Improved Homeland Defense Interceptors

The Improved Homeland Defense Interceptors program, managed by the Missile Defense Agency (MDA), is a critical element of the Department of Defense's Research, Development, Test & Evaluation (RDT&E) budget. The primary goal of this program is to develop, integrate, and test the Next Generation Interceptor (NGI) All Up Round (AUR), which features an advanced boost vehicle and multiple kill vehicle payload. This system is designed to counter a broad spectrum of missile threats, including ballistic, hypersonic, and cruise missiles, and to ensure survivability in both natural and hostile environments. The NGI will be fully integrated into the Ground-Based Midcourse Defense (GMD) Weapon System, directly supporting the operational needs of United States Northern Command (USNORTHCOM) for homeland defense.

NGI development objectives include completing the integrated AUR design, conducting sub-assembly qualifications, verifying AUR performance through high-fidelity models and simulations, and executing propulsion and sensor performance testing. The program also aims to complete qualification testing for both the boost vehicle and payload, deliver updated software releases, and initiate integrated AUR qualification testing. These activities are essential for achieving key program milestones, such as the Critical Design Review (CDR), and for preparing the system for flight testing and eventual production.

The NGI development process is structured to reduce technical risk and accelerate the schedule for fielding advanced missile defense capabilities. Following a competitive acquisition strategy, MDA awarded contracts to two prime contractors in 2021, maintaining competition through preliminary design reviews and technical knowledge points. In FY 2024, MDA selected a single prime contractor for continued development, integration, and testing through CDR and qualification phases. The program includes the procurement of materials for NGI AUR test articles, development of Peculiar Support Equipment for emplacement and maintenance, and delivery of hardware and software for integration with the GMD Weapon System. The acquisition strategy also incorporates independent technical direction and objective analysis through the GMD Technical Direction Agent.

Program Wide Support funding supports non-headquarters management costs for MDA functions across the entire Missile Defense System, including government civilian and contract support services. Program Wide Support ensures integrity and oversight of the missile defense enterprise, supports global deployments, and provides facility capabilities for MDA executing agent locations worldwide. Additional activities funded under this line include physical and technical security, audit readiness, STEM programs, legal services, travel, training, and compliance with statutory environmental requirements. The allocation of Program Wide Support fluctuates annually based on the total agency budget and is distributed on a pro-rata basis across multiple program elements.

The acquisition strategy for both NGI development and Program Wide Support emphasizes incremental capability improvements, risk reduction, and flexibility in responding to evolving threats. For NGI, the strategy includes competitive source selection, milestone-based reviews, and contract options for extended development and testing through 2030. Program Wide Support leverages consolidated contracts for engineering, technical, and management services, with a focus on achieving small business participation goals. These approaches enable MDA to maintain a robust missile defense posture while adapting to technological advancements and changing national security requirements.

Justification for the Improved Homeland Defense Interceptors program is grounded in the need to address rapidly evolving missile threats from rogue states and peer adversaries. The President's January 2025 Executive Order established the protection of U.S. citizens and critical infrastructure as a top priority, mandating the development of next-generation missile defenses. The NGI is designed to be upgradeable to counter future and advancing threats, ensuring the GMD Weapon System remains effective and resilient. Mandatory funds in FY 2026 specifically support booster development to maintain the schedule for initial operational capability in FY 2028, aligning with national defense policy objectives.