Defense Innovation Unit (DIU) selected Vertex Solutions to develop the new Multi-Place Mixed Reality (MPMR) Flight Simulator. The initial contract requirement is to deliver a TH-1H rotary-wing simulator for 19^th Air Force’s Helicopter Training Next program within Air Education & Training Command (AETC). The unique modularity of Vertex Solutions’ design, however, allows DIU and Vertex Solutions to develop a capability that can be rapidly extended to multiple fixed- or rotary-wing aircraft configurations beyond the TH-1H. The MPMR flight simulator will replace the currently fielded Weapon Systems Trainers (WSTs) and save several times their initial fielding, modification, and sustainment costs, all while providing greater access to pilot training for students. Beyond meeting a mission-critical military training need, the MPMR flight simulator will provide a pathway to FAA certification for similar XR fixed- and rotary-wing training devices.