James Mandel is a Managing Director in the Portfolio Operations Group at Blackstone. He is focused on sustainability and emissions reduction within Blackstone’s portfolio. Prior to that, he was a Managing Director at Rocky Mountain Institute where he led the Carbon-Free Buildings Program. James has a Ph.D. in Ecology from Cornell University.

Concordia Horizon Summit: United States Report Now Live
The 2026 Concordia Horizon Summit: United States brought together leaders from business, government, and civil society in Dallas-Fort Worth to examine the forces reshaping the global economy and the opportunities emerging from a

