Michael J. Diamondstein

Top rated Criminal Defense attorney in Philadelphia, Pennsylvania

Michael J. Diamondstein, P.C.
Michael J. Diamondstein
Michael J. Diamondstein, P.C.

Practice Areas: Criminal Defense, White Collar Crimes, DUI-DWI; view more

Licensed in Pennsylvania since: 1996

Education: Widener University – Delaware Law School

Selected to Super Lawyers: 2011 - 2023

Michael J. Diamondstein, P.C.

2 Penn Center, Suite 900
1500 JFK Boulevard
Philadelphia, PA 19102 Visit website


When you feel the intense heat of a Government investigation or you have been charged with a crime, you need a lawyer who is not afraid to stand up for you.  You need a lawyer who has been there.  Michael J. Diamondstein has been there for athletes, politicians, police officers and every day working Americans.

Mr. Diamondstein is a member of the Pennsylvania, New Jersey and federal Bars who has handled thousands upon thousands of criminal cases in state and federal courts throughout the United States. He has defended high-profile, media-sensitive cases as well as serious but unreported criminal cases. He has secured acquittals and dismissals for hundreds and hundreds of his previous clients. He is well respected in the legal community as he routinely represents clients who have been referred to him by judges, prosecutors, law enforcement officers and fellow attorneys.

Mr. Diamondstein's vast experience and demonstrated skill have been recognized by his peers and he has received the highest AV Preeminent rating from Martindale-Hubbell.  He is also qualified to handle death penalty cases under Pennsylvania Rule 801. Mr. Diamondstein is often asked to lecture to other lawyers at legal education seminars. This same level of experience and skill enables him to provide the highest standard of representation for anyone accused of crimes, under investigation or recently arrested.

Michael J. Diamondstein is a lifelong resident of the Philadelphia metropolitan area. A graduate of Ithaca College, Mr. Diamondstein attended Widener University School of Law, from which he graduated summa cum laude.

Practice areas

Criminal Defense, Criminal Defense: White Collar, Criminal Defense: DUI/DWI

Focus areas

Arrest & Arraignment, Assault & Battery, Criminal Domestic Violence, Criminal Fraud, Criminal Law, Criminal Law - Federal, Drug & Alcohol Violations, False Accusations, Felony, Juvenile Delinquency, Misdemeanor, Murder, Sex Offenses, Tax Evasion, Theft, White Collar Crime

  • 60% Criminal Defense
  • 30% Criminal Defense: White Collar
  • 10% Criminal Defense: DUI/DWI

First Admitted: 1996, Pennsylvania

Professional Webpage: https://michaeldiamondstein.com/attorney-profiles/michael-j-...

