Raised in Houston, Texas, Jeffery received a combined PhD in Engineering and Public Policy and in Civil and Environmental Engineering from Carnegie Mellon University. He received dual bachelor’s degrees in Environmental Engineering and in Applied Math and Statistics from Johns Hopkins University. He was a 2018 CCST Science Fellow placed in the Senate Transportation and Housing Committee. After the fellowship, Jeff was recruited to help with training of the 2019 CCST Science Fellows and accepted a position as a Transportation Policy Postdoctoral Researcher in the 3 Revolutions Program at University of California Davis. He joined the CCST staff in 2019 as Interim Program Manager for the Science Fellows.