The Vertical Flight Society is hosting its first workshop on the defining challenges of electric vertical takeoff and landing (eVTOL) aircraft, planned for Sept. 10-12, 2019, at the US Navy Memorial in Washington, D.C. The three-day workshop will be dedicated to beginning the process of identifying and developing the foundational standards needed to support this growing eVTOL industry. Importantly, this workshop will review what key organizations are working on and look for gaps and overlaps in developments to realize a successful realization of urban air mobility (UAM).