Arianna Beltrez is an Attorney at Keller Postman. Arianna is committed to pursuing justice on behalf of families in state courts across the country against Abbott and Mead, the makers of Enfamil and Similac infant formula fortifiers, for their role in causing preterm infants to develop necrotizing enterocolitis (NEC).

She works collaboratively with a team to build and advance case initiatives in seeking to hold formula manufacturers responsible for falsely marketing their infant formulas as “medically endorsed” and “nutritionally equivalent” to mother’s breast milk, despite these formulas being linked to the development of NEC.

Prior to joining Keller Postman, Arianna was a Senior Assistant District Attorney with the Kings County District Attorney’s Office, where she prosecuted a wide variety of felony cases and was directly responsible for investigations and case enhancement from inception to trial. Her time with the District Attorney’s Office afforded her extensive investigative and courtroom experience, as well as the opportunity to engage in drafting indictments, search warrants, accusatory instruments, and substantial motion practice.

Arianna also spent time as a Senior Associate with Wilson Elser, where she represented established businesses, municipalities, construction managers, and owners in all aspects of civil litigation. Her practice focused on the defense of claims related to general liability, labor law, and construction litigation.


  • J.D., Albany Law School
  • B.S., Brooklyn College

Previous Affiliations

  • Wilson Elser Moskowitz Edelman and Dicker
  • Kings County District Attorneys Office