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About me

          I prepare each case as if it will go to trial.  This aggressive approach keeps me ready at all times to prosecute your case to its fullest. 


          I am admitted to practice before the United States Supreme Court; United States Court of Appeals, Second Circuit; United States District Court, Western District of New York; United States Bankruptcy Court, Western District of New York; United States Bankruptcy Court, District of Arizona; United States District Court, Northern District of New York; United States District Court, Western District of Kentucky; and all courts in the State of New York.  


        

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Practice areas

Licensed

  1. Personal Injury: 50%
    3 years
  2. Car Accident: 40%
  3. Trucking Accident: 5%
  4. Motorcycle Accident: 5%

Payment

Fees:

Free consultation (120 minutes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

4 total 

Are you an attorney? Endorse this lawyer

  • Vincent LoTempio

    I endorse David. He is easily approachable and does an excellent job for his clients. He is well regarded by both his peers and the legal community.

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    Vincent LoTempio Intellectual property Attorney
    Relationship: Fellow lawyer in community

  • Michael S. Waddington

    I endorse David. He is a highly skilled attorney that is well respected in the legal community.

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    Michael Waddington Military law Attorney
    Relationship: Fellow lawyer in community

Contact info

William K. Mattar, PC

6720 Main St.
Ste 100
Buffalo, NY, 14221

Resume

License
StateStatusAcquiredUpdated
NYCurrently registered 198407/10/2016
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Awards
Award nameGrantorDate granted
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale-Hubbell2014
Top 100 Trial LawyersThe National Trial Lawyers2014
Super LawyerSuperLawyers2012
Million Dollar AdvocateMillion Dollar Advocates Forum1996
Work experience
TitleCompany nameDuration
Trial Attorney/ Attorney ManagerWilliam K. Mattar, PC2008 - Present
Trial AttorneyLaw Office of J. Michael Hayes2001 - 2008
Trial AttorneyBallow, Braisted, O'Brien & Rusin, PC1995 - 2000
Trial AttorneyLaw Office of James J. Moran1994 - 1995
Assistant Erie County AttorneyErie County Attorney's Office1990 - 1994
Associations
Association namePosition nameDuration
American Bar AssociationMember2016 - Present
Western New York Trial Lawyers AssociationMember2011 - Present
United States Bankruptcy Court, Western District of New YorkAdmitted2010 - Present
United States Court of AppealsAdmitted1999 - Present
United States District Court, Northern District of New YorkAdmitted1998 - Present
United States Supreme CourtAdmitted1994 - Present
United States District Court, Western District of New YorkAdmitted1987 - Present
United States Bankruptcy Court, District of ArizonaAdmittedN/A
Bar Association of Erie CountyMemberN/A
United States District Court, Western District of KentuckyAdmittedN/A
Association of Trial Lawyers of AmericaMemberN/A
Legal cases
Case nameOutcome
Thomas-Vasciannie v. State of New YorkSubstantial damages awarded to Claimant
See all legal cases 
Publications
Publication nameTitleDate
Handling E-Mail, Social Media and other ESIThe Rules of Evidence; A Practical Toolkit2013
Education
School nameMajorDegreeGraduated
University of Dayton School of LawLawJD - Juris Doctor1983
State University of New YorkN/ABS - Bachelor of Science1980
Speaking engagements
Conference nameTitleDate
NBI TeleconferenceAuthenticating Social Media & Email Evidence2016
Audio WebinarAdmissibility of Evidence2016
NBI Teleconference/WebinarAuthenticating Social Media2015
NBI TeleconferenceApplying the Rules of Evidence2015
NBI CLEFind it Fast & Free on the Internet2015
National TeleconferenceAuthenticating Social Media and E-Mail Evidence2014
Insurance, Liens & SubrogationInsurance, Liens & Subrogation2014
Damages in Personal InjurySources of Recovery & Liens2014
Teleconference - Social Media and Email in Civil LitigationSocial Media and Email in Civil Litigation2013
Teleconference - Authenticating Social Media and Email EvidenceAuthenticating Social Media and Email Evidence2013
NBI Continuing Legal Education SeminarCivil Litigation Today: A Practical Workshop2013
NBI Continuing Legal Education SeminarThe Rules of Evidence: A Practical Toolkit2013
NBI Continuing Legal Education SeminarApplying the Rules of Evidence – What Every Attorney Needs to Know2012
NBI Continuing Legal Education SeminarAdvanced Trial Tactics2012
NBI Continuing Legal Education SeminarThe Mechanics of New York Civil Procedure2012
NBI Continuing Legal Education SeminarThe Mechanics of New York Civil Practice2011
NBI Continuing Legal Education SeminarInsurance Fundamentals for the Personal Injury Practice2011
NBI Continuing Legal Education SeminarAdvanced Trial Tactics2011
NBI Continuing Legal Education SeminarNo-Fault Law: Current Issues and Strategies2011
NBI Continuing Legal Education SeminarPractical Discovery From A-Z2010
NBI Continuing Legal Education SeminarLitigating the Uninsured & Underinsured Motorist Claim, Subrogation Issues2010
NBI Continuing Legal Education SeminarKeys to Successful Trial Preparation2009
NBI Continuing Legal Education SeminarHandling Uninsured and Underinsured Motorist Claims2009
NBI Continuing Legal Education SeminarEffective No-Fault Strategies2009
NBI Continuing Legal Education SeminarInitial Considerations in Case Management and Organization2009
NBI Continuing Legal Education SeminarUninsured and Underinsured Motorist Claims2008
Lorman Education Services Continuing Legal EducationLegal Ethics in New York2008
NBI Continuing Legal Education SeminarSettling Uninsured and Underinsured Motorist Claims2007
NBI Continuing Legal Education SeminarYour Guide to Uninsured and Underinsured Motorist Law2007
Lorman Education Services Continuing Legal Education SeminarLegal Ethics in New York2007
NBI Continuing Legal Education SeminarGaining the Best Settlement in Auto Injury Cases2006