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Thomas M. Donnelly (Tom)


(T) +1.415.875.5880
(F) +1.415.875.5700


  • Harvard University (J.D. 1988); Tufts University (B.A. in Political Science and History summa cum laude 1985)

Bar Admissions

  • California, U.S. Courts of Appeals for the Ninth and Eleventh Circuits, and U.S. Supreme Court

Tom Donnelly has practiced environmental and insurance coverage law for more than 28 years. He represents clients in environmental litigation and regulatory enforcement proceedings, provides environmental compliance counseling and due diligence/transactional support, and assists clients in securing coverage from their insurers. Tom's clients have included high-tech, aerospace, energy, oil and gas, and metals and mining companies; auto manufacturers; utilities; equipment and consumer product manufacturers; food companies; retailers; financial institutions; and real property owners and developers. He has appeared in all federal district courts in California, the Ninth and Eleventh Circuit Courts of Appeals, and California trial and appellate courts.

Tom's recent representations include: Chevron, Fluor, and Wells Fargo in environmental litigation matters (including citizen suits); Lennar, Gruma (food company), and equipment and consumer product manufacturers in Proposition 65 lawsuits; Firestone Building Products and Procter & Gamble in regulatory enforcement matters; Aerojet Rocketdyne (aerospace), Kyocera (semiconductor), SanDisk (data storage), Scotts (fertilizers and pesticides), and Toyota in environmental compliance matters; Sutter Home in securing environmental permits for a new winery; oil and gas companies in climate change matters; and banks and private equity firms in environmental due diligence related to real property and business transactions. For PG&E, after a seven-week jury trial, Tom secured a verdict that a policy issued by AIG covered PG&E for property damage claims totaling $24 million.

Tom is listed in Chambers USA as one of the leading environmental attorneys in the state of California, and he has been recognized as a leading environmental attorney by several other trade publications.

Honors & Distinctions

  • Chambers USA, leading environmental lawyer in California (2008 through 2017)

    Legal 500 US, recommended in environmental litigation (2013 through 2017)

    Best Lawyers in America, environmental litigation (2011 through 2017)
Thomas Donnelly Tom