Our Firm

Our History

Koss Firm APC has more than 30 years of collective experience in civil litigation and related client representation. We offer representation for consultations, pre-litigation claims, and all aspects of litigation including arbitration, trial, and appeals.

Adam is certified by the California State Bar Board of Legal Specialization in Legal Malpractice Law, and focuses on all areas of ethics and professional liability.

Catherine has a dedicated Trusts and Estates Law practice, in which she represents trustees, personal representatives, creditors, beneficiaries, and heirs in contested and uncontested matters related to trusts and decedent’s estates.

Our Vision

We strive to provide individualized, results-oriented legal services to our clients. This client-forward approach means that we actively communicate with our clients to build strategies for best outcomes. We enjoy advocating for our clients in a practice that balances practicality with creative and proactive solutions.

Firm News

Pebley v. Santa Clara Organics

On July 9, 2018, Adam filed an amicus letter brief on behalf of DRI urging the California Supreme Court to grant review of Pebley v. Santa Clara Organics (2018) 22 Cal.App.5th …

Super Lawyers

Adam Koss, partner at the Koss Firm, has been selected to the 2018 Northern California Super Lawyers Rising Stars list for Professional Liability: Plaintiff. Each year, no more than 2.5 …