Jeffery E. "Jeff" Tsai

Marne S. Sussman is a top attorney recognized by Best Lawyers in the practice area(s) of Energy Law, Environmental Law, Land Use and Zoning Law and Litigation - Environmental. Marne S., who practices law in San Francisco, California, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Marne S. is held by other top lawyers in the same geographic and legal practice area.

Bradley B. Brownlow is a top attorney recognized by Best Lawyers in the practice area(s) of Land Use and Zoning Law. Bradley B., who practices law in San Francisco, California, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Bradley B. is held by other top lawyers in the same geographic and legal practice area.

Jon M. Novotny is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law. Jon M., who practices law in San Francisco, California, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jon M. is held by other top lawyers in the same geographic and legal practice area.

Jason Geller is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management. Jason, who practices law in San Francisco, California, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jason is held by other top lawyers in the same geographic and legal practice area.

Shawn M. Christianson focuses her practice on insolvency, receiverships, and complex litigation with an emphasis on technology related issues. She represents financial institutions, secured and unsecured creditors, technology companies, receivers, and bankruptcy trustees. Her practice spans the state, federal and bankruptcy courts, as well as out of court proceedings and mediation. She argued, and prevailed at every level from the trial court through the Ninth Circuit, a seminal case on the t...

Kenneth E. Keller is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Intellectual Property and Litigation - Patent. Kenneth E., who practices law in San Francisco, California, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Kenneth E. is held by other top lawyers in the same geographic and legal practice area.

Sophia (Sophie) Castillo counsels domestic and international importers, distributors, national brands, private labels, institutional suppliers, family-owned food processing businesses, and retail grocers on compliance, litigation, and risk avoidance surrounding California’s Proposition 65, as well as other state and national laws related to chemicals and toxics. She advises clients involved in numerous industries across the entire supply chain, including food and beverage, apparel, cook...

Gretchen M. Wallacker is a Certified Family Law Specialist and has practiced family law exclusively for three decades. In that time, she has helped countless families transition out of their marriages, settling a full spectrum of complex family law matters that involve child custody, visitation, child support, spousal support, and property division, including division of high net worth estates. Drawing on her geographical focus in San Francisco, the Peninsula, and Silicon Valley, Gretchen und...

William I. Schwartz is a top attorney recognized by Best Lawyers in the practice area(s) of Information Technology Law. William I., who practices law in San Francisco, California, has been recognized since 2003. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which William I. is held by other top lawyers in the same geographic and legal practice area.

Monica Mazzei is a Shareholder in Buchalter’s San Francisco office and the chair of the Firm’s Family Law group. Monica is a Certified Family Law Specialist representing high net worth clients. She represents clients throughout California, with a concentration in San Francisco and Silicon Valley, as well as Los Angeles.