Systems Modeling and Simulation Engineer – Principal/Senior Principal

Northrop Grumman

Systems Modeling and Simulation Engineer developing software solutions for defense technologies at Northrop Grumman. Collaborating with Integrated Product Teams on high-performance applications in a structured environment.

Posted 6/25/2026full-timeSan Diego • California • 🇺🇸 United StatesSenior💰 $114,000 - $171,000 per yearWebsite

Tech Stack

Tools & technologies

GRPCJava.NETTFSWPF

About the role

Key responsibilities & impact

Utilize full life cycle design, implementation, and unit testing of software using C# / .NET (including CLR, garbage collection, JIT compilation).
Leverage core computer science fundamentals—algorithms, data structures, and complexity analysis—to solve logical and mathematical problems.
Develop, profile, and tune high performance, optimized code; conduct runtime analysis and memory usage profiling.
Build and maintain desktop applications with WPF and the MVVM pattern; extend MVVM concepts to modern UI frameworks such as Blazor while preserving a consistent architecture across platforms.
Design and publish reusable UI component libraries that work in both WPF and Blazor environments.
Implement common application patterns (CRUD, DTO design, gRPC services) to enable efficient data exchange.
Create and maintain technical documentation; translate design decisions for both technical and non-technical stakeholders.

Requirements

What you’ll need

Must have a Bachelor of Science degree in a STEM field and 5 years of relevant military / professional experience, OR a Master of Science degree in a STEM field 3 years of relevant military / professional experience, OR a PhD and 1 year of relevant military / professional experience
Must have an active U.S. Government Secret Clearance or higher
Strong grasp of agile software development methodologies
Proficiency with Object Oriented languages (C#, C++, Java, etc.) and Windows based development
Demonstrated expertise in the .NET runtime, CLR internals, garbage collection, and JIT compilation
Proven ability to write highly optimized, performant code and conduct profiling/tuning
Expert use of Visual Studio (debugging, refactoring, performance analysis)
Significant experience with version control tools (Bitbucket, GitHub, GitLab, Git, TFS) and CI/CD pipelines.
A good knowledge of secure coding standards and relevant defense compliance (NIST, DoD).

Benefits

Comp & perks

Health insurance coverage
Life and disability insurance
Savings plan
Company paid holidays
Paid time off (PTO) for vacation and/or personal business

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

C#.NETalgorithmsdata structurescomplexity analysisWPFMVVMgRPCCRUDDTO design

Soft Skills

communicationproblem solvingtechnical documentationstakeholder engagement

Certifications

Bachelor of ScienceMaster of SciencePhDU.S. Government Secret Clearance