Principal Mechanical Engineer
$145,000–$170,000 year
On-site · Burlington, Massachusetts, United States
Job Summary
Principal Mechanical Engineer to provide technical leadership and architectural ownership across our advanced detection and imaging systems. Serve as mechanical system architect for major product platforms, lead system-level design decisions, trade studies, and risk mitigation, and establish mechanical standards and reusable architectures. Drive cross-functional alignment with mechanical, electrical, software, and physics teams; lead development of complex electromechanical systems including structures, mechanisms, and enclosures; drive early-stage innovation with proof-of-concept prototypes to reduce risk. Own mechanical execution across the full product lifecycle from concept through sustaining; resolve high-impact cross-subsystem challenges; oversee tolerance analysis, structural integrity, environmental robustness, and reliability. Partner with Operations to ensure manufacturable, scalable, and cost-effective designs; lead mechanical NPI, production readiness, and supplier engagement; incorporate production, quality, and field feedback into continuous improvement; mentor engineers and lead technical design reviews; influence roadmaps and long-term technical strategy; travel as needed to suppliers, manufacturing partners, field deployments, or customer sites. Location: Burlington, MA; Work Authorization: US, full-time; relocation not offered.
Required Qualifications
- Bachelor’s or Master’s degree in Mechanical Engineering
- 10+ years of mechanical engineering experience in complex product development
- Proven technical lead or system owner on shipped products
- Experience designing electromechanical systems such as handheld devices, large-scale industrial or vehicle-mounted equipment, or precision mechanisms
- Strong knowledge of manufacturing processes including injection-molded plastics, structural metals, welded assemblies, and tolerance management
- Advanced proficiency with SolidWorks or Onshape; working knowledge of FEA and mechanical simulation
- Excellent communication and cross-functional collaboration skills
- Demonstrated ownership of designs from concept through full-rate production
- Experience with ruggedized, safety-critical, or harsh-environment products; collaboration with Physics or Imaging teams preferred
- Passion for mission-driven engineering and real-world impact
- Travel as needed to support development, integration, and issue resolution
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