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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 30 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, Owens Corning, and Wells Fargo in environmental litigation matters (including citizen lawsuits); Lennar, Gruma (food company), and dozens of 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 and Leprino Foods in securing environmental permits for new or expanded operations; oil and gas companies in climate change matters; and banks and private equity firms in environmental due diligence related to real property and other 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 (since 2008)

    Legal 500 US, recommended in environmental litigation (since 2013)

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