Jonathan F Marshall

Managing partner of the Law Offices of Jonathan F. Marshall, a New Jersey criminal and DWI defense law firm with offices in Morristown and Parsippany.  Mr. Marshall has been defending individuals charged with drug offenses, assault crimes, theft offenses, DWI, domestic violence, and other charges for over twenty years. This experience has included years of prosecution experience which ended when the state adopted a law precluding prosecutors from also providing defense representation in those Counties where they prosecute. Mr. Marshall thereafter limited his criminal practice to defending those accused of criminal, DWI and traffic offenses. He appears in County Superior Court and Municipal Court on virtually a daily basis, and prides himself with providing clients with representation that is thorough, honest and uncompromising. Mr. Marshall has consulted in both newspaper and television, most recently consulting on Law and Order and House, appearing on CNBC, and in the Starledger. Mr. Marshall always welcomes the opportunity to speak to prospective clients.

Areas of Practice

  • Broker Fraud
  • Appeals/Appellate
  • Business Law
  • Criminal Law
  • DUI / DWI
  • Domestic Violence
  • Intellectual Property
  • Juvenile Law
  • Municipal Law
  • Traffic Violations
  • White Collar Crimes

Certified Legal Specialties

  • Alcotest Breathalyzer, Draeger Safety
  • Standardized Field Sobriety Testing, NTSA

Bar Admissions

  • New Jersey, 1993
  • U.S. District Court District of New Jersey
  • U.S. District Court Eastern District of Pennsylvania
  • U.S. District Court Middle District of Pennsylvania
  • U.S. District Court Western District of Pennsylvania


  • Seton Hall University School of Law, Newark, New Jersey – 1992
  • Honors: Top 20% of Class
  • Rider University
  • B.S.
  • Honors: With High Honors
  • Honors: 4.0 Award (2 Semesters)
  • Honors: Top Scholar – All College Fraternities
  • Major: Accounting & Finance

Professional Associations and Memberships

  • Association of Criminal Defense Lawyers of New Jersey, Member, 2008 – Present
  • National College of DUI Attorneys
  • Top 100 Trial Lawyers

Past Employment Positions

  • Borough of Matawan, Prosecutor, 1997 – 2000
  • Township of Hazlet, Prosecutor, 1995 – 1998

Previous Names

  • John F. Marshall
Contact Information