Environment: transactional in United States

Cravath, Swaine & Moore LLP

Cravath, Swaine & Moore LLP provides comprehensive legal services covering all environmental issues arising from M&A and financings, including green and sustainability awareness bonds. The practice group is frequently retained by clients across a multitude industries, including pharmaceuticals, retail, heavy manufacturing and  chemicals, to advise on environmental liabilities in the context of business transactions. It also assists with the management of post-closing obligations, mass toxic tort matters and environmental-related contractual disputes. Practice head Matthew Morreale is a renowned practitioner in environmental law who has been involved in numerous multibillion-dollar transactions spanning all core industries in the US and internationally. Disclosure obligations under securities laws, ESG concerns and emerging climate change issues are some of Morreale's core areas of expertise. Also recommended is Annmarie Terraciano, whose expertise covers sustainability reporting and environmental indemnification disputes.

Practice head(s):

Matthew Morreale

Other key lawyers:

Annmarie Terraciano


‘Cravath has a very practical approach to problem solving in M&A transactions.’

‘Cravath’s group has the demonstrated ability to problem solve and seek clever resolution to difficult M&A situations to prevent them from becoming roadblocks.’

‘Annmarie Terraciano is extremely responsive and practically-oriented.’

Key clients

Avon Products



Just Eat Takeaway.com


Lindsay Goldberg


Parker Hannifin

US Foods


Work highlights

  • Advised Mylan N.V. on the environment law aspects of its $50bn combination with Upjohn, Pfizer Inc.’s off-patent branded and generic established medicines business, forming the new global pharmaceutical company Viatris Inc.
  • Assisting Just Eat Takeaway.com N.V. with the environmental law aspects of its pending $7.3bn acquisition of Grubhub Inc.
  • Advising Centrica plc on the environmental law aspects of its pending $3.63bn sale of its North American energy supply, services and trading business to NRG Energy, Inc.

Davis Polk & Wardwell LLP

Based in New York, Davis Polk & Wardwell LLP's environment team stands out for its breadth of practice and seamless integration with other departments in the firm. It is prepared to develop commercially minded solutions to environmental issues in relation to the entire scope of transactions, including M&A, finance, insolvency and restructuring, real estate and cross-border project finance. Core strengths for the team include advising investment banks and corporate clients on environmental disclosure matters and SEC reporting requirements in the context of IPOs, and debt and equity offerings. The team is also recognized for its experience in cutting-edge ESG matters, climate change and alternative energy issues. Practitioners demonstrate a deep understanding of industry-wide trends that enables them to act for a variety of clients in highly-regulated sectors such as energy, manufacturing and construction. Loyti Cheng is very highly regarded for advising on environmental and toxic tort analysis, contractual allocation and sustainability issues arising from corporate transactions. She leads the team with sustainability expert Betty Huber, who oversees the firm's ESG group.

Practice head(s):

Loyti Cheng; Betty Huber

Other key lawyers:

Michael Comstock

Key clients


Aptiv PLC

BDT Capital Partners


Cornell Capital

Emerson Electric

The Ferrero Group


GHK Capital partners

Kyocera Corporation

Morgan Stanley

Reynolds Group Holdings

VF Corporation

Kirkland & Ellis LLP

Kirkland & Ellis LLP handles a steady flow of high-value mandates, focusing on the environmental aspects of corporate transactions, contamination concerns and issues pertaining to compliance with environmental regulations. Recent highlights demonstrate practitioners' capabilities in assisting with environmental compliance and liabilities issues in the context of M&A, financing deals, real estate and private equity investments. Furthermore, the team is often called upon to act as lead environmental counsel in high-profile restructuring and bankruptcy matters. Key contact Paul Tanaka splits his time between San Francisco and Houston, and is particularly proficient in transactions involving industrial, energy and infrastructure assets. Energy-related deals are a core strength for Alexandra Farmer in Washington DC, who is noted for her experience handling significant contamination issues and permitting obligations. Also recommended in DC is Jennie Morawetz, who has broad experience of environmental law, often advising on ESG policies. Jonathan Kidwell in Dallas has been crucial in the growth of the environmental practice in Texas, and is regularly retained by clients in the waste management, heavy manufacturing, and energy sectors.

