Rex Alexander has over four decades of military aviation, general aviation, and commercial aviation experience, and is a globally recognized subject matter expert on helicopter, vertical lift and eVTOL infrastructure. He is the founder and president of the aeronautical consulting firm Five-Alpha (5α) and has served as Infrastructure Advisor to the Vertical Flight Society since January 2019. Rex is co-chair of the US Helicopter Safety Team (USHST) Infrastructure Working Group, Chair of the National Fire Protection Association (NFPA) 418, Standard for Heliports, a member of ASTM International F38 WK59317 New Specification for Vertiport Design, a member of the Vertical Aviation Safety Team (VAST) Technology Working Group, a member of the Illuminating Engineering Society (IES) Technical Committee, a member of the Helicopter Association International (HAI) Vertical Flight Infrastructure Sub-Working Group, and serves as a platform instructor to the U.S. D.O.T. Transportation Safety Institute. He is an alumnus of Parks College of Aviation and a former US Army Warrant Officer and ‘Aeroscout’ Helicopter Pilot, Instructor Pilot and Standardization Instructor, having served both on active duty and in the Indiana Army National Guard.