MobilizeGreen is a national-scale initiative that helps communities advance sustainability priorities while jumpstarting green careers for students. We recruit, train, and place diverse students in sustainability internships with local governments, federal agencies, and corporations. Our innovative approach removes barriers, creates opportunities, and connects students to career pathways, leveraging public-private resources. MobilizeGreen measures impact by students trained, jobs created, greenhouse gas emissions reduced, energy saved, money saved, and communities reached. Our cost-effective approach is scalable and replicable.