James Mandel is a Managing Director and Blackstone's Chief Sustainability Officer. Mr. Mandel is involved in sustainability and climate initiatives that seek to drive long-term value across our portfolio companies.

Before joining Blackstone in 2021, Mr. Mandel was Managing Director of the Carbon-Free Buildings program at Rocky Mountain Institute, where he led research, consulting, and policy work focused on emissions reduction in buildings, with a focus on the US, China, and India. Prior to Rocky Mountain Institute, he worked at McKinsey and Company with a focus on sustainability and operational efficiency in energy and industrial companies.

Mr. Mandel has a BA with a concentration in ecology and evolutionary biology from Princeton University and a PhD in Ecology from Cornell University.