This is a notice of intent to issue a sole-source, follow-on contract to Cubic Defense Applications for the sustainment of the MOKITS air combat training system, starting on or about 1 August 2026. The contractor will provide configuration management, sustainment engineering, logistics, and maintain approximately 143 instrumentation pods and four ground subsystems located at Misawa AB and Kadena AB in Japan, and Osan AB in the Republic of Korea. The period of performance includes a one-year base period and four one-year options, with a potential six-month extension, for a total not to exceed five years and six months. The agency justifies other than full and open competition because the required proprietary pods and highly specialized services are deemed available only from the original source, as market research found no other sources could perform the work without substantial cost duplication or unacceptable delays. Interested sources must submit detailed capability information to challenge this determination, though no budget information is provided in this notice.