Mac Marshall

Mac has an extensive energy practice spanning the full lifecycle of oil and gas assets across onshore, offshore, upstream, midstream, and international projects. He represents energy industry clients in acquisitions and divestitures of producing and non-producing oil and gas properties; the acquisition, divestiture, construction, and financing of pipelines, gathering systems, and storage facilities for natural gas, crude oil, condensate, and natural gas liquids; and oil and gas joint ventures and exploration and development programs.

Mac drafts, negotiates, and reviews exploration and development agreements, including joint operating agreements, COPAS accounting procedures, production handling agreements, master service agreements, drilling contracts, hedging agreements, and seismic data licenses. His midstream experience includes natural gas purchase, sales, and marketing agreements, NAESB agreements, gathering, processing and treating agreements, oil and gas transportation agreements, and gas storage agreements. Mac also advises clients in bankruptcy asset sales and restructurings within the energy sector.

Mac also represents lenders and borrowers in a wide variety of conventional and mezzanine energy financings and related secured transactions, including reserve-based lending and revolving and term credit facilities. He notably has represented commercial banks in producer financings exceeding $500 million secured by onshore and offshore oil and gas properties.

• Represented a Japanese conglomerate in a $1.4 billion venture with a major U.S. oil and gas company to jointly explore for and develop natural gas in the Marcellus Shale.
• Represented a large U.S. exploration company in an approximate $3.2 billion Marcellus Shale joint venture (including acquiring a related gathering company and structuring gathering agreements).
• Represented a major Eagle Ford Shale exploration company in negotiating gathering, processing, transportation, treating, and related agreements for its Eagle Ford shale joint venture acreage originally acquired for $1.325 billion.
• Represented a major Marcellus Shale exploration company in restructuring gas gathering and processing agreements for acreage originally acquired in an $11 billion merger.
• Represented a Texas-based exploration and production companies in disposing of their interests in Colombian concession agreements.
• Represented a private equity company in a $400 million venture with a major U.S. oil and gas company to jointly explore for and develop natural gas in the Eagle Ford Shale Formation.
• Represented a refining company in structuring a $500 million crude feedstock supply agreement for a refinery in Hawaii.
• Represented commercial banks in producer financings in excess of $500 million secured by onshore and offshore producing oil and gas properties.
• Represented an agent bank in gas storage project financing.
• Represented numerous oil and gas exploration companies in establishing and funding joint ventures and partnerships for oil and gas exploration and development projects.
• Represented numerous oil and gas producing companies in acquiring and divesting onshore and offshore producing oil and gas properties.
• Represented the agent bank in a $900 million syndicated credit facility for a pipeline company.
• Represented the agent bank in a $375 million syndicated credit facility for a refining company.

• Legal 500 United States, Recommended Lawyer in Energy Transactions: Oil and Gas (2024-2025)
• Lawdragon 500, Leading Energy Lawyers (2023, 2025)