Principal Mechanical Engineer

Req. Number

26-395

Job Description

Mercury 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 testing

• Perform mechanical packaging tasks for electronics integrated within larger subsystems, including backplane and cable design

• Collaborate daily with cross‑functional teams such as Hardware/Electrical Engineering, Manufacturing, Quality Engineering, and Procurement

• Lead products from concept through design, integration, testing, and final production release

• Conceptualize, design, develop, and analyze mechanical hardware and systems for rugged military applications, including thermal, structural, reliability, materials, and tolerance analyses

• Design complex fixtures to support testing and advanced manufacturing processes

• Create detailed 3D models and engineering drawings using SolidWorks

• Conduct peer reviews of designs, analyses, and engineering documentation

• Communicate and present technical concepts and product documentation to diverse internal and external audiences

• Support product verification testing, including thermal, airflow, vibration, mechanical shock, humidity, and environmental stress screening

• Coordinate procurement of prototype materials and validate form, fit, and function

• Perform failure analysis of discrepant materials in partnership with Manufacturing and Quality teams

• Develop test plans, inspection reports, and documentation for verification and validation activities

• Create 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 efforts

Required Qualifications:

• Bachelor’s degree in mechanical engineering, aerospace engineering, or a related technical discipline

• Typically requires a minimum of 6+ years of related industry experience

• Strong experience in electronics packaging, design, and processes

• Solid understanding of structural dynamics, heat transfer, and thermal management of electronics

• Knowledge of conventional manufacturing methods and advanced manufacturing, including additive manufacturing

• Proficiency with 3D CAD software, preferably SolidWorks

• Familiarity with material control processes and documentation, including routers and work instructions, as well as related systems i.e. Agile, Oracle, EPDM

• This 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 discipline

• 10+ years' experience

• Familiarity with RF Engineering practices

• Strong proficiency with GD&T and tolerance analysis

• Proficient in SolidWorks

• Experience conducting thermal analysis using tools such as 6Sigma or Celsius

• Experience with structural analysis using tools such as SolidWorks Simulation, Femap/NASTRAN

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Why Mercury?

Why 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.com

Our Culture

We 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 FAQs (

Mercury 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.

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