Other key lawyers:

Paul Tanaka; Alexandra Farmer; Jonathan Kidwell; Jennie Morawetz; Stefanie Gitler; Toby Chun; Sara Michaelchuck Webber

Key clients

Ares Management

Blackstone Energy Partners

Brookfield Super-Core Infrastructure

Callon Petroleum Company

Cambrex Corporation

Chesapeake Energy

Danaher Corporation

Delphi Technologies

Fortress Investment Group

Hilcorp Alaska

Huntsman Corporation

Madison Dearborn Partners

McDermott International

Murray Energy

Parsley Energy

Partners Group

PES Holdings

Schlumberger Limited

WellCare Health Plans

Latham & Watkins LLP

Latham & Watkins LLP is home to one of the biggest environmental law groups in the market, made up of several former senior government officials and experienced environmental attorneys that support the firm's prolific corporate practice on transactions both domestically and internationally. Recognized as global-leading advisers to the private equity sector, the team's client roster further features major international financial institutions and blue-chip corporations operating in highly regulated industries, such as energy, manufacturing and chemicals. Offering coverage from coast to coast, the national environment, land and resources department is under the leadership of James Arnone (Los Angeles) and Janice Schneider (Washington DC). Regulatory and transactional work are overseen by leading carbon lawyer Jean-Philippe Brisson (New York) and Christopher Norton (Orange County). James Barrett routinely leads on major environmental law mandates for top PE and project finance-sector clients from the Washington DC office. Joel Mack, who is noted for his sector expertise in oil and gas, mining and renewable energy, is the key contact in Houston. Based in Orange County, Joshua Bledsoe focuses on climate change, carbon regulatory regimes and renewable projects.

Practice head(s):

James Arnone; Janice Schneider; Jean-Philippe Brisson; Chris Norton

Other key lawyers:

James Barrett; Joel Mack; Joshua Bledsoe


‘Latham & Watkins attorneys are always responsive, thorough, efficient, and knowledgeable. Their regulatory attorneys, such the environmental team, are fully current with the latest regulatory developments, and have strong connections to agency decision-makers that allow them to achieve optimal results. The Latham deal teams also are up-to-date on current market trends, and are fully conversant with the most complex deal structures and processes. Based on our experience, I recommend Latham for any project or legal issue.’

‘Our principal environmental attorney is partner James Barrett, in the DC office. We have worked with James on a number of regulatory and transactional projects. His advice and support have been consistently helpful and timely, always producing optimal results. Over the years, we have worked with Latham associates who have gone on to lead practices of their own within the firm. These relationships have all proven to be valuable to us.’

Key clients

Bain Private Equity

Blackstone Energy Partners

Carlyle Group



Equitrans Midstream





Occidential Petroleum


Shell Midstream Partners

Work highlights

  • Advised Carlyle Group on the acquisition of AkzoNobel’s Specialty Chemicals business at an enterprise value of €10.1bn.
  • Advising Shell Midstream Partners on the environmental aspects of the agreement with its general partners to eliminate incentive distribution rights and general partner economic interests, as well as buy pipeline and logistics assets from sponsor Royal Dutch Shell in a deal valued at $4bn.
  • Representing Occidental in a $500m precedent-setting joint venture that will capture, upgrade, and transport CO2 generated from two ethanol production facilities in Texas owned by White Energy.

Weil, Gotshal & Manges LLP

Weil, Gotshal & Manges LLP fields a well-established environmental practice that is adept at identifying and managing environmental risks both in the transactional context and beyond. Based in Washington DC, the team advises on the environmental aspects of all types of corporate transactions, ranging from M&A and financing deals to special projects involving real estate, infrastructure development, securities and warranties insurance. In addition to traditional corporate work, the team is also recognized for its historical track record in environmentally-sensitive restructuring and bankruptcy cases. Spearheading the department is Annemargaret Connolly, who is highly skilled at addressing environmental issues and potential liabilities to facilitate clients' business objectives. Environmental compliance is another area of activity for the group, which advises on all aspects of climate change and sustainability. Other contacts in DC include counsels Thomas Goslin, who is noted for his in-depth knowledge of the renewable and traditional power generation sector, and Matthew Morton who is trusted by clients from a variety of industries, such as chemicals, manufacturing and waste management. John O’Loughlin is another seasoned practitioner with more than three decades of experience dealing with government agencies.

Practice head(s):

Annemargaret Connolly

Other key lawyers:

Matthew Morton; Thomas Goslin; John O’Loughlin

Key clients

Apergy Corporation (n/k/a ChampionX Corporation)

The Blackstone Group

Brookfield Asset Management

Campbell Soup Company


Credit Suisse

Culligan International Company

Exide Holdings, Inc.

Emerald Performance Materials LLC

Froneri International Limited

Genstar Capital, LLC

Goldman Sachs

Knowlton Development Corporation (KDC/ONE)

Montagu Private Equity LLP

Morgan Stanley

Mudrick Capital Acquisition Corporation

Ontario Teachers’ Pension Plan

Pretium Packaging LLC

Westinghouse Electric Company, LLC

WPX Energy, Inc.

