Per EngeDr. Stephen Zoepf, Ph.D., M.Sc., B.Sc., is the Chief of Policy Development for Ellis & Associates, where he helps guide the development of open-source software products for cities to manage modern transportation systems. He teaches at Stanfor University and holds a Ph.D., M.Sc. and B.Sc. from MIT, and has two decades of experience in transportation and mobility.

Nick Enge, M.S., developed and co-taught Stanford University's first modern undergraduate course on electric vehicles. He is currently a lecturer at the University of Texas at Austin, and is the co-author of The Science of Speaking.

Per Enge, was Director of the Stanford GPS Lab at Stanford University. He was a member of the National Academy of Engineers and GPS Hall of Fame, and a Fellow of the ION and IEEE and author of Global Positioning System: Signals, Measurements, and Performance.
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