# Systems Engineering

**R-2A activity** of project 655238 — GROUND BASED STRATEGIC DETERRENT (GBSD)  
**Program element:** 0605238F — Ground BASED Strategic Deterrent (GBSD)  
**Component:** U.S. Air Force · **Budget Activity:** 5  
**Vintage:** President's Budget PB2027  
**Canonical URL:** https://hitchintel.com/programs/0605238F/655238/a4  
**Parent:** https://hitchintel.com/programs/0605238F

## Summary

This activity requests $783.0M in FY2027, 17% of project 655238, up 98% on FY2026. The R-2A exhibit describes it across FY2026–FY2027, including what the FY2027 money is planned to buy.

## What the FY2027 request buys

**FY2027 planned work.** Continue to mature Sentinel specifications, architecture, and design through rigorous systems engineering to include modular architectures, external interface management, modeling and simulation, and testing to ensure the appropriate level of maturity required for each technical review. Continue to collaborate with mission partners to enhance capabilities, maintain technical expertise, and ensure seamless integration of critical assets. Continue to improve certification processes, develop a common cryptographic device, and advance model-based systems engineering for efficient sustainment. Continue to align system requirements and architectural documentation. Execute systems security engineering activities: Systems Theoretic Process Analysis (STPA), supply-chain risk management, program protection planning and execution, and multi-disciplinary adversarial emulation and Red Team activities. These efforts will address the risks of a dynamic threat environment, to reduce technical, engineering, integration, test, and lifecycle cost risk. Finalize a comprehensive Survivability Certification Plan to continue, addressing nuclear survivability and hardening requirements. Continue to maintain emphasis on leveraging specialty engineering expertise across all disciplines to deliver a secure, reliable, and sustainable weapon system. This will be achieved through proactive processes, program-wide collaboration, and a focus on quality, timeliness, and cost-effectiveness.

**FY2026 to FY2027 change.** Funding increased due to the risk reduction / parallel path efforts identified through the program restructure activities, TMRR efforts to achieve MS-B, and the EMD prime contract schedule incentive fee identified in the "Omni-Mod” contract framework.

## Before the request year

**FY2026 plans — current year.** Mature Sentinel specifications, architecture, and design through rigorous systems engineering to include modular architectures, external interface management, modeling and simulation, and testing to ensure the appropriate level of maturity required for each technical review. Collaborate with mission partners to enhance capabilities, maintain technical expertise, and ensure seamless integration of critical assets. Improve certification processes, develop a common cryptographic device, and advance model-based systems engineering for efficient sustainment. Align system requirements and architectural documentation. Develop a comprehensive Survivability Certification Plan to address nuclear survivability and hardening requirements. Leverage specialty engineering expertise across all disciplines to deliver a secure, reliable, and sustainable weapon system. This will be achieved through proactive processes, program-wide collaboration, and a focus on quality, timeliness, and cost-effectiveness.

## Funding

| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 303.3 |
| FY2026 | Enacted | 395.9 |
| FY2027 | Request | 783.0 |

> Prior, current and budget year only — an R-2A activity carries no five-year plan. It sums exactly into its project in the request year and not necessarily in any other.

## Other activities in project 655238

- [Flight Systems](https://hitchintel.com/programs/0605238F/655238/a0) — FY2027 1,452.8
- [Command & Launch](https://hitchintel.com/programs/0605238F/655238/a1) — FY2027 981.7
- [Government Support](https://hitchintel.com/programs/0605238F/655238/a6) — FY2027 433.6
- [Test](https://hitchintel.com/programs/0605238F/655238/a5) — FY2027 409.8
- [Software](https://hitchintel.com/programs/0605238F/655238/a3) — FY2027 292.7
- [Infrastructure & Deployment](https://hitchintel.com/programs/0605238F/655238/a2) — FY2027 167.8

## Source & machine access

- **Source:** FY2027 Department of the Air Force RDT&E Budget Justification, Exhibit R-2A, PE 0605238F project 655238 (PB PB2027). Narrative is the government's own text.
- **No marks, no contractors at this grain** — congressional marks land on the program element and R-3 performers on the project.
- **MCP:** `mcp.hitchintel.com` — `budget_get_activity`.

*HitchAI is an independent intelligence service, not affiliated with the U.S. Department of Defense. Budget figures are requests/estimates, not obligations.*