Troutman Pepper Locke Adds Mac Marshall As Partner In Houston Energy Transactional Practice

By Amit Chowdhry ● Jul 20, 2026

Troutman Pepper Locke has added Mac Marshall as a partner in its Energy Transactional Practice Group. Based in Houston, Marshall brings approximately two decades of experience advising on upstream, midstream and international energy transactions collectively valued at more than $17 billion.

Marshall joins the firm from Norton Rose Fulbright. His addition strengthens Troutman Pepper Locke’s capabilities in Houston, one of the world’s most active markets for oil, gas, infrastructure and energy financing transactions.

Marshall advises clients on acquisitions and divestitures involving producing and non-producing oil and gas properties. His experience also covers the purchase, sale, construction and financing of pipelines, gathering systems and storage facilities.

Upstream transactions generally involve the exploration and production of oil and natural gas. Midstream matters focus on the infrastructure used to gather, process, transport and store those resources.

Marshall also negotiates commercial agreements supporting energy operations. These include gathering, processing and treating contracts, production handling agreements, master service agreements, hedging arrangements and seismic data licenses.

His practice includes agreements based on standards developed by the North American Energy Standards Board. These contracts are frequently used to structure transactions across the natural gas and broader energy markets.

Marshall is board certified in Oil, Gas and Mineral Law by the Texas Board of Legal Specialization. He also advises lenders and borrowers on conventional financing, mezzanine financing, reserve-based lending and revolving and term credit facilities.

Reserve-based loans are commonly used by oil and gas companies and are secured by the value of their energy reserves. The borrowing capacity under these facilities can change as commodity prices, production levels and reserve estimates evolve.

Marshall’s addition follows the recent arrival of Allison Perlman. Troutman Pepper Locke said the hires reflect a deliberate effort to expand its capabilities across complex energy transactions.

The firm advises electric utilities, independent power producers, financial institutions and upstream and midstream companies. Its clients also include private equity firms, service providers and other corporations involved in traditional and emerging energy markets.

Troutman Pepper Locke has more than 1,600 attorneys across over 30 offices. The firm serves clients across energy, financial services, healthcare, life sciences, insurance, private equity and real estate.

KEY QUOTES:

“Mac has built a strong reputation in commercial midstream contracts, and his command of upstream acquisitions and divestitures is exactly the kind of depth we have been looking to add to our practice. His arrival, alongside the recent addition of Allison Perlman, reflects deliberate momentum we are building across the full range of complex energy transactions, and that growth translates directly into stronger, more comprehensive capabilities for our clients.”

Christine Byrnes, Leader of Troutman Pepper Locke’s Energy Transactional Practice Group

“Houston is a key global market in the energy industry, and welcoming an attorney of Mac’s caliber strengthens our ability to serve clients at the heart of the market. His addition gives our clients a real edge when navigating the most complex upstream and midstream matters, and we are thrilled to welcome him to the firm.”

Laura Edrington, Managing Partner of Troutman Pepper Locke’s Houston Office

“Troutman Pepper Locke has built a truly full-service energy practice, and that depth matters to clients navigating complex transactions. I was drawn to the firm’s ability to handle every dimension of a deal, from upstream and midstream acquisitions to project finance. I look forward to putting that platform to work for clients in Houston and across the country.”

Mac Marshall, Partner at Troutman Pepper Locke

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