About Stephen Isaac
Stephen Isaac Gassner is a seasoned family law attorney based in Upland, California, with over 30 years of experience in the legal field. He has been a member of the State Bar of California since 1995, demonstrating a long-standing commitment to serving clients in family law matters. His practice primarily focuses on divorce, domestic violence, and a variety of other family law issues that affect individuals and families. Mr. Gassner earned his Juris Doctor from the University of La Verne College of Law in 1994, equipping him with the legal knowledge necessary to navigate complex family law cases. Prior to that, he obtained an MBA from National University in 1989, which provided him with a strong foundation in business principles that often intersect with family law matters.
His undergraduate studies were completed at Pitzer College, further enriching his educational background. In 2019, Mr. Gassner achieved certification as a Family Law Specialist by the State Bar of California, a designation that shows his expertise and dedication to this area of law. He is an active member of the California Lawyers Association, including its Family Law Section, which allows him to stay current on legal developments and best practices in family law. His firm, the Law Office of Stephen Gassner, is located at 324 N. Mountain Ave, Upland, CA 91786, where he provides a range of services tailored to meet the needs of his clients.
The firm handles both collaborative and contested divorces, military divorces, property division, spousal support, and same-sex divorces. Additionally, Mr. Gassner addresses domestic violence issues, offering vital services such as restraining orders and victim rights advocacy. His practice also covers adoption, child custody, child support, paternity, and prenuptial agreements, making him a comprehensive resource for individuals navigating family law challenges. Before establishing his own practice, Mr. Gassner worked working at various law firms, where he developed his skills in family law litigation.
This extensive background enables him to provide thorough legal services to clients facing complex family law issues. His commitment to excellence in the legal profession is recognized; he has been recognized by Super Lawyers, an exclusive list of top-rated attorneys, with selection for inclusion in 2026. Mr. Gassner is admitted to practice before all California state courts and the U.S. District Court for the Central District of California, further solidifying his standing as a trusted legal resource in family law.
