Trey is Chief Executive Officer of GSR Services USA, a subsidiary of GSR’s global operation. Trey leads GSR's efforts in establishing a presence in US regulated markets. Prior to joining GSR, Mr. Griggs led efforts to locate and evaluate acquisition opportunities at Kindle Energy, a Blackstone portfolio company. Mr. Griggs also worked at independent power producer Calpine in roles including President, Chief Commercial Officer and Executive Vice President. Earlier in his career, Mr. Griggs worked at Goldman Sachs’ J. Aron division for 14 years alongside GSR founders Cristian Gil and Richard Rosenblum. Trey led Goldman’s North American Energy Risk Management activities and went on to establish and lead the Houston based Commodities Sales & Trading Office from 2011 to 2015