GreenFire Energy GreenFire Energy Inc. is a United States-based company deploying a closed-loop technology to improve the harvesting of geothermal energy. In March 2022, IDTechEx Technology Analyst Dr Hydra Rodrigues spoke with John Muir, Senior Vice President of Business Development at GreenFire Energy, and Hollis Chin, VP of Marketing at GreenFire Energy. GreenFire Energy