About William A.
William A. Proetta earned his J.D. from Seton Hall University School of Law. He completed the legal training that set the stage for a career centered in New Jersey courts. Law school remains a touchstone for his approach to practice: methodical, detail-oriented and practical.
He began professional life in private practice. In 2017 he served as a partner at the Law Offices of Jonathan F. Marshall. That role put him into courtroom work and client counseling on a steady basis. The experience led him to take on larger management and case responsibilities.
Proetta later co-founded Proetta & Oliver, LLC. As a founding partner he handled both casework and the business side of running a small firm. He then established The Law Offices of William A. Proetta, LLC, where he continues his practice. Those moves reflect a steady progression from associate to partner to principal attorney.
His training includes specialized credentials tied to impaired-driving matters. He is a trained Alcotest operator for Draeger equipment and a certified instructor in Standard Field Sobriety Testing under NHTSA protocols. Those certifications signal technical competence in evidence and testing procedures that often arise in traffic and DUI-related prosecutions.
Proetta maintains active memberships in several professional organizations. He belongs to the American Bar Association and the New Jersey Bar Association. He is also a member of the New Jersey Association for Justice. Participation in these groups keeps him connected to developments in criminal and civil practice, and to peers across the state and the country.
Courtroom work and client representation have been steady features of his legal life. He has handled the administrative demands of running a practice while continuing to represent clients in contested matters. His background combines hands-on courtroom experience with roles in firm leadership and administration.
He now practices under The Law Offices of William A. Proetta, LLC. He concentrates his practice on criminal defense, including impaired-driving cases and related proceedings.
