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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # STS Principal Test Development Eng 4 - **Company:** Legion Technical Solutions, LLC - **Location:** Tewksbury, MA, United States - **Experience:** Expert - **Salary:** $135,000.0 - $150,000.0 - **Contract:** Permanent contract - **Skills:** Analog Electronics, Automation of Tests, Boolean Algebra, C Sharp (Programming Language), LabVIEW, Microsoft Project, OrCAD, Software Engineering, Systems Integration, Teststand - **Published:** September 5, 2026 - **Apply:** https://www.clearancejobs.com/jobs/9146198/sts-principal-test-development-eng-4 ## About the Role * Electrical Test Instrument/Equipment experience * Power, RF, Digital Logic, Analog circuit knowledge * Automated Test Software development experience Desired Skills (Nice-to-Have) * Experience with project leadership, project cost and schedule management, i.e. EVMS, MS Project * DoW (DoD) project development life-cycle processes Tools / Technologies Required * Automated test software (C/C++/C#, LabView, TestStand) * ORCAD and/or Cadence Allegro for PCB design, experience in any of the following: Power, RF, Digital Logic Experience Required: Minumum of 8-10 years experience Education Required: STEM bachelor's degree The Environment This position is best suited for an engineer who is comfortable balancing individual technical ownership with teamwork. You should be prepared to operate in a structured development environment, participate in recurring project meetings, communicate progress consistently, and collaborate across multiple electrical engineering disciplines. ## Description Legion Technical Solutions (LTS) is seeking an experienced Principal Test Development Engineer to support a leading aerospace and defense client's Sensor Test Solutions organization. In this role, you will join a multidisciplinary engineering team responsible for designing, integrating, and deploying sophisticated test equipment. These systems support an Andover, Massachusetts factory as well as depot facilities located domestically and internationally. This is an excellent opportunity for a senior engineer who enjoys hands-on technical work and can contribute across electrical hardware, test instrumentation, fixture development, PCB design, and automated test software. What You Will Do * Design electrical test stations and test fixtures * Perform electrical schematic capture and support PCB design * Develop and integrate automated test software * Execute assigned technical tasks in a collaborative team environment * Support scheduled project and technical meetings * Report technical progress periodically, including daily or weekly updates as required by the project lead * Collaborate with engineers specializing in RF, power, digital, analog, hardware, and software * Support the integration, troubleshooting, and deployment of test equipment * Contribute within a structured, process-heavy engineering environment What Success Looks Like You will come up to speed quickly and make a meaningful contribution to projects involving test stations, fixtures, and automated test software. You will work effectively within project teams typically consisting of five to ten engineers and demonstrate the technical aptitude, communication skills, and collaborative approach needed to deliver reliable test solutions. At the principal level, you will also bring the experience and judgment needed to help guide technical execution, communicate risks, and support successful project delivery. ## Related Videos - [How to TDD in legacy code](https://www.wearedevelopers.com/videos/309-how-to-tdd-in-legacy-code) - [More efficient software for more efficient microchips](https://www.wearedevelopers.com/videos/1164-more-efficient-software-for-more-efficient-microchips) - [SMART Test Automation - the experience of legacy transformation](https://www.wearedevelopers.com/videos/100215-smart-test-automation-the-experience-of-legacy-transformation) ## Related Articles - [The 8 Best Code Testing Tools](https://www.wearedevelopers.com/magazine/402-the-8-best-code-testing-tools) - [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) - [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) - [What is a Test Plan: Guide to Test Planning](https://www.wearedevelopers.com/magazine/191-what-is-a-test-plan-guide-to-test-planning) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs)