America's Natural Gas Alliance has selected Jim Hackett, chairman and chief executive officer of Anadarko Petroleum Corp., as the organization’s new chairman.

National Fuel Gas Co., Williamsville, NY, has elected David F. Smith as chairman, succeeding Philip Co. Ackerman.

G. Thomas Gamble has become chairman and Maston N. Cunningham chief executive officer of Tri-Valley Corp., Bakersfield, Calif., with the retirement of F. Lynn Blystone after 29 years of service.

Dallas-based refiner and marketer Alon USA Energy Inc. has appointed Paul Eisman as president.

Chris Brown has joined Aurelian Oil & Gas PLC, London, as exploration director.

Anadarko Petroleum Corp. has promoted Al Walker to president and chief operating officer.

Enterra Energy Trust made several management changes in preparation for its previously announced plan to convert to an exploration and production corporation to be named Equal Energy Ltd. (OGJ Online, Jan. 25, 2010).

HighMount Exploration & Production LLC, Houston, has named Jason A. Garner as chief operating officer, effective Mar. 1.

Tokyo-based refiner and marketer TonenGeneral Sekiyu KK reported that Philippe Ducom, currently its director, will succeed Kazuo Suzuki as president on Mar. 26.

ConocoPhillips announced two senior leadership changes.

Newfield Exploration Co., Houston, has named Lee K. Boothby to the additional role of chairman, effective upon his reelection at the company's annual stockholders' meeting on May 7.

Tethys Petroleum Ltd. has appointed Graham Wall as chief operating officer of the Tethys Petroleum Group.

Malaysia’s Prime Minister Najib Razak said Shamsul Azhar Abbas was appointed president and chief executive of the state-owned Petroliam Nasional Bhd (Petronas), replacing Hassan Marican.

The board of CBM Asia Development Corp., building on development of their Indonesia coalbed methane interests, has appointed Scott H. Stevens as a director.

Tethys Petroleum Ltd., Guernsey, UK, has named Graham Wall as chief operating officer.