Noah Perch-Ahern

Fax 310-201-4441


Noah Perch-Ahern, a Partner in Greenberg Glusker's Environmental Department, maintains a broad national environmental and energy practice involving complex litigation, regulatory counsel, and transactional matters. Noah has represented clients in numerous high-stakes matters and is often tapped to work on complex cases and disputes without an easy solution.

“My goal, at every juncture, is achieving client success. Whether preparing for a jury trial or assisting a client with a critical development project or major deal, every strategic decision I make is not only based on a complete understanding of the relevant legal framework and the key points of persuasion, but fundamentally, the relationship of the strategy to a final successful outcome for the client.”

Having deep knowledge across the field of environmental law, Noah employs his skills and knowledge in a variety of contexts. He has significant litigation experience and has tried jury and bench trials. At the same time, Noah regularly helps clients devise solutions to difficult regulatory problems, represents clients in connection with administrative proceedings and enforcement matters, assists clients with deals and development projects, and represents clients in connection with energy-related transactions.

Noah has played a key role in a variety of high stakes matters, including cost recovery and tort actions involving Superfund sites, constitutional litigation, public utility litigation, appellate litigation, environmental remediation projects, portfolio deals concerning electric generation facilities, landfills, and downstream petroleum assets, development projects related to renewable energy projects and industrial expansion, and compliance, permitting, and enforcement matters concerning air quality, water quality, hazardous waste, and energy and utility regulation. Noah has counseled clients concerning all of the major federal environmental statutes, including CERCLA, RCRA, the Clean Water Act, the Clean Air Act, and NEPA, and has also advised clients concerning various state environmental statutes and regulations around the country, including regulatory programs related to climate change and cap-and-trade, coastal regulations, Brownfield laws, water rights, and land use regulations such as CEQA.  A significant portion of Noah’s work involves complex air quality matters and sophisticated regulatory challenges.

Noah augments his practice through his leadership in a variety of organizations focusing on environmental and energy issues, through which he works with key decision-makers of environmental and energy regulatory initiatives.

Professional Affiliations

  • Young Professionals in Energy Los Angeles (YPE), President
  • Southern California Water Committee (SCWC), Board of Trustees
  • Valley Industry and Commerce Association (VICA), Board of Directors
  • TreePeople, Board of Directors
  • Los Angeles Area Chamber of Commerce, Co-Chair of Water, Energy & Environmental Sustainability Council


  • Benchmark Litigation, “Future Star,” 2018 - 2023
  • Next Generation Lawyer of the Year, Century City Bar Association, 2018
  • Southern California Super Lawyers, Rising Stars, 2018 - 2020

Bar Admissions

  • California, 2009
  • District of Columbia, 2007

Court Admissions

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


  • Tulane University  (J.D., magna cum laude)
  • University of New Hampshire  (B.A., summa cum laude)
    • Political Science
    • Phi Beta Kappa