About Sentinel (GBSD)

About Sentinel (GBSD)

Northrop Grumman Awarded Contract to Replace the Aging ICBM System

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About Sentinel (GBSD)

The U.S. Air Force’s LGM-35A Sentinel weapon system, formerly known as the Ground Based Strategic Deterrent (GBSD), is a critical modernization of the ground-based leg of the U.S. nuclear triad, the bedrock of U.S. national security. The Sentinel (GBSD) system replaces the aging Minuteman III intercontinental ballistic missile (ICBM) system, which has been in service for over 50 years.

As the Sentinel (GBSD) prime contractor, Northrop Grumman is producing a modern, integrated system designed to be adaptable to meet future threats and keep pace with emerging technologies. A cornerstone capability of the triad, the system will support global stability by serving as a safe, secure and credible deterrent that will protect our nation and assure allies for decades to come.

Sentinel Fact Sheet
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Reducing Risk through Digital Engineering

The Sentinel (GBSD) system is the Air Force’s first major acquisition program to earn the e-Programs designator. This revolutionary approach for what the government defines as a “mega project” leverages digital engineering, agile software, and open systems architecture to model and authenticate virtual designs, lowering risk and reducing the time it takes to field the system and new technologies.

Hudson Institute report touts the advantages of GBSD program

Future Strategic Deterrence

For the first time in history, the U.S. is facing two near-peer adversaries who are rapidly expanding and modernizing their nuclear weapons. Recognizing the need to maintain a credible deterrent amidst an evolving global security environment, the U.S. is modernizing each leg of the triad.

Minuteman III has served as the ground-based leg of the triad since the 1970s and is the oldest deployed strategic ballistic missile in the world. It has undergone three service-life extension programs to ensure safety and reliability, but major components are aging out, including boosters and guidance systems.

Sentinel (GBSD) Teammates – Roles and Responsibilities

The Northrop Grumman Sentinel (GBSD) nationwide team is developing innovative concepts, technologies, and solutions necessary to meet the Air Force schedule, while delivering a safe, secure, reliable, and effective Sentinel (GBSD) system. Our team has invested significantly in the people, facilities and tools needed to be ready, and is committed to deliver a 21st century Sentinel (GBSD) that meets the nation’s needs. Learn more about the Northrop Grumman-led Sentinel (GBSD) Nationwide Team.

Aerojet_Rocketdyne

Aerojet Rocketdyne

Solid Rocket Motor (SRM) Stage 3 and Post Boost Propulsion System

Bechtel

Bechtel

Launch System Infrastructure Engineering and Construction

CAE

CAE

Training Systems

Clark Construction

Clark Construction

Infrastructure Program Management

Collins Aerospace

Collins Aerospace

Command & Control and Training Systems

General Dynamics

General Dynamics

Command & Control Systems, Digital Engineering Environment, and Aerospace Vehicle Equipment

HDT

HDT Global

Transportation Systems

Honeywell

Honeywell

Guidance & Control Instruments and Booster Control

Kratos

Kratos Defense and Security Solutions

Transportation Systems

Lockheed Martin

Lockheed Martin

Payload Support

Textron Systems

Textron Systems

Re-entry System

Facts and History

ICBM: Over 65 Years of Technical Leadership

Advancing Our Legacy – Northrop Grumman’s History with the ICBM System

Northrop Grumman Sentinel (GBSD) News Releases