Sr. Principal Systems Engineer

Relocation assistance may be available.

Clearance required:

Top Secret.

Travel: 10% of the time.

Northrop Grumman Defense Systems seeks a Sr. Principal Systems Engineer at Roy, Utah to work on a restricted effort within the Flight Systems Futures Operating Unit. The role focuses on advanced payloads and hypersonic re‑entry vehicle technology.

• Contribute to the definition and evolution of system architecture using Model-Based Systems Engineering (MBSE) tools such as IBM Rhapsody and Cameo Systems Modeler.
• Generate, allocate, and trace requirements across the system hierarchy; develop verification methodologies that meet Navy and DoD standards.
• Author requirement sets and produce Interface Control Documents (ICDs) that precisely define internal and external system interfaces.
• Create and coordinate customer deliverables (technical reports, trade studies, compliance matrices) for program reviews and external stakeholders.
• Participate in laboratory demonstrations and hardware‑in‑the‑loop (HIL) testing to validate system behavior against requirements.
• Lead cross‑functional reviews (design, trade, verification) and ensure compliance with engineering processes (CMMI, DO‑178C, MISRAC, NQA‑1).
• Mentor junior engineers and foster best practices in requirements management, verification planning, and MBSE modeling.

• Bachelor’s degree in Systems, Software, or a related STEM field with 8 years of experience; or 6 years of experience with a Master’s (MS) degree; or 4 years of experience with a STEM PhD.
• U.S. citizen with an active U.S. Government Top Secret clearance at the time of application and within the last six years.
• Successfully screened for Enhanced Security Clearances within the timeframe required to meet business needs.
• Three or more years of full‑lifecycle experience (concept, development, verification, sustainment) with SysML‑based MBSE tools (IBM Rhapsody, Cameo, SysMLv2).
• Three or more years experience writing, managing, and tracing complex requirements (e.g., using DOORS, Jama, or Polarion) and defining verification plans, test procedures, and ICDs for hardware, software, and external system interfaces.
• Strong written and verbal communication skills; ability to produce clear technical documentation and present to senior leadership and customers.

• Hands‑on experience conducting laboratory demonstrations and integrating system models with test rigs.
• Direct exposure to Nuclear Surety and Nuclear Safety systems (e.g., NQA‑1, DOE safety standards).
• Familiarity with model‑based test generation and automated test frameworks.
• Familiarity with Northrop Grumman engineering standards (CMMI, DO‑178C, MIL‑STD‑498, NQA‑1) and safety‑critical development practices.
• Basic proficiency in Python or MATLAB for data analysis and test automation.
• Professional certifications such as INCOSE Certified Systems Engineering Professional or Certified MBSE.

• Medical, Dental & Vision coverage
• 401(k) plan
• Educational assistance
• Life insurance
• Employee assistance programs & work/life solutions
• Paid time off
• Health & wellness resources
• Employee discounts

Work schedule:

9/80 (nine‑hour days Monday‑Thursday, alternate Fridays off).

Primary Level Salary Range: $ – $. Base salary is determined by scope, responsibilities, experience, education, and market conditions.

Eligible for discretionary bonuses, overtime, shift differential, and long‑term incentives for certain positions.

Northrop Grumman is an Equal Opportunity Employer. Decisions are made without regard to race, color, religion, creed, sex, sexual orientation, gender identity, marital status, national origin, age, veteran status, disability, or other protected class. U.S. citizenship is required for positions with government clearance. For the full EEO and pay transparency statement, please visit