Work highlights

  • Represented Exide Technologies in a challenging environmental corporate transaction which involved a first of its kind global settlement to resolve Exide’s historical environmental liabilities at more than 20 shuttered industrial sites.
  • Acted for Apergy Corporation (n/k/a ChampionX Corporation), a provider of equipment and technologies that improve oil and gas drilling and production efficiency and safety, in a Reverse Morris Trust acquisition of ChampionX (f/k/a Nalco Champion), a supplier of sustainable chemistry programs and services to upstream and midstream oil and gas operators, from Ecolab Inc. creating an entity with a combined $7.4bn enterprise value.
  • Advised Mudrick Capital Acquisition Corporation, a SPAC sponsored by Mudrick Capital, on its acquisition of substantially all of the assets of Hycroft Mining Corporation, a producer of gold and silver from a mine in northern Nevada, with an initial enterprise value of approximately $537m.

Allen & Overy LLP

Standing out for its cross-border capabilities, Allen & Overy LLP brings together its global perspective with thorough knowledge of chemicals regulations, energy, climate change, emissions trading and contaminated land. Apart from providing comprehensive environmental advice in the context of M&A, project finance, capital markets and real estate transactions, the practice is a market leader in ESG matters, including ESG-linked credit facilities and the new Equator Principles. With private equity firms, government agencies and major US corporations at the core of its client base, the New York-based team has a wealth of experience assessing the allocation of environmental risk on all types of major international transactions. Leading the US and international environmental law groups is Ken Rivlin, who was recently selected as the new chair of the New York City Bar committee on international environmental law. Felise Cooper is a seasoned practitioner in EHS matters, and Maria Christopher-Bell advises key infrastructure and PE clients.

Practice head(s):

Ken Rivlin

Other key lawyers:

Felise Cooper; Maria Christopher-Bell; Nick Ognibene

Key clients

General Electric

Under Armour

U. S. Department of Energy

Apollo Global Management

Equator Principles Association

The Carlyle Group

Intermediate Capital Group (IGC)

International Finance Corporation (IFC)


Sabin Center for Climate Change Law of Columbia University

Work highlights

  • Advised Under Armour on ESG strategy and on the development and international release of a new facemark designed for athletic performance, the UA Sportsmask.
  • Assisting the Department of Energy with matters related to several solar power projects.
  • Serves as General Electric’s lead outside transactional environmental counsel and advises the client on environmental risk in many of its major transactions.

Debevoise & Plimpton LLP

Debevoise & Plimpton LLP works on complex domestic and international transactions involving potentially significant environmental issues at facilities located all over the world that are subject to different regulatory regimes. Its impressive track record features high-stakes M&A, securities offerings, financings and other corporate matters within environmentally-sensitive industries such as chemicals, healthcare and manufacturing. In addition to transactional matters, the practice is a strong performer in the ESG field, assisting private equity firms and investment funds in the evaluation of ESG-related risks, initiatives and global climate change issues. Leading the practice is Stuart Hammer in New York who is recommended for helping clients allocate environmental risks associated with their transactions. Also recommended in New York is Harry Zirlin, who often advises on the environmental aspects of real estate and bankruptcy-related matters.

Practice head(s):

Stuart Hammer

Other key lawyers:

Harry Zirlin


‘The D&P environmental team is smaller than some of its legal competitors, which allows for a more personalized touch and focus on deals, which I believe sets them apart. In the last 12-18 months, D&P has been more intentional about internal collaboration across the world, particularly by uniting counsel in New York and London. In addition, D&P has been expanding the breadth of environmental offerings to reflect more recent changes to the transactional process by introducing ESG, sustainability and similar “green” elements into deal reviews where it makes sense.’

‘The main environmental lawyer I deal with at D&P is Stuart Hammer, with whom I have worked with for at least 15 years. Stuart brings an intensity to work that represents a reasonable balance of project urgency with providing a quality work product.’

Key clients

Adare Pharmaceuticals

The Carlyle Group

Cerberus Capital Management

Clayton, Dubilier & Rice

Cornerstone Building Brands

CSN Steel

D.E. Shaw


Elliott Management

JP Morgan Investment Management

Kelso & Company

Morgan Stanley Investment Management

Rank Group

Reynolds Group




Work highlights

  • Advised Clayton, Dubilier & Rice (CD&R) in an agreement in which CD&R funds will lead an investment to acquire HD Supply Holding Inc.’s Construction & Industrial-White Cap business for $2.9bn and combine it with The Construction Supply Group.
  • Advised Clayton, Dubilier & Rice on its proposed $4 bn take private acquisition (later terminated) of Anixter International, a NYSE-listed company.
  • Advised Clayton, Dubilier & Rice and Brand Industrial Services on its definitive agreement with Brookfield Business Partners L.P., for Brookfield to acquire half of CD&R’s ownership interest in BrandSafway.

