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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Sr Principal Systems Test Engineer - **Company:** Northrop Grumman - **Location:** Elkridge, MD, United States - **Experience:** Expert - **Salary:** $123,400.0 - $185,000.0 - **Contract:** Permanent contract - **Skills:** Adobe InDesign, Network Analysis, Computer Networks, PC Tools, Microsoft Office, System Integration Testing, SC Clearance, Cisco - **Published:** July 10, 2026 - **Apply:** https://www.careerjet.com/job/us94429c5421732c40323aca5c2a02fd1d/eaa ## About the Role Bachelor's degree and 8 years of relevant experience; or a Master's degree and 6 years of relevant experience; Experience interpreting one or more of the following: Technical Drawings, Diagrams, Instructions, or Schematics Experience with electrical safety procedures, hazardous material handling and use of Personal Protective Equipment (PPE) Familiarity with electronic test equipment such as Digital Multi-Meters (DMM's), oscilloscopes, power supplies. Network analyzers, power meters or break out boxes Familiarity with System Integration Test and Evaluation and processes and procedures or equivalent Must have the physical ability to easily maneuver around equipment in test lab, lift equipment weighing up to 40 pounds; this may include, lifting and moving heavy test equipment, cables, and radar system structures (legs, sand pads, etc.). Practical experience with maintenance processes and procedures Must possess excellent Interpersonal, written, and verbal communication skills and flexibility with this position. Personal computer skills (competent with MS Office applications) General Networking skills preferably with CISCO equipment such as, setting up switches. System administration skills setting up computer networks Ability to support multiple shifts and CONUS/OCONUS travel. U.S. Citizenship and active/current U.S. Government Secret clearance are required. Preferred Qualifications: Military background a plus Proficient at collaborating with customers and NGC counterparts to define, refine, and maintain program strategies. Practical experience with Air Defense/Surveillance Radar (TPS78, TPS-75, TPS70 and TPS43 RADAR systems) Practical experience with maintenance processes and procedures, to include echelons/levels of maintenance (i.e. 1st through 4th echelon, or field level) Familiarity with logistics support and repair parts requisition processes Able to plan and carry out difficult and complex assignments and develop new methods, approaches, and procedures Practical experience operating, maintaining and troubleshooting radar systems Practical experience with deployment and setup of ground-based mobile radar systems ## Description Northrop Grumman Mission Systems is looking for you to join our team as a Sr Principal Systems Test Engineer based out of Elkridge, MD. This role includes CONUS/OCONUS travel. During travel you will be eligible to receive domestic/international assignment benefits, allowances and/or premiums negotiated between Northrop Grumman and the customer. What You'll get to Do: The candidate will provide direct technical support for the AN/TPS-78 Ground/Base RADAR system. In this role they will provide expert technical advice in the production, operation, training, maintenance and repair of TPS-78 systems. In addition, the candidate will: provide technical assistance to foreign and domestic Military customers in the setup, operation, troubleshooting and repairs of deployed TPS-78 systems. The candidate can be called upon to provide remote support and/or on-site troubleshooting and repair in response to requests for technical assistance. In response for these requests the candidate can be called upon to provide refresher training; documentation of the results of maintenance, troubleshooting and problem resolution actions. Roles and Responsibilities: Provide subject matter expertise on system operations, signal flow, electronics theory, troubleshooting, and fault isolation Support engineering efforts related to the development, testing and analysis of upgrades, replacement or modifications in design and/or procedural use changes. Ensure other personnel are adhering to established procedures and schedules Aid in training and courseware/product development Participate in testing and evaluation of TPS-78 system improvements and new software baselines, documenting test results and recommendations Participate in technical documentation review and modifications Perform routine preventative maintenance on equipment ## Related Videos - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [How Cisco embraced a DevOps culture within its network engineering team](https://www.wearedevelopers.com/videos/99-how-cisco-embraced-a-devops-culture-within-its-network-engineering-team) - [Wolfenstein 3D Postmortem](https://www.wearedevelopers.com/videos/525-wolfenstein-3d-postmortem) - [Designing UX for SRE Agents in High-Stakes Incidents](https://www.wearedevelopers.com/videos/100003-designing-ux-for-sre-agents-in-high-stakes-incidents) - [Computer Vision from the Edge to the Cloud done easy](https://www.wearedevelopers.com/videos/263-computer-vision-from-the-edge-to-the-cloud-done-easy) - [WeAreDevelopers LIVE - Demo Time, Live Coding, End-to-End Testing and more](https://www.wearedevelopers.com/videos/1713-wearedevelopers-live-demo-time-live-coding-end-to-end-testing-and-more) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [Quick guide: How to write a Software Developer CV](https://www.wearedevelopers.com/magazine/37-quick-guide-how-to-write-a-software-developer-cv) - [Should senior developers refuse interview coding challenges?](https://www.wearedevelopers.com/magazine/29-should-senior-developers-refuse-interview-coding-challenges) - [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) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated)