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About me


John Mattiacci is an experienced litigator who believes that each client should be treated with the utmost respect and attention.  He is a graduate of the Beasley School of Law at Temple University where he received several awards for trial advocacy. He is admitted to practice in Pennsylvania and in New Jersey.

John has exclusively represented injured clients in personal injury matters for nearly nine years.  He has obtained settlements and verdicts totaling millions of dollars over the course of his career in all types of personal injury matters, including auto accidents, construction accidents, defective product cases, civil rights violations, and slip and fall cases.

John lives in Moorestown, NJ with his wife Laura, also an attorney, and their two children.


Memberships and Honors 

Selected as a “Pennsylvania Rising Star” by Philadelphia Magazine and Philadelphia Super Lawyers Magazine in 2008

Philadelphia Trial Lawyers Association

American Association for Justice

National Champion of the American Association for Justice’s (AAJ) Trial Advocacy Competition 

Two-time Regional Champion of AAJ’s Trial Advocacy Competition

Champion of Quinnipiac University School of Law’s Northeast Regional Criminal Justice Advocacy Competition 

Recipient of Victor S. Jaczun Award for Outstanding Trial Advocacy




Languages spoken: American Sign Language, Spanish

Photos and videos

596705 1318431649

Practice areas


  1. Personal Injury: 100%
    14 years



Contingent (33-40%)

Attorney endorsements

4 total 

Are you an attorney? Endorse this lawyer

  • Christian K. Lassen II

    Top-notch attorney. Highly respected in the legal community.


    Christian Lassen Personal injury Attorney
    Relationship: Fellow lawyer in community

  • Sean E. Quinn

    John is one of the best young trial lawyers in the Philadelphia region. I have had the distinct privilege of working together with him on several cases, and always found him to be hard-working, prepared, and creative. He truly cares about his clients and works tirelessly to ensure that they get the justice that they deserve. His clients are lucky to have him on their side. John is an asset to the legal community and exemplifies what it means to be a trial lawyer.


    Sean Quinn Personal injury Attorney
    Relationship: Worked together on matter

Contact info

Mattiacci Law, LLC

110 Marter Avenue
Suite 105
Moorestown, NJ, 08057


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Top 40 Lawyers Under 40American Society of Legal Advocates2014
Million Dollar AdvocateMillion Dollar Advocates Forum2014
Multi-Million Dollar AdvocateMulti-Million Dollar Advocates Forum2014
AV Peer Review RatingMartindale-Hubbell2014
Top 100 Trial LawyersNational Trial Lawyers2013
Rising Stars 2008SuperLawyers2008
Victor S. Jaczun Award for Outstanding Oral AdvocacyTemple University - James E. Beasley School of Law2002
Regional ChampionAmerican Association for Justice2002
National ChampionAmerican Association for Justice2001
Work experience
TitleCompany nameDuration
AttorneyLaw Offices of John T. Dooley, LLC2009 - Present
AttorneyLaw Offices of Henry Lewandowski, III, P.C.2006 - 2009
AttorneyR.K. Washington, Jr. & Associates, P.C.2004 - 2006
AssociateDugan Brinkmann Maginnis & Pace2002 - 2004
Association namePosition nameDuration
Philadelphia Trial Lawyers AssociationMemberN/A
American Association for JusticeMemberN/A
Legal cases
Case nameOutcome
$900,000 for union teamster$900,000 settlement
$500,000 for injured ironworker$500,000
$511,500 verdict for a trip and fall on a city sidewalk$511,500.00 - Verdict for Plaintiff
See all legal cases 
School nameMajorDegreeGraduated
Temple University - James E. Beasley School of LawLawJD - Juris Doctor2002
Dickinson CollegeBiologyBS - Bachelor of Science1998