O'Melveny & Myers LLP

O'Melveny & Myers LLP's environmental and natural resources practice combines expertise in environmental issues arising in high-value transactions with extensive experience in litigation and regulatory proceedings. The transactional service offering not only covers due diligence assessments but also includes permitting applications, agency approvals and environmental compliance reviews. The team boasts a strong following in the private equity sector, but is best known for its involvement in large-scale development projects and M&A deals. Based in New York, practice head Eric Rothenberg leverages his experience as a trained environmental engineer to advise on environmental transactional and adversarial matters. Also in New York, John Rousakis is called upon to assist with transactions involving the chemicals, mining, oil and gas and manufacturing industries. Kelly McTigue is a key contact in Los Angeles whose areas of focus include climate change, reporting obligations and permitting issues.

Practice head(s):

Eric Rothenberg

Other key lawyers:

Kelly McTigue; John Rousakis

Key clients

American Airlines

Apollo Global Management

Bank of America

California High Speed Rail Authority

Exxon Mobil Corporation

First State Investments

JetBlue Airways Corporation

Kern Cal Oil 7

Terminal One Group Association

Vantage Airport Group

Work highlights

  • Represented Apollo Global Management Fund IX in its acquisition of Tech Data Corporation (NASDAQ: TECD), one of the world’s largest technology distributors.
  • Acted for Apollo Global Management’s special purpose acquisition company, Spartan Energy (NYSE: SPAQ), in its announced merger agreement with Fisker, Inc., an electronic vehicle manufacturer.
  • Currently representing a number of investors, teams and public entities in connection with stadium development, including the State of Hawaii, in connection with the redevelopment of Aloha Stadium, including a new stadium and 2.5 million square feet of mixed-use ancillary development adjacent to the stadium, featuring hotel, office and commercial spaces.

Simpson Thacher & Bartlett LLP

Simpson Thacher & Bartlett LLP is recognized for providing cutting-edge environmental advice to a diverse range of clients active in environmentally-sensitive industries, which are looking to pursue business opportunities in the US and abroad. The practice benefits from close collaboration with the firm's corporate department, being routinely called upon to assist with the allocation of environmental risks, regulatory issues including those involving climate change and sustainability, and liabilities arising out of environmental impairment. Furthermore, the attorneys are regularly acting in M&A, capital markets and financing deals. Adeeb Fadil sits in the Washington DC office and has a strong background in cross-border transactions involving the energy, chemicals, manufacturing, waste management and pharmaceutical sectors. Fellow co-head Mike Isby focuses on environmental law compliance in major transactions and is based in New York.

Practice head(s):

Adeeb Fadil; Mike Isby

Key clients

AMERGINT Technologies

Apax Partners

The Blackstone Group LP

BorgWarner Inc.

Centerbridge Partners

Genesee & Wyoming

Goldman, Sachs & Co.

Harsco Corporation

Hellman & Friedman

Hovnanian Enterprises

Ingersoll Rand

Johnson Controls International plc

J.P. Morgan Chase

Kohlberg Kravis Roberts & Co.

Microsoft Corporation

PPL Corporation

Quirch Foods Holdings

Silver Lake Partners

Stonepeak Infrastructure Partners

Snow Phipps

Vivint Solar

Waste Management, Inc.

Skadden, Arps, Slate, Meagher & Flom LLP

The environmental and climate change practice group at Skadden, Arps, Slate, Meagher & Flom LLP advises on a wide range of environmental matters spanning domestic and cross-border transactions. Recent mandates saw the Washington-DC team advising on the assessment of environmental liabilities and risks, insurance policies, remediation requirements and compliance issues in the context of mergers, asset sales, joint ventures and financings involving global leading players in the chemicals, energy, pharmaceutical, infrastructure and technology sectors. Also noteworthy is the department's experience in complex project development, where lawyers routinely assist with the implementation of strategies to secure governmental approvals, and environmental emission and discharge permits. The department is headed up by Elizabeth Malone, whose areas of expertise include post-closing cleanup matters and sustainability issues.

