Principal Mechanical Engineer

Job DescriptionMercury Systems is seeking the best and brightest engineering talent to help us deliver cutting‑edge technology for mission‑critical aerospace and defense applications, advancing innovation where it matters most.In this role, our team is looking for an experienced, motivated engineer eager to make a meaningful impact from day one. As a principal mechanical engineer, you will take a hands‑on role in designing, analyzing, and testing complex electronics subsystems that directly support mission‑critical product development. You will bring fresh thinking and technical leadership to challenging design problems, helping drive continuous improvement and engineering excellence. Working in a collaborative, fast‑paced environment, you’ll play a significant part in shaping reliable, cutting‑edge technology that aligns with the company’s commitment to innovation, quality, and customer success. Job Responsibilities:Design and develop electronic module assemblies using open standards, including mechanical packaging, printed wiring board layouts, ECAD support, connector selection, cable and label design, prototype inspection, and environmental testingPerform mechanical packaging tasks for electronics integrated within larger subsystems, including backplane and cable designCollaborate daily with cross‑functional teams such as Hardware/Electrical Engineering, Manufacturing, Quality Engineering, and ProcurementLead products from concept through design, integration, testing, and final production releaseConceptualize, design, develop, and analyze mechanical hardware and systems for rugged military applications, including thermal, structural, reliability, materials, and tolerance analysesDesign complex fixtures to support testing and advanced manufacturing processesCreate detailed 3D models and engineering drawings using SolidWorksConduct peer reviews of designs, analyses, and engineering documentationCommunicate and present technical concepts and product documentation to diverse internal and external audiencesSupport product verification testing, including thermal, airflow, vibration, mechanical shock, humidity, and environmental stress screeningCoordinate procurement of prototype materials and validate form, fit, and functionPerform failure analysis of discrepant materials in partnership with Manufacturing and Quality teamsDevelop test plans, inspection reports, and documentation for verification and validation activitiesCreate and maintain Bills of Material (BOMs/PLs)Draft and manage Engineering Change Requests (ECRs) and Engineering Change Orders (ECOs)Support sustaining engineering and legacy product effortsRequired Qualifications:Bachelor’s degree in mechanical engineering, aerospace engineering, or a related technical disciplineTypically requires a minimum of 6+ years of related industry experienceStrong experience in electronics packaging, design, and processesSolid understanding of structural dynamics, heat transfer, and thermal management of electronics Knowledge of conventional manufacturing methods and advanced manufacturing, including additive manufacturingProficiency with 3D CAD software, preferably SolidWorksFamiliarity with material control processes and documentation, including routers and work instructions, as well as related systems i.e. Agile, Oracle, EPDMThis position is onsite in Andover, MA or Hudson, NH.“This position requires you to access information that is subject to U.S. export regulations. You may only access such information if you are a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. government.”Preferred Qualifications:Master's degree in mechanical or aerospace engineering or a related technical discipline10+ years' experienceFamiliarity with RF Engineering practicesStrong proficiency with GD&T and tolerance analysisProficient in SolidWorksExperience conducting thermal analysis using tools such as 6Sigma or CelsiusExperience with structural analysis using tools such as SolidWorks Simulation, Femap/NASTRAN #LI-RJ1Job RequirementsWhy should you join Mercury Systems?Mercury Systems is a technology company that makes the world a safer, more secure place. We push processing power to the tactical edge, making the latest commercial technologies profoundly more accessible for today's most challenging aerospace and defense missions. From silicon to system scale, Mercury enables customers to accelerate innovation and turn data into decision superiority. Headquartered in Andover, Massachusetts, Mercury employs more than 2,300 people in 24 locations worldwide. To learn more, visit mrcy.comOur CultureWe are committed to making Mercury a great place to work, no matter where our employees are located. We offer a casual and enjoyable atmosphere that allows employees to learn and grow. We help and care for one another and work as one to achieve results for us and for our customers. We value communication and transparency, and strive to foster two-way dialogue at all levels of the organization. We are committed to lifelong learning, offering comprehensive skills training and tuition reimbursement. Whether you're just starting out on your career journey or you are an experienced professional, it's important to us that you feel recognized and rewarded for your contributions.To find out more about Why Mercury?, or visit the Mercury Community or find answers to general questions at Mercury FAQsMercury Systems is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, age, sex (including pregnancy), sexual orientation, gender identity, national origin, genetic information, creed, citizenship, disability, protected veteran or marital status.As an equal opportunity employer, Mercury Systems is committed to a diverse workforce. In order to ensure reasonable accommodation for individuals protected by Section 503 of the Rehabilitation Act of 1973, the Vietnam Veterans' Readjustment Act of 1974, and Title I of the Americans with Disabilities Act of 1990, applicants that require accommodation in the job application process may contact the number below for assistance.(978) 256-1300Click here read about our recent press release.Job DetailsJob Type: Full-timeCategory: EngineeringSalaried: Salaried