As the Founder and President of Responsible Energy Solutions LLC, Roy Hartstein is driven to help oil and gas companies find value in environmental excellence and in demonstrating that natural gas can be an important part of our energy future. He pioneered the execution of the first U.S. “certified gas” transaction, led companies to achieve “Freshwater Neutral”, established methane management initiatives for production operations and chaired the first Group of Experts on Methane Emissions for the International Gas Union from 2015 to 2018. Recently Hartstein served as an industry methane emissions expert for the US Trade Development Agency's trade missions on Advanced Technologies for Methane Abatement which included companies from Egypt, Algeria, Libya, Ecuador, Argentina and Mexico. He also serves as an Advisory Board member of the Center for ESG and Sustainability.

Hartstein has spoken frequently on resource development including presentations on certified gas, water management and methane emissions management. Recent presentations include the SPE Forum - The Future of Energy; SPE Capital Section - Certified Gas in the Marketplace; North American Energy Capital Conference - Certified Gas Workshop; CH4 Connections Conference; 4C HSE – Benefits of Responsibly Sourced Gas; Louisiana Mid-Continent Oil and Gas Association – Responsibly Sourced Gas and American Council for Capital Formation – The Role of Responsibly Sourced Gas.