Greg Streiff, CEO & Founder of ESGX Greg Streiff is the Founder and CEO of The ESG Transition Company, also known as ESGx. He has over 15 years of experience in the energy and power sector, as well as in infrastructure. Throughout his career, Greg has worked as a principal investor and in corporate development. Before founding ESGx, Greg was an Associate at Denham Capital Management LP, a global energy and resources private equity firm. Prior to that, he served as a Senior Analyst in the Global Energy & Power Group at Merrill Lynch, where he gained extensive experience in energy and power sector investments. Greg holds a degree in Plastics Engineering Technology from Penn State Behrend.