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Principal Mechanical Engineer, Development

BAE Systems

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Nashua, New Hampshire

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PERMANENT

REMOTE/WORK

FROM HOME

Updated 09/07/2026

Job Description

Job Summary

Job Description

BAE Systems is seeking a Senior Mechanical Engineer to join our team in Nashua, NH!

"We Protect Those Who Protect Us®" is our mission, and we're looking for engineers who share our passion in developing a full range of first-of-its-kind technologies and equipment to protect air, land, and naval warfighters on all fronts. At our Nashua, New Hampshire site, the Countermeasure & Electromagnetic Attack Solutions team provides next-generation threat detection and countermeasure solutions that provide unparalleled electronic warfare capabilities to enhance mission survivability.

If you are an individual who thrives in Agile hardware development environments, then we are interested in hearing from you! This exciting role spans the full product lifecycle - business capture, development, production, testing, sustaining - for a variety of complex defense products and technologies. You will collaborate closely with other electrical, mechanical, software, firmware and test engineers, as well as product managers and stakeholders to develop excellent solutions.

We are looking for candidates who are detail-oriented, possess strong analytical skills, and have a passion for continuous improvement. You will be responsible for ensuring the performance, quality, and reliability of electronic products through rigorous design, analysis, and testing. In addition, the ideal candidate has experience with, and is a strong advocate of, Agile hardware development, risk-reduction prototyping, and requirements-driven design and verification.

Typical duties assigned to this position:

Lead mechanical engineering designs, development, integration/test, and production of complex and dynamic military systems

Generate 3D solid models, drawings, and documentation utilizing GD&T principles

Perform tolerance analyses to assure fit & function

Perform thermal, structural/stress, and modal/vibration analyses

Assess designs against environmental requirements

Develop prototypes and conduct test and verification efforts

Partner with other engineering disciplines and operations personnel to develop solutions that adhere to DTUPC, DFT, and DFM requirements

Support resolution of technical issues discovered during manufacture and test of deliverable hardware

Evaluate and troubleshoot mechanical faults and issues, assessing test failures for root cause, identifying disposition/corrective actions

Design test equipment to ensure the performance and integrity of manufactured products

Participate in requirements development, performing technical trade studies, and evaluating technology insertion/upgrades

Develop and execute test plans, which includes the integration of test solutions, and provide detailed reports on test result

Participate in new business capture

The ideal candidate will thrive in a learning environment that encourages leadership and technical growth.

Because of the need for consistent, in-person collaboration and/or the requirement to perform all work onsite due to the nature of this particular role, it will be performed full-time on site.

Requirements

Required Education, Experience, & Skills

Bachelor's degree in Mechanical Engineering

4+ years (or 2+ years with MS ME) designing, testing, and troubleshooting high-reliability mechanical systems

Demonstrated understanding of mechanical principles, test methodologies, and the ability to work with advanced test equipment and cutting-edge technology

Strong "hands-on" laboratory experience with instrumentation, equipment, and processes

Eligible to obtain a DOD Security Clearance

Preferred Education, Experience, & Skills

Possess an understanding in the application of heat transfer principles, strength of materials, materials selection, design for vibration environments and the ability to apply those principles to unique mechanical design challenges

Experience with mechanical engineering tools for design and analysis, including ANSYS Workbench/Mechanical, PTC Creo, MATLAB/Simulink, Siemens

NX, ANSYS

Icepak

Familiarity with design, analysis, and manufacturing standards associated with complex multilayer rigid and rigid-flex CCAs

Knowledge of engineering development processes for aero/defense industry, including designing and testing to

ASTM, SAE, DO, MIL-STD-810

A self-starter with Agile hardware development experience

Exceptional degree of ingenuity, creativity, and resourcefulness.

Control account management experience

Experience with LRIP / FRP, especially electronics manufacturing and test methodologies

Familiarity with AS9145 compliant processes

Strong written and verbal communication skills

Active DOD security clearance

Pay Information

Full-Time Salary Range:

$118095 - $200762

Please note: This range is based on our market pay structures. However, individual salaries are determined by a variety of factors including, but not limited to: business considerations, local market conditions, and internal equity, as well as candidate qualifications, such as skills, education, and experience.

Employee Benefits:

At BAE Systems, we support our employees in all aspects of their life, including their health and financial well-being. Regular employees scheduled to work 20+ hours per week are offered: health, dental, and vision insurance; health savings accounts; a 401(k) savings plan; disability coverage; and life and accident insurance. We also have an employee assistance program, a legal plan, and other perks including discounts on things like home, auto, and pet insurance. Our leave programs include paid time off, paid holidays, as well as other types of leave, including paid parental, military, bereavement, and any applicable federal and state sick leave. Employees may participate in the company recognition program to receive monetary or non-monetary recognition awards. Other incentives may be available based on position level and/or job specifics.

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