O’Melveny Worldwide

Matthew M. de Koeyer

Associate

Areas of Focus
Areas of Focus

Matthew de Koeyer is a litigation associate in O’Melveny’s Newport Beach office, with experience representing and advising clients in a broad range of commercial, consumer, and environmental matters.

Matthew has experience representing clients in complex commercial contract and mergers and acquisitions disputes. He also advises clients on compliance with environmental laws, including the California Environmental Quality Act (CEQA), Sustainable Groundwater Management Act (SGMA), and California Water Code.

Prior to joining O’Melveny, Matthew completed an internship with the Orange County District Attorney’s Office and Councilmember Mike Bonin of the City of Los Angeles.

Commercial

  • Counseled major medical device manufacturer in commercial contract and merger and acquisition-related disputes.

Consumer

  • Assisted in counseling client on issues related to per- and polyfluoroalkyl substances (PFAS) in consumer packaging.

Environmental

  • Counseled agricultural land owner on compliance with water system sharing agreement entered into with neighboring landowners.
  • Advised client on compliance with the California Environmental Quality Act (CEQA) and California Water Code for a proposed water project.
  • Supported water rights due diligence for large ranch acquisition in Southern California.
  • Assisted in advising infrastructure investor on compliance with federal and state water laws, including the Clean Water Act and Rivers and Harbors Act, for a proposed dam construction project in Arizona.
  • Assisted in counseling real estate investor on water rights issues under California’s Sustainable Groundwater Management Act (SGMA).

Languages

  • Spanish

Admissions

Bar Admissions

  • California

Court Admissions

  • US Court of Appeals, Ninth Circuit

Education

  • University of California at Los Angeles, J.D.: Managing Editor, UCLA Journal of Environmental Law and Policy
  • University of California at Los Angeles, B.A., Public Affairs

Professional Activities

Memberships

  • Federal Bar Association
  • Orange County Bar Association

Internships

  • Orange County District Attorney’s Office
  • City of Los Angeles, Councilmember Mike Bonin