Jack L. Gruenstein - Marshall Dennehey Warner Coleman & Goggin, P.C.

Jack L. Gruenstein

Listed in Best Lawyers since 2009
Phone: 215-575-2768

As special counsel to Marshall Dennehey Warner Coleman & Goggin, Jack leads the firm's white collar defense practice and assists our health care, privacy and professional liability clients with responses to government audits, grand jury and regulatory investigations and prosecutions. Jack also can assist our clients in conducting internal investigations.

As a trial lawyer, Jack has handled more than 50 criminal and civil jury trials and a substantial number of non-jury cases. He has represented many corporate employees and officers, as well as physicians in state and federal courts.

Jack handles complex matters. In one instance, he represented a client who was owed substantial fees by an insurance company that was placed into rehabilitation and then liquidated by the Pennsylvania Insurance Commissioner. After protracted litigation in the Commonwealth Court of Pennsylvania, the matter was resolved in favor of Jack’s client.

Jack attended Temple University in Philadelphia, Pennsylvania, where in 1973 he earned his Bachelor of Arts, cum laude. He then went on to earn his juris doctor from Temple University School of Law in 1976, also graduating cum laude. While in law school, Jack was a member of the Temple Law Review.

Following graduation from law school, Jack was a trial attorney for three years with the Bureau of Investigations and Enforcement of the Interstate Commerce Commission. During this period, Jack brought various enforcement actions against individuals and companies involved in the surface transportation industry. Jack then worked for two years as an associate with a prominent civil and criminal litigation firm in Philadelphia, Pennsylvania, after which he established a successful civil and criminal practice that he operated as a sole practitioner for almost 20 years. Jack left solo practice to become a partner in the white collar criminal boutique firm and, after more than eight years, left to join our firm.

Jack is currently a member of the America Israel Public Affairs Committee and its Philadelphia area Leadership Council. He is also a member of the Pennsylvania Criminal Defense Lawyers. Jack has also been awarded an AV® Preeminent™ by LexisNexis Martindale-Hubbell, which identifies the fact that a lawyer's peers rank him or her at the highest level of professional excellence.

Temple UniversityBA 1973Temple UniversityJ.D. 1976
America Israel Public Affairs CommitteeFederal Bar AssociationThe Philadelphia Leadership Council

Case History

United States v. Rooney — Successfully defended an AFSCME District Council Vice President accused of embezzlement from a union hospital in a multiple-defendant, six-week trial resulting in the only acquittal in the case.
Bass v. County of Wayne, et. al. — In this malicious prosecution/civil rights case in Detroit, Michigan, was part of the trial team that obtained the then highest damages award to date awarded by a Michigan jury.
Wright v. PHA — A jury verdict was obtained in a reverse-discrimination civil rights suit on behalf of an employee of the Philadelphia Housing Authority.
Commonwealth v. Eric Grier — Represented a defendant accused of first degree murder and conspiracy to murder and whose death sentence was reversed by the Pennsylvania Supreme Court because of an improper instruction on accomplice liability for the crime of first degree murder. As a result of the reversal, the proper standard of accomplice liability for first degree murder was clarified.
Represented physician during investigation by the Nuclear Regulatory Commission — Successfully represented a physician during an investigation by the Nuclear Regulatory Commission, and committees of the United States Senate and the United States House of Representatives, into the administering of prostate cancer radiation therapy at the Philadelphia Veterans Administration Medical Center.

Office Location

2000 Market Street, Suite 2300
Philadelphia, PA 19103
United States

Practice Areas

Criminal Defense: White-Collar