> Markdown version of [/jobs/ext/1919271-sentinel-principal-sr-principal-systems-engineer-16820](https://www.wearedevelopers.com/jobs/ext/1919271-sentinel-principal-sr-principal-systems-engineer-16820). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Sentinel - Principal / Sr Principal Systems Engineer - 16820* - **Company:** Northrop Grumman - **Location:** Bellevue, NE, United States - **Experience:** Expert - **Salary:** $98,400.0 - $184,200.0 - **Contract:** Permanent contract - **Skills:** Systems Engineering, Cyber Security, Rhapsody, Requirements Management, Requirements Traceability, SAP (Applications), Software Requirements Analysis, MagicDraw - **Published:** August 4, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=046e1fc671a91a77 ## About the Role This requisition may be filled at either the Principal Systems Engineer level (T-03) or Sr. Principal Systems Engineer level (T-04). Required for both levels: * Must be a US Citizen with an active DoD Secret Clearance, at time of application, current and within scope, with an investigation date within the last 6 years * Must have the ability to obtain and maintain Special Access Program (SAP) approval within a reasonable period of time, as determined by the company to meet its business need, * Bachelor's degree in a Science, Technology, Engineering or Mathematics (STEM) discipline from an accredited university and 5 years of experience with Bachelor's degree, 3 years of experience with Master's degree, 1 year with a PhD * 1+ years of experience developing or reviewing requirements within DOORS or similar tool * 1+ year experience in ICBM (MMIII or Sentinel) OR complex aerospace/defense systems * 1+ year experience in team environments with leadership responsibilities * 1+ year experience creating, updating, and maintaining system performance documentation, * Bachelor's degree in a Science, Technology, Engineering or Mathematics (STEM) discipline from an accredited university and 8 Years of related experience; 6 Years with Masters; 4 Years with PhD * 2+ years of experience with requirements management / analysis / allocations * 2+ years of experience with Model-Based Engineering / Model-Based Systems Engineering (MBE/MBSE) practices, languages and/or tools such as Cameo, Rhapsody or MagicDRAW * 2+ years of experience with one or more of the following: Command & Control (C2), physical security, cybersecurity, Nuclear Command, Control, and Communications (NC3) systems / processes, communications systems, facility design, military aerospace development (e.g. Sentinel, Minute Man III, B-2, B-21 delivery systems) Preferred Qualifications: * 1+ years of experience developing or reviewing requirements within DOORS or similar tool * Self-driven, able to tackle challenges, solve problems with minimal oversight and make recommendations for solutions/process improvement to leadership * 1+ year experience in team environments with leadership responsibilities * 1+ year experience creating, updating, and maintaining system performance documentation * Self-driven, able to tackle challenges, solve problems with minimal oversight and make recommendations for solutions/process improvement to leadership * Strong written and verbal communication skills ## Description Northrop Grumman Defense Systems is seeking a Principal Systems Engineer (level 3) / Sr. Principal Systems Engineer (level 4) in support of the Sentinel program. This opening is in Roy, UT or Bellevue, NE and will support the Sentinel Program. Northrop Grumman supports the Air Force's sustainment, development, production and deployment of hardware and system modifications for Intercontinental Ballistic Missile (ICBM) Ground and Airborne Launch Control Systems, Launch Facilities, and associated infrastructure., The Sentinel program has an exciting opportunity for a Systems Engineer to join the team supporting activities including use case development, requirements definition / allocation, functional decomposition, interface definition, verification & validation, and requirements traceability. Specific duties to include, but are not limited to the following: * Collaborate with program IPT counterparts to develop supporting systems engineering and design artifacts * Work with both technical teams and stakeholders to develop and mature architecture content of large programs design * Help develop and incorporate the appropriate requirements for the system and ensure that they are properly represented in the model * Develop systems architecture using Cameo Enterprise Architecture (behavioral, structural, analytical) * Contribute to system requirements development, management, and analysis * Develop unifying model techniques, procedures, and processes (for model development, tool integration, and team integration) ## Related Videos - [Thinking Differently - How to Make Money from Cyber Attacks & Cheats](https://www.wearedevelopers.com/videos/745-thinking-differently-how-to-make-money-from-cyber-attacks-cheats) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [One Pipeline, Three Regulator - SBOM Compliance for the Developer](https://www.wearedevelopers.com/videos/100169-one-pipeline-three-regulator-sbom-compliance-for-the-developer) - [Cyber Security: Small, and Large!](https://www.wearedevelopers.com/videos/259-cyber-security-small-and-large) - [Less Is More: How Lagom and Agile Can Create Harmonious Workflows](https://www.wearedevelopers.com/videos/1993-less-is-more-how-lagom-and-agile-can-create-harmonious-workflows) - [Why Your Best Mediors Never Become Seniors (And How to Fix It)](https://www.wearedevelopers.com/videos/2108-why-your-best-mediors-never-become-seniors-and-how-to-fix-it) ## Related Articles - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Résumé-Driven Development: How IT trends affect the job market for software developers](https://www.wearedevelopers.com/magazine/59-resume-driven-development-how-it-trends-affect-the-job-market-for-software-developers) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023)