# USAF Completes Sentinel ICBM Stacking Demo

The U.S. Air Force and Northrop Grumman have successfully completed a critical vertical stacking demonstration of the LGM-35A Sentinel intercontinental ballistic missile at Vandenberg Space Force Base in California. This milestone confirms the design maturity of the Sentinel missile system and positions the program on track for initial flight testing scheduled in 2027. The demonstration reflects ongoing strategic missile modernization efforts and signals continued procurement and development opportunities for contractors supporting the Sentinel program.

- The vertical stacking demo validates key technical readiness, supporting upcoming flight test phases in 2027
- Northrop Grumman remains the prime contractor, indicating potential subcontracting and supply chain opportunities
- Procurement professionals should anticipate further solicitations related to missile testing, integration, and sustainment
- The program's progress underscores sustained investment in strategic deterrent modernization, relevant for defense industry planning and resource allocation

**Jurisdictions:** federal
**Industries:** Defense & Military
**Topics:** Physical Infrastructure
**Published:** September 14, 2026

### Government Entities
- U.S. Air Force (USAF)
- Vandenberg Space Force Base

### Vendors
- Northrop Grumman (prime contractor)

### Sources
- [USAF, Northrop Detail Sentinel ICBM ‘Vertical Stacking’ Demo, On Track For Flight Tests In 2027 - Defense Daily](https://www.defensedaily.com/usaf-northrop-detail-sentinel-icbm-vertical-stacking-demo-on-track-for-flight-tests-in-2027/air-force) - Defense Daily