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Jon Welner

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Direct: 415.984.9656
Main: 415.398.8080
Fax: 800.538.2541
Main: 310.203.8080

2 Embarcadero Center
5th Floor
San Francisco, California 94111

1900 Avenue of the Stars
7th Floor
Los Angeles, California 90067

Joan Ellis
415.398.8080 Ext: 9624

Jon Welner is a leading practitioner of environmental and natural resource law in California. Jon represents clients in all areas of environmental, natural resource, and land use law. His practice includes the regulation of air, water, hazardous substances, hazardous waste, radiological materials, development of contaminated properties (“Brownfields”), energy and water companies, coastal development, endangered species and other natural resources, as well as matters involving CEQA and NEPA (environmental impact reports/studies), the Williamson Act (farmland preservation), OSHA/Cal-OSHA, and Prop 65. He has special expertise in conducting legal audits and developing compliance systems, and in the early transfer and redevelopment of former military bases. Jon is frequently called upon by the media to comment on environmental and natural resource topics.

Jon is also the Chair of JMBM’s Prevailing Wage Practice Group.  He is recognized as one of the foremost practitioners in the State, and is frequently involved in complex and groundbreaking cases on behalf of developers, contractors, and manufacturers.  Jon has been featured in the California Lawyer as one of top prevailing wage lawyers in the State.

Legal Update: See JMBM’s checklist for CalCIMA, preparing ready-mix concrete suppliers to comply with California’s new prevailing wage requirements on July 1 (AB219).

Jon represents clients in both administrative and judicial proceedings, including proceedings before California Air Districts, the State and Regional Water Boards, the California Department of Toxic Substances Control, the California Department of Public Health, the California Department of Conservation,the California Public Utilities Commission, the California Energy Commission, the Coastal Commission, the San Francisco Bay Area Conservation and Development Commission (BCDC), the State Lands Commission, the California Department of Industrial Relations, U.S. EPA, the U.S. Army Corps of Engineers, the U.S. Nuclear Regulatory Commission, the U.S. Department of Labor, local governments, and other agencies. He has previously served as a senior official at the California Natural Resources Agency.

Jon's clients include project developers, land owners, solar companies, mining companies, concrete suppliers, oil and gas companies, hospitality companies, water utilities, automobile manufacturers, chemical manufacturers, biotechnology companies, modular building manufacturers, scrap metal recyclers, hazardous waste and solid waste landfills, local governments, and nonprofit organizations.

Jon Welner is a Member and former Chair of the Planning Commission of the Town of Tiburon, California.


J.D., Stanford Law School, 1995

  • Class Marshal, 1995.
  • President, Environmental Law Society, 1994-5.
  • Associate Editor, Stanford Law Review, 1993-95.

A.B., with Distinction, Political Science, Stanford University, 1989

  • Phi Beta Kappa, 1989.
  • John Gardner Fellow, 1989
  • Chair, Stanford-in-Government, 1988-89
  • Harry S. Truman Scholar, 1987

Bar Admissions

State Bar of California


Immediate Past Chair, Environmental Law Section, Bar Association of San Francisco

Executive Committee, Environmental Law Section, California State Bar

Board of Directors, Osher Marin Jewish Community Center

Board of Directors, John Gardner Fellowship Association

Advisory Board, Stanford-in-Government

Formerly served on the Boards of the following institutions:

Congregation Rodef Sholom (San Rafael).

Cystic Fibrosis Foundation, Northern California Chapter.

San Francisco Museum of Craft and Folk Art.

Awards & Recognition

  • Martindale-Hubbell Peer Review, AV Preeminent Rating
  • Avvo, Superb Rating
  • Recognized as one of The Best Lawyers in America® for 2016 & 2017