  • Addressed COVID court issues for attorneys., Panelist, Webinar, Criminal Justice Section, Philadelphia Bar Association, July 23rd, 2020
Educational Background:
  • Ithaca College, Ithaca, NY, B.S. in Business Management, May, 1992
Scholarly Lectures/Writings:
  • Illinois: An Oasis in the Middle of a Judicial Desert  Haudrich v. Homedica, 2 WIDENER SYMP. L. J. 331, 1997
  • On August 31st, 2022, Mr. Diamondstein addressed the American Judges Association Annual Conference regarding publishing a novel and the inspiration behind the same., Speaker, Featured Speaker, 2022 American Judges Association Annual Conference, 2022
  • Provided attorneys with an update on the status of Montgomery County, Bucks County, Delaware County, Chester County and the federal courts during the COVID-19 pandemic., Presenter, Four County Criminal Practice Update, Philadelphia Bar Association, 2020
  • Cloaked in Doubt, 2006
  • Instructor, NITA Program, Hofstra University School of Law, January, 2000
  • Judge, Regional Trial Competition, Temple University School of Law, February 2003 - Present
  • Instructor, Continuing Legal Educations Courses for Pennsylvania Bar Institute, 2009 - Present
  • On January 12th, 2017 Mr. Diamondstein was a panelist with Louis Lappen, Acting US Attorney for the Eastern District of PA and The Honorable Luis Felipe Restrepo of the Third Circuit Court of Appeals for a CLE course for criminal attorneys and prosecutors.  The topic was the difference between State and Federal Prosecutions with respect to coopeartors., Lecturer, CLE, Philadelphia Inn of Criminal Courts, 2017
  • On June 10th, 2017 Mr. Diamondstein spoke to the Arkansas Association of Criminal Defense Lawyers on the topic of How to Handle a High Profile Case at their summer meeting in Bossier City, Louisanna., Speaker, How to Handle a High Profile Case, 2017
  • Intensive Trial Advocacy Program, Instructor, Widener University School Of Law, 2017
  • Lecturer on Attorney Civility in the Courts, Lecturer, Philadelphia Inn Of Criminal Courts, 2018
Other Outstanding Achievements:
  • Multiple IRONMAN and long distance endurance events including but not limited to: IMLP, IMWI (2x), and Challenge AC, 2021
  • Was successful in convincing a federal judge to sign off on the release of Willie Stokes after he was wrongfully convicted and spent 38 years in prison for a murder that he didn't commit.  At the time of his release, Mr. Stokes was the longest serving exoneree in Pennsylvania state history., 2022
  • Ordained Minister, 2019
  • Audio of my closing argument in the acquital of Philadelphia Police Officer John Speiser.   http://www.bigtrial.net/2015/05/i-stood-up-for-hero-today.html, 2015
  • Song written about Michael Diamondstein by a rapper after he won a Murder trial: https://youtu.be/qWBYCREGLNs, 2016
  • You can watch the argument at https://www.youtube.com/watch?v=-zbwI3Up8rs.  The case argument begins at the 1:37 mark., Argued in the Pennsylvania Supreme Court, Commonwealth v. Alkiohn Dunkins, 2021
  • Profiled as a 5 star attorney by Surburban Life Magazine., 5 Star Attorney, Suburban Life Magazine, 2019
  • Because of COVID-19, Mr. Diamondstein gave the Commencement Address to a number of the members of the graduating class of the University of Wisconsin, Class of 2020 who were quarantined in Lower Merion at their ad hoc graduation ceremony., Unofficial Commencement Speaker, University of Wisconsin, Class of 2020, "Lower Merion Division", 2020
  • Received American Jurisprudence Awards and Certificate of Achievements in Criminal Procedure, Constitutional Law, Secured Transactions, Capital Punishment, Professional Responsibility and Wills and Trusts
  • Rated AV Preeminent every year since 2017, Rated AV Preeminent by Martindale Hubbell, Martindale Hubbell, 2023
  • Picked for Super Lawyers in the Criminal field every year since 2011, Super Lawyers selection
  • Wolcott Fellowship, Widener University School of Law
  • Awarded William I. Schaffer and Emily N. Maxwell Memorial Scholarships
Special Licenses/Certifications:
  • Certified to handle Capital Cases in the Commonwealth of Pennsylvania, 2022
  • P.A.D.I Advanced; Nitrox; and Wreck Diver, 2004
Bar/Professional Activity:
  • U.S. District Court, Western District of Pennsylvania, 2022
  • Member, Philadelphia Bar Association, Criminal Section, 2023
  • Federal Criminal Law Committee, EDPA since 2018, 2023
  • Member, Montgomery County Bar Association, 2023
  • Member, Pennsylvania Bar Association, 2023
  • Pro Hac Vice, U.S. District Court, Maryland, 2016
  • Pro Hac Vice, U.S. District Court, Eastern District of Tennessee, 2018
  • Pro Hac Vice, U.S. District Court, Eastern District of New York, 2012
  • Pennsylvania, 1996
  • U.S. District Court, District of New Jersey, 1997
  • Member, Pennsylvania Association of Criminal Defense Attorneys, 2023
  • Supreme Court of the United States, 2014
  • Pro Hac Vice, U.S. District Court, Delaware, 2017
  • Pro Hace Vice, U.S. District Court, Western District of Missouri, 2018
  • Lifetime Member, National Association of Criminal Defense Attorneys, 2023
  • U.S. Court of Appeals, Third Circuit, 2001
  • U.S. District Court, Middle District of Pennsylvania, 2012
  • Pro Hac Vice, State of Delaware, 2018
  • New Jersey, 1996
  • U.S. District Court, Eastern District of Pennsylvania, 2000
  • Master, Philadelphia Criminal Inn of Court, started in 2013, Founding Member, 2023
Pro bono/Community Service:
  • Elected Judge of Elections, Montgomery County, Lower Merion, District 13-3, 2022
  • Celebrity guest for the inaugural Vincera Foundation Fundraiser, 2017
  • Volunteer, Friendship Circle, 2020
  • Goalie coach for the Lower Merion Bulldogs Squirts Ice Hockey Team, 2016

Office location for Michael J. Diamondstein

2 Penn Center, Suite 900
1500 JFK Boulevard
Philadelphia, PA 19102

Phone: 215-940-2700


13 Years Super Lawyers
  • Super Lawyers: 2011 - 2023

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