Back when Jackie Weidman was a special assistant at the Center for American Progress, a progressive think tank, she recognized a gap in clean-energy leadership: Where were all the young people? She knew that tackling the challenges posed by climate change would require a whole new skillset.

For Weidman, that meant stepping up to recruit, train, and network the talent to help lead this new workforce. “It’s really important that our generation is stepping up and leading companies and other organizations,” she says. This thinking laid the groundwork for what would become the Clean Energy Leadership Institute.

Since 2013, Weidman’s D.C.-based group has trained more than 150…