Ryan Landis


(949) 467-9513 Email me


Ryan Landis is a Partner in CMBG3’s California-Irvine office. He has over 20 years of legal experience in litigation and compliance matters for a wide range of entities, including government groups, public interest groups, and private corporations of all sizes throughout the world, from Fortune 100 companies to mom-and-pop businesses.

Ryan’s practice focuses on defending corporations in environmental and toxic torts matters, including chemical pollution, products liability, premises liability and asbestos matters. He has served as trial counsel for several clients in litigation matters in California. Ryan is recognized globally as one of the preeminent Proposition 65 attorneys in the country, both for advising on compliance and regulatory changes, and litigation matters. Some of the industries that Ryan has represented clients for Prop 65 matters include:

  • Sports and fitness
  • Food industry
  • Dietary supplements
  • Automotive
  • Cleaning products manufacturers
  • Personal care and cosmetics
  • Transportation
  • Home appliances

Ryan’s extensive environmental law practice began when he worked for the Attorney General’s Office in the state of Alaska, where he litigated statutory enforcement and compliance matters centering on regulations. Some of the issues that he worked on included Mine Closure Remediation, fishery industry compliance matters, wastewater treatment monitoring, and underground storage tank regulations. Ryan later joined the Department of Defense: Office of General Counsel, where he worked on a variety of issues, including cases focusing on Superfund, CEQA, RCRA, CERCLA, Clean Water Act, Marine Mammal Protection Act, National Historic Preservation Act, and the Magnuson-Stevens Act.

Ryan thereafter worked for two of the largest law firms in the world, where his practice continued to focus on Prop 65 and environmental matters. With respect to environmental matters, his practice focused on petrochemical and agricultural product regulations, hazardous waste and groundwater contamination (including alleged hexavalent chromium discharges), environmental auditing, air quality management (including AB 32/greenhouse gas consulting), hazardous waste cleanup, consulting on property Phase I and Phase 2 assessments and any necessary remediation for commercial, industrial or mixed-use properties (including former manufacturing facilities, schools and metal recycling complexes), and compliance with various federal, state, local and international environmental laws and regulations (RCRA, Clean Water Act, CERCLA).


  • University of San Diego School of Law, J.D., 1998
  • University of California, Berkeley, B.S., Environmental Law: Policy and Planning, 1994


  • California
  • U.S. District Court, Southern District of California
  • U.S. District Court, Central District of California
  • U.S. District Court, Northern District of California
  • U.S. District Court, Eastern District of California

Speaking Engagements

  • Orange County Bar Association’s Bridging the Gap CLE, Unlawful Detainers In Landlord-Tenant Situations, 2011
  • Orange County Bar Association’s Bridging the Gap CLE, Unlawful Detainers In Landlord-Tenant Situations, 2010


  • Super Lawyer 2020
  • Super Lawyer Rising Star, 2013-2014, 2017-2019
  • Orange County Magazine, listed as a Top 25 Up-And-Coming Attorney, 2019-2020