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740

Practice:

  • Energy & Infrastructure Sector
  • Energy
  • 石油与天然气
  • Renewable Energy
  • Structured Finance
  • Mergers & Acquisitions
  • Restructuring
  • Real Estate

Jonathan Ayre 合伙人

休斯敦

Jonathan represents companies driving the energy transition, including representing project developers in connection with engineering, procurement and construction agreements, solar module purchase agreements, transformer purchase agreements, and operation and maintenance agreements. He co-leads Orrick's nuclear power practice and has represented the purchaser in the first high-assay low-enriched uranium purchase agreement, as well as in numerous joint venture, engineering, procurement, and construction, and commercial agreements in the nuclear power industry. Chambers Global has reported, "He knows the industry very well and takes a commercial approach to help resolve differences with the counterparty. He has a good bedside manner and cooperates well with others,” and ”he's very resourceful and he approaches the energy and corporate sector with a true business sense." Jonathan was recognized in 2020 by Law 360 as an Energy Rising Star.

Jonathan is a recognized leader in cutting-edge transactions in oil and gas securitizations, representing the investors in the first oil and gas securitization, in the first operated property transaction, in the first transaction involving properties owned by the Bureau of Land Management, and in the first transaction using a master trust structure. He has worked on over $20 billion of oil and gas securitizations.

Jonathan is an active supporter of the Houston Symphony, serving as Chairman of the Houston Symphony's Finance Committee, as a Governing Director on the Houston Symphony Society's Board of Trustees, and as chair of the 2021 Houston Symphony's Wine Dinner and Collector's Auction. He serves as a member of the Steering Committee of the Houston Men of Distinction Annual Awards Luncheon, an organization that recognizes Houston men who have distinguished themselves through excellence in community achievement, thereby providing support in superior biomedical research, education, and patient care in the Texas Medical Center.

740

Practice:

  • Finance Sector
  • Structured Finance
  • Finance

Janet Barbiere 合伙人

New York

She represents banks, investment banks and other financial institutions in their roles as issuers, underwriters, placement agents, originators, loan sellers and investors in commercial mortgage loan and mezzanine loan securitizations, real estate syndications, origination and servicing programs, the acquisition and sale of interests in mortgage loans, mortgage securities, subordinated debt and mezzanine debt, as well as transactions in the secondary mortgage market.

She has advised banks and other financial institutions in analyzing and structuring a broad array of traditional and unique CMBS transactions, in the restructuring and sale of performing and non-performing commercial mortgage loans, and in connection with CMBS re-securitizations and CRE CLO securitizations. She serves on various SFIG and CREFC Committees.

Prior to joining Orrick, Janet was a partner in the New York offices of Kaye Scholer LLP, Thacher Proffitt & Wood LLP and Sidley Austin LLP.

460393

Practice:

  • Real Estate
  • Data Centers
  • Finance

Peter C. Bergan, Jr. 合伙人

Chicago

With over a decade of experience, Peter has guided clients through joint ventures, investments, financings and acquisitions/dispositions across commercial, digital infrastructure, industrial, mining, retail, hospitality, and multifamily and single-family assets nationwide.

He brings a unique focus to data center and digital infrastructure assets with a broad perspective, advising on construction, M&A, leasing, customer and other contracts. From hyperscale facilities and colocation centers to enterprise and cloud-based solutions, he draws on his experience with industry stakeholders to deliver clear, confident guidance to clients navigating this increasingly dense space.

Beyond the office, Peter is committed to community service, serving as a board member for Rugby Ohio, an organization dedicated to supporting the growth and development of children and teenagers through the game of rugby. He is also an active member of the Urban Land Institute and the International Council of Shopping Centers.

Practice:

  • Energy & Infrastructure Sector
  • Energy
  • Infrastructure
  • Public Finance

Geoffroy Berthon 合伙人

巴黎

Geoffroy advises on public contracts, particularly in the context of concessions and PPPs. He has been involved in projects relating to the financing, construction and operation of the Stade Vélodrome in Marseille; the Sud Europe Atlantique high-speed line; the Athletes' Village for the Paris 2024 Olympic Games; the Grand Paris Express and the offshore extension of the Principality of Monaco. He has also worked on several French highway (A412, A69, RCEA, A88, A41, A150), port (Calais, Cannes) and airport projects (Nice, Lyon, Beauvais).

In the renewables field, he acts alongside the French government (Ministry of Energy Transition) in calls for tenders for the construction of offshore wind farms, including floating wind turbines, and advises operators in the realization of biomass and geothermal projects, as well as investors in the context of "M&A" operations concerning wind and solar assets and methanization. He also has experience in hydroelectricity matters. He advises both sponsors and lenders and works regularly with public entities and governments. He also advises on the drafting and negotiation of corporate PPAs, acting for both energy producers and buyers.

Geoffroy Berthon is recognized by clients as "talented, dynamic and brilliant lawyer. He is a hard worker. His calm manner and attentiveness reassure as a client" (Legal 500) and as a Leading Partner by Legal 500 (EMEA 2025) in public law and energy.

Geoffroy holds a doctorate in public law, was a lecturer in public contract law at Sciences Po, and frequently published in both English and French.

455206

Practice:

  • Data Centers
  • Renewable Energy
  • 电力
  • 石油与天然气
  • Energy
  • Energy & Infrastructure

Ari Bessendorf 合伙人

Singapore

Ari’s practice cuts across sectors, including conventional power, renewable energy (solar, wind, geothermal, hydroelectric), infrastructure, oil & gas and mining throughout the United States and Asia. His combination of project development and finance experience allows him to advise clients on bankability considerations for development matters.

Clients commend him for being “meticulous on the finer details”, and “a firm but calming and amiable presence at the negotiating table.” They add that “he gained our trust” and has “a cost-effective approach and a drive to successfully close deals.”

Mariangela Di Giandomenico 合伙人

罗马

As expert in Italian Administrative and Public Law, she has focused her career on advising private and public Italian and foreign companies, corporations and public administrations on public law regulatory and litigation matters, providing particular assistance in M&A transactions.

Mariangela has extensive experience working in all the areas of administrative law, especially in public contracts, urban planning and real estate, electronic communications, energy, aerospace and defense, life sciences, transportation and infrastructure, regulated services and also in litigation before Administrative Judge, Constitutional and European Court.

In 2025, she was appointed by the European Commission as member of the Stakeholder Expert Group on Public Procurement (SEGPP),” which supports the Commission in the reform of EU public procurement directives.

With an extensive background litigating before administrative law judges, Mariangela is a recognized leader in shaping public law policy in Italy. She has collaborated with the Italian Chamber of Deputies, the president of the Commission for Administrative Reform, overseeing the drafting of bills, parliamentary reports and regulatory proposals.

During her career, she has worked in both international and Italian law firms, as well as in boutiques specialized in administrative law.

She is a member of the Scientific Committee of the Italiadecide Association and oversee the Observatory on Public Contracts of the Association. She teaches at Master’s degree courses in administrative law as well as courses in public institutions

She is also an author of numerous publications in the field, rapporteur at conferences and public seminars and a researcher for private and public associations.

She is authorized to practice in the higher courts.

In 2021 Mariangela has been included by Top Legal among the best lawyers specialized in public procurement and concessions. In 2022 she was named infrastructure and PPP lawyer of the year by Legalcommunity.