With over a decade of experience trading, investing and managing risk in environmental markets, he is passionate about mobilizing the private sector to affect change while leveraging market-based mechanisms and nature to address the climate crisis. He joined Hartree in 2015 to set up and lead the Environmental Products business. Prior to this, he was a managing partner at Mercuria and global head of emissions trading for Citigroup in London. Ariel holds a BS in applied economics and management from Cornell University.