About Marc J
Marc J Mastriano built a career from classroom study to a solo practice in California. He studied Criminology, Law and Society at the University of California, Irvine, completing his bachelor’s degree in 2005. He then went on to earn a J.D. from the University of San Diego School of Law in 2008.
After law school he moved into private practice. In 2010 he established his own firm, The Law Office of Marc J. Mastriano, and has practiced there since. The move to a solo practice put him in direct contact with clients and cases from the start. He handles matters in California, where he is admitted to practice.
Mastriano’s early academic path emphasized the intersections of criminal justice and law. That background informs how he approaches factual investigations, client interviews and courtroom strategy. He has applied those analytical tools to the civil matters he handles. His work reflects a steady, case-by-case development rather than a reliance on broad rhetoric.
Colleagues describe him as methodical in the way he prepares files and straightforward in his communication with clients. He has served in private practice for the better part of two decades, managing intake, litigation and negotiation on behalf of individuals. Running a small office means he handles many roles: counselor, researcher, negotiator and litigator.
Clients who work with a small firm often cite the accessibility and continuity of representation. Mastriano’s practice offers that continuity. He remains personally involved in case preparation and in court appearances. That hands-on approach shapes the firm’s daily rhythm and how cases are handled from first contact to resolution.
Outside the office his professional memberships date back to the start of his practice in 2010. He has participated in local bar activities and continued legal education over the years. Those activities keep him engaged with evolving law and procedure in California courts.
Today his office, The Law Offices of Marc Mastriano, handles matters for clients across the state. He focuses his practice on family law and divorce matters, representing clients through negotiation and litigation and managing cases from initial filing to final resolution.
