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Marshall DenneheyShare Holder
John F. Deasy
Pro

John F. Deasy

4.5
13 reviews

501 Grant Street, Suite 700, Pittsburgh, PA 15219

Amusements, Sports & Recreation Liability, General Liability, Product Liability and 2 more

About John F. Deasy

John practices in the firm's Casualty Department. He concentrates his practice in the area of general liability including premises liability, product liability, construction accident and defects, fire and explosions, amusements, sports and entertainment liability, liquor liability, auto, and trucking and transportation litigation. Additionally, John has experience in cases involving elevators, escalators, moving walkways, electronic doorways, cranes and lifts.

An active trial attorney since 1992, he has represented property owners and managers of large shopping malls, sports and entertainment centers, amusement parks, stadiums, arenas, office buildings, residential complexes, hotels, bars and restaurants.

John has represented project owners, contractors, trucking companies, bus companies, highway contractors and parking garage owners and operators along with product manufacturers, distributors and retailers including department stores. He has also represented many small business owners such as barber shops, auto repairs shops and sub-contractors.

John has practiced and tried cases in many of the state courts in western Pennsylvania and federal court. John received a Bachelor of Arts in Political Science from the University of Pittsburgh in 1987. In 1991, he received his juris doctor from the University of Pittsburgh School of Law.

Honors & awards

AV Preeminent by Martindale-Hubbell

The Best Lawyers in America, Personal Injury Litigation - Defendants; Product Liability Litigation - Defendants
2025-2026

Pennsylvania Super Lawyers
2017-2019

Year joined

2002

Thought Leadership

98 Marshall Dennehey Attorneys Recognized in the 2026 Editions of The Best Lawyers in America and the Best Lawyers: Ones to Watch in America

August 20, 2025
Marshall Dennehey is proud to highlight the firm’s 98 attorneys who have been recognized in the 2026 editions of The Best Lawyers in America and the Best Lawyers: Ones to Watch in America. Less than 6% of all practicing lawyers in the U.S.

Pennsylvania’s Relaxed Standard for Proving Intoxication in Civil Cases

Pittsburgh
General Liability
Hospitality & Liquor Liability
December 10, 2018
Key Points: Defense Digest, Vol. 24, No. 4, December 2018. Defense Digest is prepared by Marshall Dennehey Warner Coleman & Goggin to provide information on recent legal developments of interest to our readers.

Classes/ Seminar Taught

Defending Roller Skating Claims, Roller Skating Association (RSA) Chapter Meeting, Pittsburgh, PA, October 24,, 2022

 

John F. Deasy (Pittsburgh, Pennsylvania) View website

Awards

AV Preeminent Peer Rated
This elite award is granted to attorneys who have been recognized by their peers for their very high ethical standards, with an average peer review score of 4.5 or higher.
Martindale-Hubbell Peer AV

Client Champion Awards

Client Champion awards recognize those attorneys who excel at service as affirmed by their clients. The awards, based on the quantity and quality of an attorney’s Martindale-Hubbell client reviews, demonstrate an ongoing commitment to delivering excellent client service. Award recipients stand out from their peers with a platinum, gold or silver icon.

Champion Badge Silver

At least three reviews and a score of 4.0 or higher.

Champion Badge Gold

At least six reviews and a score of 4.2 or higher.

Champion Badge Platinum

At least ten reviews and a score of 4.5 or higher.

Martindale Peer Awards

A lawyer who receives a minimum threshold of qualifying responses from fellow attorneys can qualify for one of three prestigious Martindale-Hubbell Peer Review Ratings:

Martindale-Hubbell Peer AV Preeminent Rating

AV Preeminent®: The highest peer rating standard. This rating signifies a large number of the lawyer’s peers rank him or her at the highest level of professional excellence for their legal knowledge, communication skills and ethical standards.

John F. Deasy got this award in 2021

Martindale-Hubbell Peer Distinguished Rating

Distinguished: An excellent rating for a lawyer with some experience. This rating indicates the attorney is widely respected by their peers for high professional achievement and ethical standards.

Martindale-Hubbell Peer Notable Rating

Notable: This rating indicates that the lawyer has been recognized by a large number of their peers for strong ethical standards.

Avvo Awards

Avvo Top Contributor

Avvo Top Contributor: The Avvo Top Contributor Award is granted to attorneys who have earned significant contribution points in a given year on our sister site, Avvo.com. Contribution points are earned by answering questions in Q&A, publishing Legal Guides, and other useful contributions to the Avvo community.

Avvo Client Choice

Avvo Client’s Choice: The Avvo Client's Choice Award Badge is granted to attorneys with a significant number of 4+ star reviews in a given year.

Reviews for John F. Deasy

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Overall Rating
4.5
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13
Lawyers.com
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4.5
Martindale
13
Avvo
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Services

Areas of Law

  • Other 5
    • Amusements, Sports & Recreation Liability
    • General Liability
    • Product Liability
    • Hospitality & Liquor Liability
    • Trucking & Transportation Liability

Practice Details

  • Firm Information
    Position
    Shareholder
    Firm Name
    Marshall Dennehey
  • Representative Cases & Transactions
    Cases
    Published Works: Pennsylvania's Relaxed St
    ard for Proving Intoxication in Civil Cases, Defense Digest, December 2018, Vol. 24, No. 4

Experience

  • Bar Admission & Memberships
    Admissions
    1991, Pennsylvania
    1991, U.S. District Court Western District of Pennsylvania
    U.S. Court of Appeals 3rd Circuit
    Memberships

    Associations & Memberships

    Allegheny County Bar Association

  • Education & Certifications
    Law School
    University of Pittsburgh School of Law, Pittsburgh, Pennsylvania
    Class of 1991
    J.D.
    Other Education
    University of Pittsburgh
    Class of 1987
    B.A.
    Political Science

Contact John F. Deasy

Share Holder at Marshall Dennehey
4.5
13 reviews

Union Trust Building, 501 Grant Street, Suite 700Pittsburgh, PA 15219U.S.A.

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Fax: (412) 803-1188

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Attorneys FAQs

  • What year was this attorney first admitted to the bar?
    John F. Deasy was admitted in 1991 to the State of Pennsylvania.
  • Is this attorney admitted to practice in any U.S. Federal Courts?
    John F. Deasy is admitted to practice before the United States Court of Appeals for the Third Circuit and United States District Court for the Western District of Pennsylvania.
  • Is this attorney Martindale-Hubbell Peer Review rated?
    Yes, John F. Deasy has a 4.5 Peer Rating from Martindale-Hubbell.
  • What law school did this attorney attend?
    John F. Deasy attended University of Pittsburgh School of Law, Pittsburgh, Pennsylvania.

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