John Rousakis


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John helps his clients to evaluate and manage environmental risks and spot opportunities in an increasingly complex regulatory landscape.

He represents clients on acquisitions and divestitures of industrial, energy, transportation, telecom and other businesses, on infrastructure development and real estate projects, and in federal and state Superfund matters. He also provides strategic and regulatory counseling on a range of environmental, health and safety and ESG matters, including development of ESG programs and policies.


Honors & Awards

  • Recognized by The Legal 500 US in Environment: Transactional (2020-2022)
  • Recommended in Environment by Who's Who Legal (2019)
  • Recognized in Chambers USA - Environment: Mainly Transactional (2018-2022)
  • America’s Leading Business Lawyers, Chambers USA (2008-2011)


Bar Admissions

  • New York

Court Admissions

  • US District Court, Eastern and Southern Districts of New York


  • New York University, J.D.; Editor-in-Chief, NYU Environmental Law Journal
  • Princeton University, B.S.E., Civil Engineering: magna cum laude

Professional Activities


  • New York City Bar, Committee on International Environmental Law (2006-2009)


  • New York City Bar, Committee on Environmental Law (2016-present) 

Board Member

  • Greenway Conservancy for the Hudson River Valley (2001-2010)


  • “SEC Sues Mining Company Based on ESG Disclosures,” Insights: The Corporate & Securities Law Advisor (July 2022)
  • “Environmental Law,” Corporate Legal Departments: Practicing Law in a Corporation, PLI co-author (2022)
  • “International Environmental Law," International Corporate Practice: A Practitioner's Guide To Global Success,” PLI (2022)
  • “Corporate Compliance Challenges: Environment, Corporate Compliance Practice Guide: The Next Generation of Compliance,” LexisNexis, co-author (2022)
  • “As Trump Administration Attempts to Roll Back Environmental Regulations, Past Lessons Are Prologue,” New York Law Journal (December 19, 2018)
  • “Environmental Counseling in Divestitures,” Westlaw Journal Mergers & Acquisitions (June 2018)
  • “The Price of Greenhouse Gas Legislation,” Environmental Law360 (October 5, 2009)
  • “Exploring the Carbon Trading Landscape,” New York Law Journal (July 16, 2007)


  • “Green Finance: Leveraging Investment for Environmental Protection,” Environmental Law Institute (June 2017)
  • “Major Developments in EU Environmental Law,” New York City Bar Center for CLE, Chair and Speaker (October 2006)
  • “International Issues in Environmental Auditing,” Auditing Roundtable NY Regional Meeting (September 2006)
  • “Recent Developments in EU Environmental Law,” Pennsylvania Bar Institute Environmental Law Forum (April 2005)
  • “Environmental Policies for Lending Institutions,” EDR Financial Services' Environmental Risk Summit (October 2004)

Transactional Matters 

  • Apollo Global Management in multiple acquisitions, including its acquisitions of Tenneco, Univar, ABC Technologies, Novolex, Atlas Air, Sun Country Airlines, Ingenico, Constellium, Xstrata Aluminum, Verso Paper, Borden Chemical, Parallel Petroleum, Jacuzzi Brands, Rexnord, Berry Plastics, Graanul Invest, ClubCorp, Constellis, and Rackspace, 
  • LaGuardia Gateway Partners in the redevelopment and long-term operation of the Central Terminal Building at New York LaGuardia Airport
  • JFK Millennium Partners in the redevelopment of JFK Airport Terminal 6
  • The City of Miami in the development of the Miami Freedom Park stadium and related commercial and recreational assets
  • TTM Technologies in its acquisitions of Anaren Inc. and Telephonics
  • DL Chemical in its acquisition of Kraton Corporation
  • Microsemi Corporation in its acquisition of Vectron International
  • Palladium Equity Partners in its acquisition of American Gilsonite Co.