Practice head(s):

Elizabeth Malone

Other key lawyers:

Henry Eisenberg

White & Case LLP

White & Case LLP supports domestic and international clients on a host of environmental matters relating to transactions and projects. Drawing on the firm's global footprint, the team advises on headline-grabbing transactions, ranging from portfolio deals, M&A, financing and renewable energy projects, and possesses a loyal base of key private sector, governmental and non-profit clients. The group is not solely made up of environmental deal lawyers, but rather includes individuals whose experience spans environmental regulatory compliance, remediation programs, litigation, international climate change and cutting-edge sustainability issues. The nationwide environmental group is led by Seth Kerschner in New York, who regularly coordinates environmental due diligence assessments in relation to transactions in the chemical, energy, pharmaceutical and private equity sectors. Also in New York, Laura Mulry acts for clients throughout all steps of their sustainability journeys.

Practice head(s):

Seth Kerschner

Other key lawyers:

Laura Mulry


‘White & Case has provided the best legal services that our ten-year old environmental nonprofit organization has ever experienced. They are a superior legal team. White & Case provided pro bono legal services to our environmental nonprofit organization. They helped us to negotiate two consulting services agreements concurrently with a publicly traded corporation. In this negotiation, we were David vs. Goliath. With legal counsel from White & Case, we successfully protected our organization’s needs and obtained the language and provisions that we sought in this negotiation. Their overall service was superlative. Short of curing COVID, White & Case could do nothing more to improve its services for us.’

‘With respect to innovations, White & Case is a leader in corporate ESG advisory services, which are of particular interest to our environmental organization.’

‘Laury Mulry is our primary attorney and is supported by partner Seth Kerschner. They provided outstanding legal counsel throughout our negotiations, which took more than two years. Laura’s thorough legal assessments and wise guidance enabled us to maintain firm but reasonable positions on these issues. She was also highly professional, poised, and perceptive with a counter-party that was mercurial and frustrating at times throughout the negotiations.’

Key clients

Saudi Arabian Oil Company (Saudi Aramco)

Calpine Corp.

Abu Dhabi Future Energy Company PJSC “Masdar”

Sempra Energy

Macquarie Infrastructure and Real Assets Inc.

Lantheus Holdings, Inc.

Conservation Law Foundation, Inc.

DIC Corporation

Macquarie Infrastructure Partners II

Pfizer Inc.

The Sabin Center for Climate Change Law

Work highlights

  • Served as lead environmental counsel to Saudi Aramco, the world’s largest oil company, in the record-breaking $69.1bn acquisition of Saudi Basic Industries Corporation (SABIC).
  • Acted as environmental counsel to Calpine Corp. in a $1.1bn climate bonds initiative certified financing of its wholly-owned subsidiary, Geysers Power Company, LLC (Geysers), the owner of 13 geothermal electric generating facilities in Northern California.
  • Serves as environmental counsel to DIC Corporation, a Japanese chemical company that operates in over 60 countries, in its acquisition of the global pigments business of the German company BASF, BASF Colors & Effects.

Bracewell LLP

Bracewell LLP's environmental strategies group is proficient across a range of transactional work, notably deals involving the energy and industrial sectors. Split between Washington DC and Texas, the team of dedicated environmental lawyers has over the years developed a strong track record advising on large-scale projects concerning air, water, waste and infrastructure development. The group is led out of the DC office by litigator Jason Hutt and Jeffrey Holmstead, the latter of whom is noted for his in-depth knowledge of climate change regulations. Based in Austin, Timothy Wilkins is skilled at representing companies in strategic environmental permitting matters.

Practice head(s):

Jason Hutt; Jeffrey Holmstead

Other key lawyers:

Timothy Wilkins

Key clients

Equinor (f/k/a Statoil)

Par Pacific

Prosperity Bancshares, Inc.

J&J Worldwide Services

Kinder Morgan, Inc. and Kinder Morgan Canada Limited

COG Operating LLC, a subsidiary of Concho Resources, Inc.

TC Energy Corporation

Bristow Group Inc.

Phillips 66

Juniper Capital Advisors, L.P.

Work highlights

  • Advises Equinor on numerous aspects of its US offshore wind development portfolio, including permitting and environmental impact analysis.
  • Represented Par Pacific in a stock acquisition respecting a petroleum refinery in Tacoma, Washington, and in an asset acquisition with respect to significant refining assets in Kapolei, Hawaii, including in connection with the environmental aspects of both transactions.
  • Acted for Prosperity Bancshares, Inc., in its acquisition of LegacyTexas Financial Group, Inc.

