John O'Brien serves as the CEO of JERA Americas, a role in which he oversees critical aspects of energy strategy, data center operations, power generation, and trading. His expertise also encompasses regulatory affairs, policy development, Liquefied Natural Gas (LNG), mergers and acquisitions (M&A), and Engineering, Procurement, and Construction (EPC).

Prior to his current position, O'Brien held significant leadership roles across various prominent energy companies.