David Tronjanowski is an Associate with Marks, O’Neill, O’Brien, Doherty & Kelly’s Maryland office.  He is admitted to practice in Maryland and U.S. District Court for the District of Maryland.  He is also a member of the Maryland and Baltimore County Bar Associations.

David graduated from Towson University in 2009, with a Bachelor of Science in Business Administration. He then attended University of Baltimore School of Law, graduating in 2014. During law school, he was a member of the Intellectual Property Law Society and clerked for law firms in Baltimore and Silver Spring, Maryland where he gained experience in civil litigation.  Following law school, Dave served as a Judicial Law Clerks to Honorable H. Patrick Stringer in the Circuit Court for Baltimore County.

Since joining Marks O’Neill in 2016, David has represented insurance companies in general litigation matters.  He focuses his practice on premises liability litigation involving personal injury claims, defending healthcare providers and medical professionals in medical malpractice claims.

David enjoys playing basketball and is an avid Baltimore Ravens/Orioles fan.  

David M. Trojanowski
Associate / Maryland

Phone 410-339-6880 ext. 3529
Email DTrojanowski@moodklaw.com

David M. Trojanowski PDF


  • J.D., University of Baltimore School of Law, 2014
  • B.S., Towson University, 2009

Bar Admissions

  • Maryland, 2014
  • U.S. District Court for the District of Maryland, 2016

Bar Associations

  • Maryland State Bar Association
  • Baltimore County Bar Association

Practice Areas

  • Casualty Group
  • Professional Liability
  • Transportation/Trucking


600 Baltimore Avenue, Suite 305, Towson, MD 21204