Biography
A steadfast advocate for New Mexico clients.
Arthur Kostanian is a New Mexico attorney with experience in criminal defense, municipal prosecution, and family law. Born in Armenia and raised in Albuquerque, he has strong ties to the community he serves.
Arthur earned his undergraduate degree from the University of New Mexico and attended Thomas Jefferson School of Law in San Diego before being admitted to the State Bar of New Mexico. He began his career defending clients facing serious criminal charges with the Public Defender’s Office, then served as an Assistant City Attorney in Rio Rancho. Working in both defense and prosecution gave him a broad understanding of how cases are built and challenged.
He brings that courtroom experience to family law, particularly divorce and child custody matters, where the decisions at stake are often deeply personal. With careful preparation and straightforward advice, Arthur helps clients understand their options while protecting their rights. His approach is practical and measured, giving clients clear guidance through difficult decisions.

