Mac Marshall focuses on a wide range of energy-related projects located onshore, offshore, upstream, midstream and internationally. His extensive portfolio of work with energy industry clients includes acquisitions and divestitures of producing and non-producing oil and gas properties; acquisitions, divestitures, construction and financing of pipelines, gathering systems and storage facilities for natural gas, crude oil, condensate and natural gas liquids; oil and gas joint ventures and exploration and development programs; exploration and development project agreements including joint operating agreements, COPAS accounting procedures; exploration and development agreements and joint operating agreements; natural gas purchase, sales and marketing agreements and NAESB agreements; natural gas gathering, processing and treating agreements, oil and gas transportation agreements and related midstream agreements; gas storage agreements; bankruptcy asset sales and restructurings; production handling agreements; master service agreements and drilling contracts; hedging agreements; and seismic data licenses and acquisition agreements.

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.

Mac is Board Certified by the Texas Board of Legal Specialization in Oil, Gas and Mineral Law.