Cahill Gordon & Reindel LLP

Cahill Gordon & Reindel LLP is singled out as a leading environmental player in financing and capital market transactions. Covering domestic and international law, the New York-based practice is active in all core industry sectors, including environmentally sensitive businesses such as mining, petroleum refining and heavy manufacturing. The group also boasts a strong reputation for its expertise in identifying ESG risks, and has in the past year enhanced its due diligence review to help clients understand potential health and safety liabilities as a result of the Covid-19 pandemic. The practice group is overseen by Gregory Battista, whose extensive experience spans EHS compliance, SEC disclosures, climate change regulations and remediation. Also recommended are associates Peter Gioello and Lynn Schmidt.

Practice head(s):

Gregory Battista

Other key lawyers:

Peter Gioello; Lynn Schmidt


‘Strong environmental transactional team. Often represent lenders and focus in on the key commercial issues.’

‘I work with Peter Gioello often. He’s commercial and market-savvy. Focuses  on important and material items. Lynn Schmidt is also strong.’

‘Greg Battista and his team are top notch EHS transactional attorneys with significant expertise in financing transactions. Peter Gioello and Lynn Schmidt are quality lawyers with significant EHS experience and knowledge, but also are deal savvy and able to work collaboratively with other counsel to find resolution.’

‘Greg Battista is senior attorney with a sophisticated approach to evaluating and resolving issues and working well with opposing counsel. Peter Giorello is an up and coming EHS lawyer that is easy to work with, thoughtful in his questioning, and helpful in working to a resolution. Lynn Schmidt is bright, capable, and who can cover areas beyond just contamination.’

Key clients

J. P. Morgan

Credit Suisse

Citigroup Global Markets Inc.

Deutsche Bank

Morgan Stanley

Wells Fargo


Truist Securities, Inc.

Work highlights

  • Represented the initial purchasers in connection with a $400m debt offering for New Gold, a Canadian mining company that owns and operates the New Afton gold-silver-copper mine in British Columbia and the Rainy River gold-silver mine in Ontario, Canada.
  • Advised the initial purchasers on several notes offerings totaling $3.2bn and €200m for Standard Industries, Inc., a building materials company.
  • Represented the initial purchasers in connection with a $2.5bn senior notes offering by Georgia-Pacific LLC, a global diversified forest products company owned by Koch Industries, Inc.

Paul, Weiss, Rifkind, Wharton & Garrison LLP

Paul, Weiss, Rifkind, Wharton & Garrison LLP is well positioned to advise a balanced roster of stakeholders, including buyers, sellers, lenders, underwriters and issuers of securities, engaged in high-value domestic and cross-border transactions. Environmental experts form interdisciplinary teams with members of the firm's other departments to successfully navigate environmental issues that arise in strategic M&A, financings, real estate deals and joint ventures. Moreover, the team is also sought out for assistance with a range of sustainability concerns as ESG issues increasingly become subject to close public and regulatory scrutiny. Practice head William O’Brien (New York) is a member of the firm's climate change working group, and advises public and private companies on the environmental aspects of their most impactful investments.

Practice head(s):

William O’Brien

Other key lawyers:

Deepa Sarkar

Proskauer Rose LLP

Proskauer Rose LLP's environmental group handles a significant domestic and international workload, covering all aspects of environmental law in the context of M&A, finance, capital markets, bankruptcy and real estate transactions. Many of these deals take place in highly scrutinized industries (chemicals, pharmaceutical, life sciences and telecoms), and involve extensive environmental due diligence, multi-facility agreements and permit transfer issues. Gail Port is the head of the department; she has extensive experience handling environmental risks in complex corporate transactions and environmental compliance matters. Senior counsel Aliza Cinamon often advises US and global clients on risk allocation and climate change issues. Both attorneys are based in New York.

Practice head(s):

Gail Port

Other key lawyers:

Aliza Cinamon

Key clients


Bed Bath & Beyond Inc.

Charles B. Wang Community Health Center



Grifols, S.A.

Not-for-Profit Environmental Clients

Teva Pharmaceuticals USA, Inc. and Various Subsidiaries

The Rector, Church-Wardens and Vestrymen of Trinity Church, in the city of New-York

The Statutory Unsecured Claimholders Committee of Westinghouse Electric Company, LLC

Underwriters’ Counsel for Casella Waste Systems Inc.

Sidley Austin LLP

Sidley Austin LLP handles domestic and cross-border deals, assisting clients with environmental risk allocation in corporate transactions spanning a range of highly regulated industries. Global co-head of the environmental practice Justin Savage in Washington DC and Byron Taylor in Chicago are contacts in the team.

Sullivan & Cromwell LLP

Sullivan & Cromwell LLP provides environmental support to a variety of clients engaged in project development, M&A and financing transactions. Matthew Brennan in New York is recommended.

Vinson & Elkins LLP

Vinson & Elkins LLP has built a reputation for securing key approvals for development projects in the energy sector, often involving contested air, water and wetlands permits and NEPA lands. Much of the work handled in this space is led from the firm's Houston office, which has noted strengths in structuring transactions to minimize environmental risks and negotiating outcomes that avoid litigation. Key contacts in Texas are co-head Larry Nettles and Matthew Dobbins, who are seasoned in environmental liability allocation in the context of large business transactions. The environmental practice continues to grow its presence in Washington DC, where names to note include Ronald Tenpas and Margaret Peloso, who focuses on climate change risk management.

Practice head(s):

Larry Nettles; Ron Tenpas

Other key lawyers:

Matthew Dobbins; Margaret Peloso; George Hopkins

Key clients

Popular Bank

Riverstone Holdings LLC

Blackstone Infrastructure Fund

Altivia Chemicals LLC

Apollo Global Management, Inc.

Basalt Infrastructure Partners

Gulf Coast Ammonia

Pinto Realty Partners, Ltd.

Caerus Oil and Gas, LLC

The Carlyle Group and its affiliate Cardinal Renewables, LLC

Goldman Sachs

SoftBank and its affiliate SB Energy.

Noble Energy, Inc.

Texas Deepwater Port, LLC

Enviva Partners

New Fortress Energy

Work highlights

  • Assisting Popular Bank (formerly known as Banco Popular) with resolving environmental contamination issues to facilitate the sale of a property in San Antonio, Texas.
  • Advised Riverstone on all aspects of potential environmental liabilities resulting from the acquisition of four coal-fired power plants located in Germany and the Netherlands.
  • Served as lead environmental counsel on Blackstone Partner’s new infrastructure fund’s inaugural investment in Tallgrass Energy Partners, one of the nation’s largest transmission pipeline owners.

Dechert LLP

Working in close collaboration with the firm's offices around the globe, Dechert LLP's Philadelphia-based environmental group advises clients on the environmental implications of acquisitions and divestitures of businesses, real estate investments and financing transactions. Of particular note, the team has significant experience in relation to the environmental aspects of infrastructure projects, assisting with environmental site assessments and permitting matters. Leading practitioner Abbi Cohen heads up the practice that also includes John Ix; both bring to the table a blend of transactional and environmental regulatory compliance expertise.

Practice head(s):

Abbi Cohen

Other key lawyers:

John Ix

Key clients

Ahead Inc.

B&G Foods Inc.

Cerberus Capital Management

Court Square Capital Partners


Graham Partners


One Equity Partners

Ridgemont Equity Partners

US Ecology

Work highlights

  • Advised Ahead, Inc., a portfolio company of Court Square Capital Partners, on its sale to Centerbridge Partners, and on its acquisitions of RoundTower Technologies and Kovarus, as well as other strategic acquisitions.
  • Assisted US Ecology, Inc. (NASDAQ: ECOL), a leading North American provider of environmental services to commercial and government entities, in its acquisition of NRC Group Holdings Corp. (NYSE: NRCG).
  • Representing Conterra Ultra Broadband Holdings Inc. and Court Square Capital Partners in connection with the sale of Conterra to Fiera Capital Corporation (TSX: FSZ) and APG Group NV.

King & Spalding LLP

King & Spalding LLP offers legal support to lenders, underwriters and investors on a litany of business transactions in the US and abroad. Supporting the firm’s prolific energy practice, the environmental team is particularly active in transactions in the oil and gas, LNG, petrochemicals and renewables sectors, including project financing. Another key feature of the department is its work for private equity firms in relation to their portfolio deals. Based in Washington DC, Granta Nakayama leads the nationwide practice group; Cynthia Stroman is a contact for  environmental transactional issues involving the energy and chemicals sectors; and Joseph Eisert is a go-to lawyer for private equity clients.

Practice head(s):

Granta Nakayama

Other key lawyers:

Cynthia Stroman; Joseph Eisert; Les Oakes

Key clients

Mueller Water Products Inc. (NYSE:MWA)

Next Wave Energy Partners


Baker Hughes

Capital Dynamics



Huntington Ingalls

Work highlights

  • Counsel for Next Wave Energy Partners’ development and project financing of its 28,000 barrels-per-day alkylate production facility near the Houston Ship Channel in Pasadena, Texas.
  • Represented Capital Dynamics, Inc. in its acquisition of an approximately 300MW portfolio of operating solar power plants located in California, Delaware and Arizona.
  • Advised Huntington Ingalls Industries on its definitive agreement to acquire Hydroid, Inc., a wholly-owned subsidiary of Kongsberg Gruppen ASA.

