Marius Griskonis

Partner, New York


“He is an excellent attorney, a great negotiator and strong communicator. He is aware of current terms in the market and he quickly dissects business problems to get to the core issues,” according to a client.
Chambers USA 2018


Marius advises domestic and international clients on major corporate and financing transactions. His practice has a particular focus on the development, financing, acquisition and sale of renewable energy infrastructure. He advises on complex single project and large portfolio transactions, enabling the successful development, funding and completion of large-scale projects and deals.

He has represented developers, sponsors, investors, underwriters, commercial banks, investment banks, export credit agencies and other multilateral agencies in major projects across an array of sectors, including renewable energy (solar, onshore and offshore wind), alternative and renewable fuel, conventional power generation, power transmission, oil and gas, petrochemical, infrastructure and telecommunications industries.

Marius' varied sector knowledge is matched by the international breadth of his practice background and experience. He has supported projects located across North and South America, Europe and Asia.

Marius' successful track record and extensive knowledge of his field has made him a valued asset for clients seeking clarity in complex transactions, where intricate regulatory issues and tax and accounting rules require careful consideration.

He is a partner in the Energy, Infrastructure, Project and Asset Finance Group, a global team dedicated to providing strategic and practical advice across multiple jurisdictions on the development, financing and restructuring of major projects.

Bars and Courts
New York State Bar
University of Iowa College of Law

Edmund S. Muskie Fellowship (under authority of Fulbright Hays Act)

University of Vilnius
Diploma of Qualified Lawyer, Faculty of Law


Representation of Morgan Stanley Energy Partners (MSEP) in connection with its investment in SolMicroGrid, a developer and operator of solar-enabled microgrid systems for commercial and industrial customers.

Representation of a consortium of Korean investors in connection with an acquisition of a 49.9% cash equity interest in a portfolio of four wind projects in the U.S. totalling 852 MWs, located in Texas, Illinois and Nebraska. The equity interest was acquired from Brookfield Renewable and Invenergy LLC in a transaction with an implied aggregate enterprise value for the portfolio of approximately $1.5 billion. This landmark Korean transaction is one of the first major investments made by Korean infrastructure investors since COVID-19 and the largest renewable energy acquisition completed globally by Korean investors to date.

Representation of the developer and cash equity investor in connection with the financing of, and tax equity investment in, a large-scale offshore wind project in the US.

Representation of Akuo Energy as equity investor in connection with the acquisition of an equity stake in a 336 MW Escalade wind project in Texas developed by Taaleri Energia.

Representation of Abu Dhabi Future Energy Company (Masdar), a subsidiary of Mubadala, on its acquisition of a 50% cash equity interest from EDF Renewables, Inc., in a 1.6 GW portfolio of six solar and wind farm projects located in California, Nebraska and Texas, making it one of the biggest acquisitions of renewable assets in 2020 in North America upon its consummation.

Representation of Mizuho Bank, Ltd. and The Korea Development Bank as lead arrangers and lenders in connection with a back-leverage financing for the construction and operation of a 60 MW AC solar photovoltaic power plant with a 32 MW / 32 MWh battery storage system, located in Guam, the U.S. territory.

Representation of the lenders in connection with the non-recourse project financing of the $1 billion Gulf Coast Ammonia plant, which will produce 1.3 million tons of ammonia per year from nitrogen gas and hydrogen feedstock.

Representation of Abu Dhabi Future Energy Company (Masdar) in connection with its acquisition of John Laing Group's cash equity interest in the Rocksprings wind farm in Texas and the Sterling wind farm in New Mexico developed by Akuo Energy.

Representation of Clearway Energy Inc. as sponsor and its subsidiary as borrower in connection with the refinancing of the South Trent wind farm, a 100 MW wind farm in Texas.

Representation of Solairedirect (a subsidiary of Engie) as sponsor and cash equity investor in connection with the SolaireHolman I project involving the back-leverage financing of, and tax equity investment in, a 50 MW solar project in Texas.

Representation of Akuo Energy as sponsor and its subsidiary as borrower in connection with the financing of the construction and operation of a 50 MW Pecasa wind farm in the Dominican Republic.

Representation of Nord L/B and other lenders in connection with the refinancing of the 150 MW Lost Creek wind farm in Missouri.

Representation of Dynegy Inc. in its US$2.8 billion acquisition of ownership interests in certain Midwest generation assets from Duke Energy Corp. The sale, which included 11 Duke natural gas, coal and oil power plants in Ohio, Pennsylvania and Illinois, as well as its retail sales business, was part of a US$6.25 billion acquisition of power plants from Duke Energy Corp and private equity firm Energy Capital Partners.

Representation of Calpine Corporation in its US$1.57 billion sale of six power plants located in Oklahoma, Louisiana, Alabama, Florida and South Carolina, comprising 3,498 MW of combined-cycle generation capacity, to NatGen Southeast Power LLC, a subsidiary of LS Power Equity Partners III.

Representation of Mizuho Bank, Ltd. as arranger and lender in the project financing of the Guam Solar project, a 25.65 MWac photovoltaic solar power project in Guam, the U.S. territory.

Representation of SMBC, MUFG and Mizuho Bank, as mandated lead arrangers and lenders, in the refinancing of a 440 MW rated gas-fired combined cycle power plant, located inside The Dow Chemical Company's Oyster Creek chemical complex in Freeport, Texas.

Representation of Great Basin Transmission South, LLC, a subsidiary of LS Power, in the One Nevada Transmission Line project, which involved the development of a new 235-mile, 500-kilovolt transmission line extending from northern Nevada to an area outside of Las Vegas in southern Nevada.

Speaking Engagements

"Forecasting & Managing the Costs of Offshore Wind in the US", February 4, 2020: Infocast Offshore Wind Power F&I Summit

"Understanding and Negotiating Financial Covenants", July 23, 2014: Practical Law webinar


"Q&A: M&A in the renewable energy sector", Financier Worldwide, April 2020

"Fair winds for offshore wind in the US", Project Finance International, July 2018

"Financial Covenants: Project Finance Transactions" – together with Practical Law Finance, February 2015

Awards and Recognition

Band 1: Projects: Power & Renewables: Transactional – Nationwide, Chambers USA 2020

Band 3: Projects: Renewables & Alternative Energy – Nationwide, Chambers USA 2020

Band 4: Projects – Nationwide, Chambers USA 2020

Band 4: Projects (USA), Chambers Global 2020

Recognized Practitioner: Project Finance (USA), The Legal 500 2020 

Recognized Practitioner: Energy: Renewable/Alternative Power (USA), The Legal 500 2020
Rising Star, Law360, 2015 – Project Finance