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About me

David Marquis has devoted over 20 years to representing injured victims against insurance companies. He has represented over 5,000 injured Ohioans. He has also handled cases from across the United States and internationally. David has resolved  cases resulting in verdicts or settlements of multiple millions of dollars. Recently, he concluded a motorcycle accident case for well over three million dollars.
He is a graduate of The College of New Jersey. He attended the University of Dayton School of Law, graduating in 1990. David completed a 2 year judicial clerkship for The Honorable Judge Thomas Grady (retired) of the Ohio Second District Court of Appeals, drafting opinions for the Court. David then spent two years working for Lexis Nexis as Staff Attorney before joining Dyer, Garofalo, Mann & Schultz as an associate attorney in 1995. Since that time, David has represented thousands of injured plaintiffs in an aggressive and highly successful manner. He was named Partner in 2004.
David is actively involved in the community with the Greater Dayton Volunteer Lawyers Project where he provides pro bono services. He is an adjunct professor at Edison State College.
He is admitted to practice law in Ohio and Pennsylvania.


Languages spoken: English, Spanish

Photos and videos

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Practice areas


  1. Car Accidents: 65%
  2. Litigation: 15%
    24 years, 250 cases
  3. Insurance: 10%
  4. Nursing Home Abuse and Neglect: 5%
  5. Medical Malpractice: 5%



Contingent (33%)

Attorney endorsements

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  • Samuel Jason Warden

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    Samuel Warden Personal Injury Attorney
    Relationship: Fellow lawyer in community

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    Ronald Maurer Personal Injury Attorney
    Relationship: Fellow lawyer in community

Contact info

Dyer Garofalo Mann & Schultz

131 North Ludlow St
Suite 1400
Dayton, OH, 45402-1110


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
SuperLawyer 2015SuperLawyers2015
Million Dollar AdvocateMillion Dollar Advocates Forum2015
Multi-Million Dollar AdvocateMulti-Million Dollar Advocates Forum2015
SuperLawyer 2014SuperLawyers2014
Work experience
TitleCompany nameDuration
PartnerDyer, Garofalo, Mann & Schultz2004 - Present
Adjunct ProfessorEdison State Community College2003 - 2004
AssociateDyer, Garofalo, Mann & Schultz1995 - 2003
Research AttorneyLexis/Nexis1993 - 1995
Staff AttorneySecond District Court Of Appeal1990 - 1993
Association namePosition nameDuration
American Bar AssociationN/AN/A
Ohio State Bar AssociationN/AN/A
Pennsylvania Bar AssociationN/AN/A
American Association for JusticeN/AN/A
Ohio Association for JusticeN/AN/A
Dayton Bar AssociationN/AN/A
Volunteer Lawyers Project, DaytonN/AN/A
School nameMajorDegreeGraduated
University of Dayton School of LawLawJD - Juris Doctor1990
College of New JerseyN/ABA - Bachelor of Arts1985