Lockheed's ICBM Interceptor Hits Key Testing Milestones

"These milestones are major steps toward our path to CDR, confirming our utmost confidence that NGI will meet the demanding performance envelope on track for fielding by 2030," Christopher Jewell, Lockheed Martin’s NGI vice president, told reporters on Monday evening.

Two motor tests clear critical technical hurdles

Lockheed Martin announced two discrete propulsion milestones this week for the Next Generation Interceptor (NGI). Company officials said last week that NGI had completed a critical burst test of its second-stage motor case, and on Monday they announced a successful static test fire of the stage‑2 rocket motor. Lockheed frames both events as major steps toward the program’s Critical Design Review (CDR), which the company expects to clear by the end of 2026.

Contract, delay and the technical problems that followed

The Missile Defense Agency awarded Lockheed an $18 billion contract in 2024 to design and build NGI. In April, MDA director Gen. Heath Collins told lawmakers the program had slipped 18 months because of "several technical problems" but remained on track to pass the design review in 2026. Collins identified multiple trouble spots during a Senate Armed Services Committee hearing on April 30, including the solid rocket motor, the inertia measurement movement, and some sensor issues.

Omission from the GAO 2026 assessment

The Government Accountability Office’s 2026 weapons system assessment did not include information on NGI. The GAO said it excluded the program "due to the lack of long-term cost and schedule baselines, which we could use to measure progress." The omission leaves fewer publicly documented baselines against which to compare Lockheed’s announced test results and the MDA’s schedule adjustments.

NGI’s place inside the Golden Dome architecture

NGI is slated to be part of the Golden Dome defense system created under the Trump administration. The Space and Missile Defense Symposium this week is expected to feature more discussion of Golden Dome than last year’s conference, when officials were ordered not to discuss the program amid a "general crackdown on public discussion" by Defense Secretary Pete Hegseth. Gen. Michael Guetlein, the Golden Dome director, is scheduled to brief attendees on program progress during the symposium.

How Lockheed Martin, the MDA, and Gen. Michael Guetlein are positioned

• Lockheed Martin: The company is presenting test completions ― the stage‑2 static fire and the second‑stage motor case burst test ― as proof points it can advance to CDR and move toward manufacturing and eventual fielding by 2030, per Christopher Jewell’s remarks.
• Missile Defense Agency (Gen. Heath Collins): MDA has acknowledged an 18‑month schedule slip tied to "technical problems" and told Congress it is working to "buy down those risks" as the program transitions into manufacturing, specifically citing motors, the inertia measurement movement, and sensors.
• Gen. Michael Guetlein and U.S. Northern Command leader Gen. Gregory Guillot: Collins said he, Guetlein, and Gen. Guillot "are regularly talking about Next‑Gen Interceptor and the important part it plays in the layered defense of our homeland," signaling ongoing operational and implementation coordination among acquisition, program leadership, and command stakeholders.

Lockheed’s public cadence — test, then test, then push toward CDR — now meets parallel declarations from the MDA that the program remains on a path to review in 2026 despite earlier slippage. Yet the GAO’s omission of NGI from its 2026 weapons system assessment and the MDA’s reported technical concerns leave tangible questions on the table: can the program translate recent static and burst tests into stable baselines for cost and schedule, and will it clear the CDR by the end of the year as planned? The Space and Missile Defense Symposium, including Gen. Guetlein’s scheduled update, is the immediate venue where some of those answers may begin to be publicized.

Source: Defense One — ICBM killer passes two key tests ahead of design review, Lockheed says