Paul Hastings LLP

The environment team at Paul Hastings LLP is a popular destination among financial institutions, major corporations, private equity and real estate funds involved in nationwide and cross-border transactions. In addition to its established track record in assisting Asian investors navigate US environmental liability concerns, the practice has recently handled several matters relating to Latin American project finance deals. Washington DC-based practice head Tom Mounteer is well versed in assisting with business-critical environmental issues associated with M&A, financing and capital markets deals.

Practice head(s):

Tom Mounteer


‘Tom Mounteer has been a collaborative and expertly informed thought partner on complex real estate environmental issues. His intellect is unmatched and I have been incredibly grateful for his efficiency and clarity in advising.’

‘The Paul Hastings team is great at providing their assessment on the different paths for risk mitigation in this discipline coupled with a practical approach based on transaction dynamics. I’ve always found Tom and the team a pleasure to work with and easy to follow in the explanation of complex issues and the different options on the table. Tom’s ability to take a practical, level headed approach to each situation makes him a great partner in all facets of a transaction. He can bubble up the issues in a way that is easy to follow-up and collaborative when it comes to finding a solution to issues as they come up.’

‘Paul Hastings provides exceptional environmental and business advice for real estate transactions. They use their deep experience in the field to help advise on novel issues that arise in this ever changing world, including climate change and carbon credits. They are very generous with their pro bono services! Tom Mounteer is an exceptional environmental attorney because he helps understand your needs, explain risks, and finds practical solutions.’

Key clients


BMO (Bank of Montreal)


Capitol One

Credit Suisse

General Electric


JP Morgan

Kobe Steel


Morgan Stanley

Oaktree Capital Management

RBC (Royal Bank of Canada)


Société Générale


Vance Street Capital

Wells Fargo

Work highlights

  • Acted for Bank of America as joint book-running managers in the offering of senior notes by Laredo Petroleum, Inc.
  • Assisted Daelim Industrial with the environmental aspects of its acquisition of the CariflexTM business unit of Kraton Corporation.
  • Represented United Pumping and United Stormwater in negotiating an administrative agreement with the US Environmental Protection Agency.

Sullivan & Worcester LLP

Sullivan & Worcester LLP is particularly noted for its ability to assist with environmental due diligence and regulatory issues in the context of REIT transactions. The team boasts additional strength in land use and environmental permitting matters in connection with real estate development projects. Washington DC-based Jeffrey Karp heads up the department that has recently bolstered its focus on the renewable energy project development front. Victor Baltera in Boston has extensive experience overseeing the environmental aspects of real estate and business transactions.

Practice head(s):

Jeffrey Karp

Other key lawyers:

Victor Baltera


‘Incredible personal touch. The attorneys at Sullivan are as interested in me as a person as they are in my legal challenges and opportunities. It is a big firm with an old fashioned small practice feel.’

Key clients

Cronin Holdings LP

Industrial Logistics Properties Trust (Nasdaq: ILPT)

Manulife US Reit (SGX: BTOU)

Troutman Pepper

Providing coast-to-coast environmental law coverage, Troutman Pepper has a deep bench of experts who are well equipped to assist clients with the structuring of M&A and credit transactions to minimize environmental exposure. The team has a strong profile in the energy sector, where practitioners are often retained to advise on the environmental aspects of renewable and infrastructure projects development, site acquisitions and related financing. The environment and natural resources department is jointly led by Catherine Little and Fitzgerald Veira in Atlanta, but the key contacts for transactional work are New York-based Andrew Perel and Hayden Baker. Perel is typically engaged by financial institutions in real estate deals, while Baker counsels clients in the energy, infrastructure and tech sectors.

Practice head(s):

Catherine Little; Fitzgerald Veira

Other key lawyers:

Andrew Perel; Hayden Baker

Key clients

I Squared Capital

BNRG Renewables

Square Mile Capital Management LLC

LMF Commercial


Urban Edge Properties

Willkie Farr & Gallagher LLP

Willkie Farr & Gallagher LLP has broad environmental, health and safety capabilities and is adept at assessing the risks and opportunities in a plethora of commercial settings. M&A and private equity transactions are areas of focus for department head William Thomas, who is rated for his experience in international and cross-border matters involving emerging issues such as ESG, sustainability and climate change. Thomas is based in the Washington DC office.

Practice head(s):

William Thomas

Key clients

American Railcar Industries, Inc.

FFL Partners, LLC


Hudson’s Bay Company

Compass Partners Capital, LLC

American Trailer Rental Group

Franchise Group, Inc.

Foundation Source

Tenex Capital Management

Colony Capital, Inc.

Atlas Holdings LLC

Seaport Capital