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Lead, Thermal Mechanical Engineer; Space Systems

Job in Wilmington, Middlesex County, Massachusetts, 01887, USA
Listing for: L3Harris Technologies
Full Time, Seasonal/Temporary position
Listed on 2026-01-12
Job specializations:
  • Engineering
    Systems Engineer, Mechanical Engineer
Salary/Wage Range or Industry Benchmark: 150000 - 200000 USD Yearly USD 150000.00 200000.00 YEAR
Job Description & How to Apply Below
Position: Lead, Thermal Mechanical Engineer (Space Systems)

Overview

Lead, Thermal Mechanical Engineer (Space Systems) with L3

Harris Technologies. Role focuses on thermal design, analysis, and test of optical systems operating in harsh space and ground environments. The candidate will lead multidisciplinary teams, mentor junior engineers, and interface with customers and suppliers.

Responsibilities
  • System level thermal design & development, payload level integration and test, and risk mitigation for space-based environments
  • Perform thermal design and analysis on complex mechanical hardware (precision mechanisms, electro-mechanical devices, spacecraft mechanism design, electronics packaging, deployable mechanisms, avionics, ground-based systems)
  • Create and analyze design concepts using thermal analysis software and FEA
  • Define and establish the technical approach to meet objectives
  • Direct, coordinate, and assist engineering teams to meet objectives
  • Support requirements derivation and verification, system architecture development, loads derivation, trade studies, design sensitivity/optimization, and documentation; lead system test activities
  • Organize thermal design and analysis as an IPT lead; interface with customer technical leads and management
  • Prepare reports and presentation materials summarizing analysis results for external and internal groups, including leadership and customers
  • Participate in and present at Preliminary Design Reviews (PDR), Critical Design Reviews (CDR), and Technical Interchange Meetings (TIM)
  • Interface with outside suppliers/customers and other engineering disciplines to drive designs to closure
  • Present design details at program reviews to customers and independent reviewers
  • Develop thermal test plans to manufacture and test payload sensor systems
  • Support new business opportunities
  • Mentor junior engineers
Qualifications
  • Bachelor’s Degree in Mechanical Engineering or related field; minimum 9 years of relevant experience. Graduate degree with 7 years of related experience; in lieu of a degree, 13 years of related experience
  • 7+ years of professional experience using thermal analysis tools (Thermal Desktop preferred, Sinda, Flotherm, Icepak, etc.)
  • 4+ years of technical leadership to a multi-disciplinary mechanical engineering team through requirements, design, analysis, test, hardware build, delivery and launch
  • Professional experience with thermal analysis of mechanical and electronic systems in space, air, or ground environments
  • Professional experience with thermal vacuum testing
  • Ability to obtain and maintain a U.S. TS/SCI Security Clearance
Preferred Additional Skills
  • Experience with finite element analysis software
  • Ability to support design decisions with well-documented engineering analyses
  • Ability to analyze problems and identify root causes quickly
  • Experience leading engineering teams from conceptual to detailed design
  • Experience as a lead engineer, project engineer, or IPT lead is a plus
  • Experience with Microsoft Office tools
  • Active TS/SCI clearance

Salary range disclosure:
In compliance with pay transparency requirements, the salary range for this role in California, Massachusetts, New Jersey, Washington, and the Greater DC, Denver, or NYC areas is $ - $. This is not a guarantee of compensation; final offer amount may vary based on experience and location.

L3

Harris also offers benefits including health and disability insurance, 401(k) match, flexible spending accounts, EAP, education assistance, parental leave, paid time off, and company-paid holidays. Programs vary by date of hire, schedule type, and collective bargaining agreements.

Equal Opportunity

Employer:

L3

Harris Technologies is proud to be an Equal Opportunity Employer. We are committed to a workplace free from unlawful discrimination. All applicants will be considered without regard to race, color, religion, age, national origin, ethnicity, gender, gender identity or expression, sexual orientation, marital status, veteran status, disability, or genetic information. E-Verify participation is used; see the E-Verify Poster for details. Some positions may require the ability to obtain a security clearance;

security clearances may be restricted to U.S. citizens.

By submitting your resume, you authorize L3

Harris Technologies to share your resume and related information with its subsidiaries and affiliates for consideration of other positions.

Job metadata
  • Seniority level:
    Mid-Senior level
  • Employment type:

    Full-time
  • Job function:
    Engineering and Information Technology
  • Industries:
    Defense and Space Manufacturing
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