Julie Van Kleeck, vice president for advanced space and launch at Aerojet Rocketdyne, discusses the company’s rocket engine portfolio, design philosophy, Mars mission role, industry competition, cost-cutting efforts, lessons learned and more with Defense & Aerospace Report Editor Vago Muradian. The interview was conducted on May 10, 2017, at Aerojet Rocketdyne’s facility at NASA’s John C. Stennis Space Center, Mississippi. The Defense & Aerospace Report’s Stennis coverage was sponsored by Aerojet Rocketdyne.