Picture of Jon Welner
Environmental Law, Energy, and Land Use

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, contaminated properties (“Brownfields”), power plants, oil and gas facilities, 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 (workplace safety), and Prop 65 (chemicals in products).

Jon has special expertise on the siting of power plants in California and proceedings before the California Energy Commission.

Jon represents clients in both administrative and judicial proceedings, including matters before the California Air Resources Board (CARB) and 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 California Coastal Commission, the San Francisco Bay Area Conservation and Development Commission (BCDC), the State Lands Commission, U.S. EPA, the U.S. Army Corps of Engineers, the U.S. Nuclear Regulatory Commission, local governments, and other agencies.

Jon's clients include project developers, land owners, solar companies, mining companies, concrete suppliers, oil and gas companies, hotels and 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 is a Councilmember of the Town of Tiburon, California. Prior to becoming a Councilmember, he served for six years on the Town’s Planning Commission. He also previously served as a senior official at the California Natural Resources Agency.

Jon is a Board Member of MCE Clean Energy, a local government agency (Community Choice Aggregator, or CCA) providing renewable electricity to Bay Area communities.

Prevailing Wage

Jon is 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 represents employers in proceedings before the California Department of Industrial Relations and the Labor Commissioner, including public works determinations and appeals of Civil Wage and Penalty Assessments (CWPAs). He defends clients in high-stakes prevailing wage litigation. He also represents clients on matters involving federal prevailing wages (Davis-Bacon), and in the negotiation and operation of Project Labor Agreements (PLAs).

Jon frequently speaks and writes on prevailing wage topics. He is the principal advisor on prevailing wage matters for the California Construction and Industrial Materials Association (CalCIMA), and has prepared a Prevailing Wage Compliance Checklist for California concrete producers.

Jon also publishes WELNER ON WAGES, a series of articles on LinkedIn about current developments in prevailing wage law.

Welner on Wages
Bar Admissions State Bar of California

J.D., Stanford Law School, 1995
Class Marshal, 1995
President, Environmental Law Society, 1994-95
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


Executive Committee Member and former Chair, Environmental Law Section, Bar Association of San Francisco

Advisory Board, Environmental Law Section, California Lawyers Association (formerly the California State Bar)

Board of Directors, Osher Marin Jewish Community Center

Board of Directors, John Gardner Fellowship Association

Advisory Board, Stanford-in-Government

Awards & Recognition
  • Martindale-Hubbell Peer Review, AV Preeminent Rating
  • Avvo, Superb Rating
  • Recognized as a Northern California Super Lawyer for 2017
  • Recognized as one of The Best Lawyers in America® for 2016-2018
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.
Publications & Events