Mark G. Papa has been named chairman of Houston-based Oil States International Inc. following the resignation of Stephen A. Wells. Papa, who has served as a director since 2001, was chairman and CEO of EOG Resources Inc. from August 1999 until December 2013, when he retired (see Daily GPI, Dec. 18, 2014). The one-time Enron Corp. executive in 1999 took the Houston subsidiary, formerly known as Enron Oil & Gas, and built it into a natural gas powerhouse over his 32-year tenure. He also is a partner with Riverstone Holdings LLC. Papa has “given us very valued insights and commentary” since he came aboard as a director, CEO Cindy B. Taylor said. “I believe he is one of the greatest industry icons around.” Papa has a petroleum engineering degree from the University of Pittsburgh and a masters degree from the University of Houston. Wells is to continue to serve as a director and as a member of the nominating and corporate governance committee, subject to reelection at the May annual shareholders’ meeting.

Don Wallette Jr. has been named CFO of ConocoPhillips effective April 1 following the retirement of Jeff Sheets, who has been with the company for more than 35 years. Wallette previously was executive vice president (EVP) for business development and corporate planning. He joined the Houston producer in 1981 as an engineer after graduating from the University of Southern California. Sheets, who became CFO in 2010, plans to remain through May to provide support during the transition. Al Hirshberg also has been promoted to EVP of production, drilling and projects; he had been EVP of technology and projects. Matt Foxx was promoted to EVP of strategy, exploration and technology following a stint as EVP of exploration and production.