CalEnergy Resources Limited is a subsidiary of Berkshire Hathaway Energy Company, which is headquartered in Des Moines, Iowa, U.S.

The group of operating companies headed by CalEnergy Resources Limited ("CalEnergy") currently participates in upstream oil and gas projects in Australia, Poland and the U.K. 

CalEnergy currently has three offices located in:

  • London, U.K (including both the U.K and Poland Business Unit and central reporting administration)
  • Perth, Australia (Managing Director's office, Australian Business Unit and subsurface team)
  • Warsaw, Poland (representative office) 

CalEnergy or its predecessor companies have been active in oil and gas since the 1970s, and the group has participated in exploration through appraisal, development, production and pipeline operations. 

CalEnergy currently is an active operator in both Australia and Poland.