Andrew Vallejo is an Associate with Marks, O’Neill, O’Brien, Doherty & Kelly. He is admitted to practice in New Jersey.

In 2010, Andrew graduated from Valley Forge Military College and earned an Associates of Arts in Business Administration. During his time at Valley Forge Military College, Andrew served as the Class Vice President while simultaneously participating in the Army Reserve Officer Training Corps (ROTC) Early Commissioning Program serving in such roles as Executive Officer and Squad Leader.

After graduating from Valley Forge, Andrew proceeded to Rutgers University where he received a Bachelor of Arts in Communication and Economics and served as the Vice President of the Rutgers University Interfraternity Council. Andrew next earned his juris doctorate from Rutgers Law School and served as the President of the Sports and Entertainment Law Society and as the Business Editor for Rutgers Journal of Law and Religion.

Andrew joined the United States Army in the Fall of 2008 and has served in both the Pennsylvania and New Jersey National Guard. His prior service in the military included his service in units such as the Judge Advocate General (JAG), Cavalry and Finance corps. Before leaving the service, he served as a Detachment Commander in the New Jersey National Guard.

Prior to joining Marks O’Neill, Andrew gained litigation experience at an insurance defense firm handling a wide range of general liability matters, including representation in areas such as personal injuries and underinsured/uninsured motorist claims from automobile accidents, slip and fall/trip and fall premises liability. His experience ranges from representing large public companies and insurance carriers to also representing individuals and small businesses.

At Marks O’Neill, Andrew brings his extensive experience to the Casualty, Construction and Transportation practice groups.

In his free time, Andrew is an avid Philadelphia sports fan and active volleyball player in New Jersey and Philadelphia.

Andrew J. Vallejo

Phone 856-406-1319

Andrew J. Vallejo PDF


  • J.D., Rutgers University School of Law, 2018
  • B.A., Rutgers University, New Brunswick, 2013
  • A.A., Valley Forge Military College, 2010

Bar Admissions

  • New Jersey

Bar Associations

Practice Areas

  • Casualty Group
  • Construction Accident/Construction Defect
  • Transportation/Trucking

Representative Cases