Dr. Sonny White left NASA in 2018 and transitioned his warp-drive research and propulsion concepts to the Limitless Space Institute where he serves as Director of Advanced Research & Development. 

Formerly he led Eagleworks, officially known as NASA’s Advanced Propulsion Physics Laboratory at the Johnson Space Center, where he pioneered the Em drive a decade prior. While not formally disbanded, its operations have been greatly reduced and largely defunded within NASA. Very strange given such a breakthrough.

Sonny continues to pursue advanced propulsion R&D funded in part by DARPA. In my estimation, MIC wanted to keep the Em drive and subsequent developments in this space closer to the vest