Our Attorneys

Greg Trimarche

Phone: (949) 232-1210
Email:  gtrimarche@ringbenderlaw.com

2 Park Plaza, Suite 550
Irvine, CA  92614


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Gregory D. Trimarche

Greg’s practice focuses on environmental law, commercial litigation, and technology.  His over twenty-five years of litigation experience includes environmental, land use and real estate matters; technology and intellectual property matters; business torts; insurance coverage; a wide range of other commercial litigation matters; and white collar criminal defense.  He has extensive trial experience in state and federal courts and arbitration tribunals, as well as hearings before a wide range of local, state and federal governmental bodies.  He also has represented redevelopment agencies, housing agencies, and a variety of other governmental and quasi-governmental entities.

His environmental experience includes countless litigation matters, as well as a regulatory compliance and enforcement actions under virtually every significant federal and California environmental statute, including but not limited to the federal Clean Air Act and Clean Water Act, CERCLA, RCRA, CEQA, and Prop 65.  He also has extensive experience in “Brownfield” transactions (the cleanup, redevelopment and transfer of environmentally-impaired properties), as well as the environmental aspects of mergers, acquisitions, and other transactions.  He has significant experience in siting and permitting major facilities, including energy, water treatment, and other infrastructure projects. Greg has served as the Chair of both the State Bar of California Environmental Law Section (2001 – 2002) and the Los Angeles County Bar Association Environmental Law Section (2000 – 2001).

Greg also provides a wide range of legal services to technology companies (particularly early-stage companies in the clean technology (“cleantech”) industry), including corporate planning and strategic business advice, risk management, and dispute avoidance and resolution.  He negotiates and drafts technology-related contracts, including agreements involving technology transfer, software and other technology licensing and/or development, and strategic partnering.

From 2010 to 2015, Greg served as President of Cleantech OC, the cleantech trade association serving Orange County, California. He also has served on the Board of Directors of OCTANe, the fundraising and networking organization for Orange County’s technology industries, as well as the Board of Trustees of the Laguna Art Museum.

Greg’s past law firm experience includes time as a partner in the Orange County, California office of Bryan Cave (where he served as head of the litigation department), and as a shareholder in the Santa Monica and Orange County, California offices of Greenberg Traurig.

Professional Affiliations

  • CleanTech OC – Chairman and President, 2010 – 2015
  • OCTANe – Board of Directors, 2011 – 2015
  • Los Angeles County Bar Association – Chair, Environmental Law Section, 2000-2001; Environmental Law Section Executive Committee, 1995-2005
  • State Bar of California – Chair, Environmental Law Section, 2001-2002; Environmental Law Section Executive Committee, 1997-present
  • CAL-EPA Brownfield Task Force Committee – Member, 2002-2004
  • Urban Land Institute (Orange County District Council) – Member, Executive Committee; Co-chair, Programs, 2004-2009
  • Lambda Alpha International, Honorary Land Economics Society – Member, 2007-2009

Civic Involvement and Distinctions

  • Southern California Super Lawyer, 2004 – 2011
  • Laguna Art Museum – Board of Trustees, Member; Executive Committee Member


  • University of Kansas, B.A., 1986
  • University of Kansas School of Law, J.D., 1989


  • California, 1989
  • United States District Courts for the Central, Eastern, Northern, and Southern Districts of California
  • United States Court of Appeals for the Ninth Circuit