Matador Resources announces executive promotions
June 13, 2025
Matador Resources Co. and its midstream affiliate, San Mateo Midstream LLC, announced several leadership promotions aimed at strengthening the company’s executive team as it expands operations in the Delaware Basin.
Bryan A. Erman has been promoted to co-president, chief legal officer and head of M&A. William D. Lambert will now serve as executive vice president, chief financial officer and head of strategy. Matador founder, chairman and CEO Joseph Wm. Foran praised both leaders for their strategic contributions, noting that Erman will work alongside co-president Van Singleton, and Lambert brings immediate impact to the company’s financial and investor relations functions.
In the midstream division, Brian J. Willey, formerly Matador’s chief financial officer, has been named executive vice president – midstream at Matador and executive vice president, chief administrative officer and chief legal officer at San Mateo. Robert T. Macalik has been promoted to executive vice president – administration and finance at Matador and chief financial officer of San Mateo.
The leadership changes follow San Mateo’s recent expansion of its Marlan gas processing plant in New Mexico, which has helped grow total system capacity to 720 million cubic feet per day, placing it among the top three midstream systems by capacity in the state.
“These promotions will help strengthen San Mateo for future opportunities and growth,” said Timothy E. Parker, Matador’s lead independent director, citing the strategic importance of the company’s midstream assets.
Matador is an independent energy company focused on oil and gas development in the Delaware Basin. It also operates supporting midstream infrastructure through San Mateo, a joint venture with Five Point Infrastructure.




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