Site Remediation and Litigation Matters

  • Nu-West Industries in connection with the investigation and remediation of former phosphate mine sites in Southeast Idaho 
  • American Airlines in the defense of a State enforcement proceeding related to the remediation of soil and groundwater in connection with the redevelopment of JFK Terminals 8 and 9, and in the related contribution action for recovery of remediation costs
  • Combe Fill South Landfill NPL Site (Chester Township, NJ):  Common counsel for 14 defendants in US$200 million cost recovery action by USEPA and the State of New Jersey
  • Gulf Nuclear Sites (Webster, Texas):  Defense of industrial entity in cleanup cost recovery action brought by USEPA and State of Texas
  • BEMS Landfill (Burlington County, NJ):  Defense of commercial entity in multiparty landfill cleanup cost recovery action initially brought by NJDEP

Alerts and Publications

EPA Proposes New Greenhouse Gas Emissions Standards for Fossil Fuel-Fired Power Plants

May 23, 2023

EU Proposes New “Green Claims Directive” Targeting Greenwashing in Consumer Products

April 18, 2023

US and International Development in Plastics Stewardship Law and Policy

April 4, 2023

Mining Company Agrees to Pay US$56 Million to Settle SEC ESG Disclosure Suit

March 31, 2023

Environmental Justice Update (March 2023)

March 16, 2023

Maritime Environmental Law Update (March 2023 Edition)

March 13, 2023

Practice What You Preach: As ESG Expectations Rise, So Do the Risks of Not Measuring Up

February 13, 2023

Insights 2023

January 31, 2023

EU to Impose Carbon Border Tax on Imported Products

January 10, 2023

DOL Issues Final ESG Rule, Allowing Latitude for Fiduciaries to Consider Environmental, Social, and Governance (ESG) Factors

December 12, 2022

Environmental Justice Update (October 2022)

October 17, 2022

Inflation Reduction Act Adds First-time Charge for Methane Emissions for the Oil and Gas Sector

August 16, 2022

California Enacts Plastics Legislation, Highlighting Global Focus on Plastics Recycling and Waste Reduction

August 4, 2022

New Restrictions on Imports Manufactured With Forced Labor Take Effect

June 24, 2022

EPA Publishes Guidance on Legal Tools to Advance Environmental Justice

June 8, 2022

SEC Steps Up ESG Enforcement and Issues Proposed Rule on Diligence and Disclosure for ESG and Impact Funds

June 3, 2022

Department of Justice Launches Comprehensive Environmental Justice Strategy

May 9, 2022

SEC Sues Mining Company Based on ESG Disclosures

May 4, 2022

SEC and International Sustainability Standards Board Head Toward Uniform Disclosure of ESG-Related Information

April 14, 2022

FERC Issues Pause in Natural Gas Pipeline Policy Statements as the White House Announces an Initiative for Increasing LNG Exports to Europe and the D.C. Court of Appeals Provides Guidance on Consideration of Greenhouse Gas Emissions

March 25, 2022

FERC Issues New Policies for Review of Applications for New and Modified Natural Gas Pipelines, Including Consideration of Greenhouse Gas Emissions for Pipeline and LNG Facilities

February 22, 2022

California’s New Organic Waste Diversion Rules Take Effect

January 12, 2022

In the News

Global Legal Chronicle: JFK’s US$4.2 Billion New International Terminal 6 Development Project

November 22, 2022

Informed Infrastructure: O’Melveny Advises on US$4.2 Billion Deal to Develop New International Terminal 6 at John F. Kennedy International Airport

November 21, 2022

The Bond Buyer: JFK’s Latest P3 Terminal Deal Marks ‘Final Piece’ of Airport Transformation

November 18, 2022

Infralogic: JFK Terminal 6 P3 Reaches Financial Close

November 17, 2022

Law360: US$4.2B JFK Terminal To Break Ground Next Year, NY Gov. Says

November 17, 2022

Wolters Kluwer: Insights: SEC Sues Mining Company Based on ESG Disclosures

July 19, 2022

New York Law Journal: Blockchain-Focused Funds Partner Barbara Warren Joins Goodwin

December 22, 2021

Australasian Lawyer: 13 Pump Up O’Melveny’s 2022 Global Partnership

December 16, 2021

Press Releases