Principal Mechanical Engineer

Mercury Systems; California (MO); On-site; USD 110,000 - 150,000; Full time

Job summary

Mercury Systems seeks a principal mechanical engineer to design, analyze, and test rugged subsystems and PCB assemblies for aerospace and defense applications.

You will lead crossfunctional teams, perform thermal and structural analysis, and develop detailed documentation while mentoring junior engineers. This role emphasizes hands-on design in a fastpaced, multidisciplinary environment.

Qualifications

• Bachelor's degree in mechanical or aerospace engineering is required.
• Typically 6+ years of relevant mechanical engineering experience.
• Familiarity with GD&T, ASME Y14.5, Y14.100.
• Experience designing electronics packaging for severe environments, MILSTD810 compliant.
• Proficiency with 3D CAD software such as SolidWorks or CREO.
• Broad knowledge of manufacturing techniques including machining and postprocessing for CCAs and metal components.

Responsibilities

• Lead products through the full lifecycle from concept to production release.
• Mechanical packaging design for rugged subsystems and complex PCB assemblies.
• Collaborate with Hardware/Electrical, Manufacturing, Quality, and Procurement teams.
• Develop and maintain Bills of Material (BOMs/PLs).
• Draft and manage Engineering Change Requests (ECRs) and Engineering Change Orders (ECOs).
• Design mechanical hardware for rugged military and space environments.
• Conduct thermal/structural analysis or simulations for performance.
• Create 3D models and detailed engineering drawings.
• Produce clear documentation for internal and external audiences.
• Provide handson support during build validation and ECR/QA processes.
• Mentor and train junior engineers.

Skills

Mechanical design

Electronics packaging

GD&T

3D CAD (SolidWorks/CREO)

Thermal analysis

Vibration and shock analysis

Manufacturing processes

Technical documentation

Security clearance eligibility

Education

Bachelor's degree in mechanical or aerospace engineering

Master's degree in mechanical or aerospace engineering

Tools

SolidWorks

CREO

Job description

Job Summary

Mercury Systems is seeking the best and brightest engineering talent to help us deliver cuttingedge technology for missioncritical aerospace and defense applications, advancing innovation where it matters most.

This is a great opportunity for a principal level mechanical engineer to join a high-performing enigneering team who brings technical experience and a fresh perspective to complex design challenges. You will play a handson role in designing, analyzing, and testing rugged subsystems and complex PCB assemblies that are core to Mercury's highperformance product portfolio. The ideal candidate thrives in a fastpaced, multidisciplinary environment and is driven to translate innovative ideas into impactful, missionready solutions.

Job Responsibilities

• Lead products through the full lifecycle; from concept development to integration, testing, and production release.
• Perform mechanical engineering activities for rugged subsystems and complex PCB assemblies, including mechanical packaging, connector selection, cable and label design, prototype inspection and assembly, environmental testing, and supporting hardware documentation procurement
• Collaborate closely with crossfunctional partners such as Hardware/Electrical Engineering, Manufacturing, Quality Engineering, and Procurement
• Develop and maintain Bills of Material (BOMs/PLs) to support accurate configuration and production control
• Draft, submit, and manage Engineering Change Requests (ECRs) and Engineering Change Orders (ECOs)
• Conceptualize, design, analyze, and document mechanical hardware and systems intended for rugged military and space environments
• Conduct thermal and structural analysis and/or simulations to ensure robust mechanical and environmental performance
• Design complex fixtures to support product testing and advanced manufacturing processes
• Create detailed 3D models and engineering drawings
• Communicate design concepts and produce clear, highquality product documentation for diverse internal and external audiences
• Support environmental and functional design verification testing in accordance with MILSTD810 for severe operating conditions
• Provide handson support during initial build validation of new designs, ensuring form, fit, and function are met
• Perform failure analysis of discrepant material in partnership with Manufacturing and Quality Engineering teams
• Develop test plans, inspection reports, and associated documentation in support of verification and validation activities
• Mentor and train junior engineers

Required Qualifications

• Bachelor's degree in mechanical or aerospace engineering
• Typically requires a minimum of 6 years of relevant mechanical engineering experience
• Familiarity with GD&T, ASME Y14.5, Y14.100
• Experience and understanding of PWA/CCA design and associated manufacturing processes
• Proven experience designing electronics packaging for severe environments, including compliance with MILSTD810
• Proficiency with 3D CAD software such as SolidWorks or CREO
• Broad knowledge of both conventional and advanced manufacturing techniques, including machining and postprocessing for CCAs and metal components
• Strong foundational understanding of heattransfer design principles and dynamic system design for shock and random vibration environments
• Familiarity with configuration management and material control processes, including routers, work instructions, and related tools i.e. Agile, Oracle, EPDM Proficiency with standard engineering documentation and presentation tools
• This role requires the ability to obtain and maintain a U.S. government security clearance; U.S. citizenship is required

Preferred Qualifications

• Master's degree in mechanical or aerospace engineering
• Aerospace and Defense Industry experience
• Expertise with GD&T, ASME Y14.5, Y14.100
• Experience performing thermal analysis using tools such as 6Sigma, Celsius, SC Stream, or SC Flow
• Experience performing Structural analysis using tools such as SolidWorks Simulation, Femap/NASTRAN)

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 aboutWhy 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.

[phone]