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Welcome to Stowell, Zeilenga, Ruth, Vaughn & Treiger LLP

Our firm offers its clients a unique combination of large firm capabilities with the heightened personal service and attention typical of a small firm. The Firm’s attorneys are graduates of some of the most prestigious law schools in the country and bring with them traditions of excellence, and remarkable success, in a diverse range of highly specialized practice areas.

Our attorneys


David Stowell offers a unique combination of business expertise and trial experience to advise clients on all aspects of their business operations and to defend their rights in litigation.


Richard Zeilenga specializes in business and real estate litigation, and real estate development-related counseling and litigation, with a substantial practice in land use/environmental (CEQA) litigation throughout California.


James Vaughn specializes in business litigation and real estate, including a substantial practice in land use entitlement and litigation, assisting developers, commercial property owners and public agencies in complex real estate development projects.


Adam K. Treiger concentrates his practice on complex employment and business law counseling and litigation, focusing on litigation prevention and day-to-day employment and business law counseling, as well as on representing employer clients in litigation.


Eric H. Halvorson concentrates his practice in business planning, business transactions and estate planning. He brings a wide diversity of experience to the practice of law.


Shane Maguire concentrates his practice on labor and employment litigation and counseling, as well as commercial litigation matters.

Shane Maguire



  • June 2018 – We are all greatly saddened by the news of our partner, David Ruth’s, death, on June 11, 2018.  David was a wise and skilled attorney, and a dear friend.  We will miss him terribly.
    • August 2015 – Adam K. Treiger awarded San Fernando Valley Business Journal’s 2015 Client Services Award and a 2015 Trusted Advisors Award.

    • October 2014 – Richard Zeilenga files CEQA lawsuit against the City of Los Angeles, to stop Bel Air hillside development. (Beverly Hills Courier): Bel-Air Homeowners Alliance Sues City of Los Angeles.

    • August 2014 – Richard Zeilenga challenges Bel Air hillside project before the Los Angeles Board of Building and Safety Commissioners. (Beverly Hills Courier): Massive Somma Way Haul Route Approved by LADBS

    Recent Posts

    New Employment Laws Sept. 2018

    The following are summaries of new employment laws passed by the California legislature, and signed by the Governor, at the end of September, 2018. SB 1343 — Employers with 5 or more employees, including part time, temporary and seasonal employees, must give anti-harassment and...

    The Firm’s attorneys are licensed to practice law in California and practice law in no other state or jurisdiction. This communication is an advertisement as defined by the California Rules of Professional Conduct and California Business and Professions Code. The information in this website is for general information purposes only. The information presented in this website should be viewed only as a summary of each topic, and nothing on this or associated pages, documents, comments, answers, emails, or other communications should be taken as legal advice for any individual case or situation. Neither the information on this website, nor any communication resulting from such information or from this website, is intended to create, and receipt or viewing of this information does not constitute, an attorney-client relationship unless a separate retainer agreement is signed by the attorney and the client.