Marc Rosenberg is the Managing and founding Partner at the law 

firm of Mammuth & Rosenberg and is licensed and practices law in the State and

Federal Courts of both Pennsylvania and New Jersey .


Mr. Rosenberg  received his B.A. in 1982 from Rutgers College and his Juris Doctorate 

in 1985 from The Delaware Law School, where he was a Law Review Editor.


Mr. Rosenberg has dedicated himself to the representation of profoundly injured victims. 

His practice involves complex cases arising out of motor vehicle accidents, premises

and products liability, medical malpractice, and construction site negligence. He is an

active litigator and has gained substantial compensation for his clients including many

awards in excess of a Million Dollars.


He is a lifetime member of the Million Dollar Advocates Forum and has served as a Judge Pro Tem and as an Arbitrator in several jurisdictions.  Licensed in Pennsylvania and New Jersey Mr. Rosenberg has offices in Bala Cynwyd, Pennsylvania and Marlton, New Jersey and has litigated cases successfully in other jurisdictions including Florida, Virginia, Maryland, where the courts have allowed his admission for those particular cases. 


Mr. Rosenberg has been awarded various legal  distinctions including being selected consistently as a “Super Lawyer” from 2012 – the present. This honor is awarded to only the top five percent of Attorneys. He has achieved the “highest Peer Review Rating” available as determined by the confidential opinions of lawyers and members of the judiciary.


Mr. Rosenberg is a trial lawyer and has spoken frequently as a guest lecturer at neighboring Universities and on behalf of the Pennsylvania Bar Institute, Philadelphia Trial Lawyers Association, The Pennsylvania Association of Justice as well as other bar organizations. He is a member in good standing of the Pennsylvania Bar Institute, Philadelphia Trial Lawyers Association, The Pennsylvania and New Jersey Association of Justice, The Camden County Bar Association, and the New Jersey Bar Associations.







  • 100% of Practice Devoted to Litigation



  • Pennsylvania, 1985

  • New Jersey, 1987

  • U.S. Federal Courts, 1985

  • U.S. District Court Eastern District of Pennsylvania, 1985

  • U.S. District Court District of New Jersey, 1987




  • Delaware Law School, Wilmington, Delaware

    • J.D. – 1985

    • Law Review: Law Review, Editor, 1984 – 1985

  • Rutgers College, New Brunswick, New Jersey

    • B.A. – 1982

    • Major: Political Science




  • Guest Lecturer, Pennsylvania Bar Institute

  • Guest Lecturer, Philadelphia’s Pennsylvania Trial Lawyers

  • Guest Lecturer, American Association for Justice

  • Guest Lecturer at local universities





Licensed in Pennsylvania and New Jersey, Mammuth & Rosenberg has offices in Bala Cynwyd, Pennsylvania, and Cherry Hill, New Jersey. Call Mammuth & Rosenberg at #610.667.1500, or contact us online. We handle a vast majority of different types of personal injury cases, so always feel free to give us a call to speak with us further.