Advertising Disclosure Email Disclosure
PDF version

John F. Deasy

Union Trust Building, Suite 700
501 Grant Street
Pittsburgh, PA 15219
(412) 803-1153
(412) 803-1188 - Fax

John practices in the firm's Casualty Department. He concentrates his practice in the area of general liability including premises liability; amusements, sports and entertainment liability; product liability; liquor liability; and trucking and transportation litigation. 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 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 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.  

Published Works

  • “Pennsylvania’s Relaxed Standard for Proving Intoxication in Civil Cases,” Defense Digest, December 2018, Vol. 24, No. 4


  • University of Pittsburgh School of Law, Pittsburgh, PA (J.D., 1991)

  • University of Pittsburgh, Pittsburgh, PA (B.A., 1987)

    Major: Political Science 

Past Employment Positions

  • Public Defender's Office, Venango County, Pennsylvania, Assistant Public Defender, 1992 -1994

Defense Digest Article December 10, 2018
Defense Digest, Vol. 24, No. 4, December 2018 By John F. Deasy, Esq.* Key Points: How to use blood alcohol content evidence in civil cases. When to hire a toxicologist expert. Questions the toxicologist expert needs to answer so blood..., 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. This publication is not intended to provide...


  • University of Pittsburgh School of Law (J.D., 1991)
  • University of Pittsburgh (B.A., 1987)

Bar Admissions

  • Pennsylvania, 1991
  • U.S. District Court Western District of Pennsylvania, 1991
  • U.S. Court of Appeals 3rd Circuit

Associations & Memberships

  • Allegheny County Bar Association

Honors & Awards

Year Joined Organization: 2002

Before you send this email please note:

You are attempting to send email, through a link on our website, to an attorney of Marshall Dennehey Warner Coleman & Goggin or an employee in our firm. Please note that your email may not be treated as confidential and does not create an attorney-client relationship. You should not rely upon the transmission of an email through this website if you are seeking to enter into such a relationship. Until such time as we have agreed to represent you, no information in your email will be treated as confidential. Please contact us directly by telephone at 1.800.220.3308 if it is your intent to seek legal counsel with our firm or convey confidential information.

If it is still your intent to send this email, knowing that it may not be treated as confidential, you may accept our terms of agreement by pressing "OK". If you choose not to accept these terms of agreement you may navigate away from this page by pressing "Cancel."