice area listed reflects experience handling cases of that type in New York.
How long has John P. Sheridan practiced law?
John P. Sheridan has 32+ years of legal experience and has been licensed since 1994.
Where did John P. Sheridan go to law school?
John P. Sheridan earned their education at (J.D., 1994); (A.B., 1990).
How can I contact John P. Sheridan for a consultation?
You can contact John P. Sheridan 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 Law School
- 1994
A.B.
Harvard University
- 1990

Bar Admissions

Massachusetts
Admitted: 1994
New Jersey
Admitted: 1998
New York
Admitted: 2001

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