About Sentinel

About Sentinel

Northrop Grumman Awarded Contract to Replace the Aging ICBM System

Men in headseht in controll room

About Sentinel

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

In Sept 2020, the U.S. Air Force awarded a Northrop Grumman-led team the Sentinel prime contract for the Engineering and Manufacturing Development phase. Using a digital engineering approach, Sentinel will be a fully integrated weapon system that will meet the combatant commander’s current needs, while having the flexibility to affordably address changing technology and emerging threats for decades to come.

Hudson Institute report touts the advantages of GBSD program

Why Modernize?

The (Sentinel) Ground Based Strategic Deterrent (GBSD) Analysis of Alternatives provided decisive analysis that continued life extension of the Minuteman III (MM III) would be more costly than a replacement system and would not address future challenges and threats to our current ICBM force. (Sentinel) is the lowest risk, highest value decision to meet current and future military requirements.” USSTRATCOM’s Statement to Congress, Feb 2020; pg. 9.

OSD Fact Sheet: The Importance of Modernizing the Nuclear Triad

Sentinel Teammates – Roles and Responsibilities

The Northrop Grumman 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 system. Our team has invested significantly in the people, facilities and tools needed to be ready, and is committed to deliver Sentinel – on schedule – that meets the nation’s needs. Learn more about the Northrop Grumman-led 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

Timeline

2010 – Nuclear Posture Review

2012 – Analysis of Alternatives (AoA) begins

2015 – Milestone A/AOA approved

2016 – TMRR begins

2017 – TMRR award

2018 – Nuclear Posture Review

2019 – July – RFP released

2020 – September EMD Award

2029 – Sentinel program will deliver a fully integrated weapon system beginning in FY2029

2036 – Full Operational Capability

2075 – Program remains in service

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