EXCELSIOR is a state-of-the-art research facility at Oklahoma State University that provides a dedicated space for advanced research and development in mechanical and aerospace engineering, including integration, testing and manufacturing. Opened in 2019, the facility features specialized rooms for electrical manufacturing, 3D printing, composite work and engine testing, as well as a secure integration room. EXCELSIOR supports a wide range of projects related to the environment, ecology, weather, climate change and national security, offering enhanced educational opportunities for students studying aerospace engineering. The lab's strategic location on Willis Street, closer to the Stillwater campus, facilitates better collaboration and coordination with university and industrial partners.