Don Willenburg

Mary Powell is a top attorney recognized by Best Lawyers in the practice area(s) of Employee Benefits (ERISA) Law. Mary, 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 Mary is held by other top lawyers in the same geographic and legal practice area.

Fortune 100 companies rely on Valarie Williams to resolve critical multinational antitrust issues in the boardroom and the courtroom. She has innovative ideas for deciding where and when to bring lawsuits to recover compensation for past wrongs, defending against serious allegations brought by the government or civil claimants, and getting a deal through antitrust regulators in multiple jurisdictions. Valarie concentrates her practice in antitrust litigation, with extensive experience in both...

Joy C. Chang is a top attorney recognized by Best Lawyers in the practice area(s) of Trusts and Estates. Joy C., who practices law in San Francisco, California, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Joy C. is held by other top lawyers in the same geographic and legal practice area.

Ron Holland represents employers in state and federal court litigation, including wage and hour class actions, whistleblowing, wrongful termination, harassment, discrimination, breach of contract, and other complex labor and employment matters. He has experience defending employers in proceedings before governmental agencies, such as the Department of Fair Employment and Housing, the Equal Opportunity Employment Commission, the National Labor Relations Board (NLRB), the California Labor Commi...

Kirsten Wolff is a top attorney recognized by Best Lawyers in the practice area(s) of Trusts and Estates. Kirsten, 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 Kirsten is held by other top lawyers in the same geographic and legal practice area.

Ronald E. Van Buskirk is a top attorney recognized by Best Lawyers in the practice area(s) of Environmental Law and Litigation - Environmental. Ronald 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 Ronald E. is held by other top lawyers in the same geographic and legal practice area.

William F. Tarantino is a top attorney recognized by Best Lawyers in the practice area(s) of Natural Resources Law. William F., 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 William F. is held by other top lawyers in the same geographic and legal practice area.

Alicia Guerra has developed a multi-disciplinary practice focused on local, state, and federal land use entitlement and permitting and environmental review for a broad sector of private industry, developers, and public agencies. Ms. Guerra’s practice often involves complex and controversial projects at all levels of the administrative process including due diligence, land use entitlements, development agreements, disposition and development agreements, permitting advice, and counsel for...

Joshua Zachariah is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law. Joshua, who practices law in San Francisco, California, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Joshua is held by other top lawyers in the same geographic and legal practice area.

Jon has handled bankruptcy and commercial law matters, both simple and complex, since 1993. He maintains a practice primarily representing debtors and creditors in business bankruptcies, commercial restructurings, commercial litigation, and other matters relating to insolvency issues. He has represented chapter 7 trustees, creditors’ committees, secured creditors, and debtors-in-possession in numerous proceedings in a number of different jurisdictions. In addition to appearing often in ...