Members of the Raytheon Technologies team have been long-time core participants in the seL4 ecosystem, predating the company’s formation in 2020, which brought together Raytheon Company and United Technologies’ aerospace businesses, Collins Aerospace and Pratt & Whitney. Collins Aerospace was a prime contractor in the DARPA HACMS program, which demonstrated the seL4-based incremental cyber retrofit of autonomous military vehicles. This was a major milestone in the growth of seL4, demonstrating that it protects against cyber attacks on real systems in operation. The same Raytheon Technologies team now leads the follow-on DARPA CASE program, aiming at designed-in cyber-resiliency, including the seL4-based framework for verified initialisation and configuration of systems architectures. Welcome Raytheon! Gernot for the seL4 Foundation