Hermeus’ four co-founders, AJ Piplica, Glenn Case, Mike Smayda and Skyler Shuford, previously worked together on hypersonic travel at Generation Orbit where they led the development of the Air Force's X-60A hypersonic rocket plane. CEO AJ Piplica last week told CNN, "We have a ton of flying to do in that time. We'll have at least two smaller iterations of aircraft that we'll build, test, and learn from in that time. The main challenge is integrating the core technologies together and testing them. It's really difficult to recreate the Mach 5 environment on the ground, which calls for a rethinking of how we develop vehicles that operate in this environment. That means you have to fly. We have to build a lot of hardware and fly it early so we can learn and iterate quickly."