John Kortum


San Francisco – Walnut Creek, CA
D 925.466.5915


John Kortum is a Partner in Freeman Mathis & Gary, LLP’s Walnut Creek office. His areas of the law include environmental litigation under CERCLA, RCRA, the Clean Water Act and Proposition 65, personal injury litigation involving construction site accidents, arising from a viral epidemic, automobile accidents related to construction projects, and asbestos exposure. He also focuses on property damage claims arising from construction projects, contract disputes often involving complex indemnity agreements, inverse condemnation suits arising from flooding, and administrative law including review of administrative decisions under California Code of Civil Procedure 1094.5.  At least two of these cases have involved cutting edge legal issues that have gone to the United States Supreme Court. 

John Kortum has litigated complex cases in state and federal courts since 1990. His clients have included state and federal public entities, a builder of freeways, skyscrapers, stadiums and residential structures, other contractors, a steel manufacturer, real estate developers, a national retail chain, insurance companies, numerous small businesses, an airline and a manufacturer of espresso machines. 

Bar Admissions


California, Northern District

Central District of California

Eastern District of California

Ninth Circuit Court of Appeal

U.S. Court of Federal Claims

U.S. Supreme Court