bhpBHP Billiton, $66B Australia mining/energy conglomerate, has registered a D.C. lobbying outpost with the growth of its U.S. business.

Via is 2011 $12B acquisition of Petrohawk Energy, BHP is a leading developer in booming Eagle Ford Shale formation in south Texas. Petrohawk is credited with discovering the shale formation in 2008.

BHP has registered as lobbyists CEO Andrew Mackenzie and newly minted corporate affairs president Tony Cudmore, who joined in January from Exxon Mobil.

They are joined by Jason Buckner, aide to former Oklahoma Congressman Dan Boren, and Frank Fannon, staffer for New Mexico’s ex-Senator Pete Domenici.

BHP also has oil/gas holdings in the Gulf of Mexico, copper resources in Arizona and coal properties in New Mexico.

Tony Cudmore of ExxonMobil became president of corporate affairs at BHP Billiton on March 3, succeeding acting CA chief Karen Wood.