This is a sources-sought notice for planning purposes only and is not a solicitation. The requirement is for Technical Assistance and Field Service Representative support for the PAC-3 Defense System and its Ground Support Equipment, including maintenance, training, and on-call troubleshooting. The performance period will commence no later than December 1, 2027. The place of performance is Redstone Arsenal, Alabama. Interested firms must submit a capability statement by 5:00 p.m. on March 17, 2026, to the specified email address.