Gutierrez joined NRG in 2004, shortly before the company moved to its current headquarters in Princeton, NJ. In his role as Chief Operating Officer, he is responsible, as he describes it, for "making sure the trains run on time." He holds top responsibility for ensuring that NRG's entire generating and thermal operations fleets operate at top levels of safety, performance and environmental sustainability. He also leads NRG's engineering and construction activities related to new generation and repowering projects. By overseeing commodities trading through increasingly volatile energy commodity markets, he helps maximize NRG's financial performance. At NRG, he has also held the positions of Executive Vice President, Commercial Operations and Senior Vice President, Commodities Trading.