Mechanical Engineer II (Thermal Analysis)

  • Lockheed Martin
  • Sunnyvale, California
  • Full Time
Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more we can innovate, invest, inspire and integrate our capabilities to transform the future.

At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. Were creating future-ready solutions, focusing on resiliency and urgency through our 21st Century Security vision. Were erasing boundaries and forming partnerships across industries and around the world. Were advancing spacecraft and the workforce to fuel the next generation. And were reimagining how space can connect us, ensuring security and prosperity.

Join us in shaping a new era in space and find a career that's built for you!

For over 60 years, the Fleet Ballistic Missile (FBM) team has supported the Navys mission to provide affordable and credible strategic defense. We offer unique career opportunities and challenges on a program with a rich history and exciting future. We help keep this nation and our allies secure. We are a community of engineers looking for an enthusiastic Mechanical Engineer to join the tight-knit group. The FBM Trident II D5 Life Extension 2 program (D5LE2) is ramping up to become one of Lockheed Martins premier Lines of Businesses that prioritizes partnership, integrity, and reliability. Become a member of a highly-skilled analysis team for missiles and spacecraft systems!

Lockheed Martin Space is seeking a Mechanical Engineer to join our Missile Flight Sciences team in Sunnyvale, CA! This position will have the exciting opportunity support the Aerothermal team, and the successful candidate will be responsible for the following:

Performing subsystem- and system-level thermal analysis for the FBM D5LE2 program
Support the modernization of legacy thermal environments to inform missile hardware design
Support post-test analysis for various test projects
Ownership of computational, physics-based modeling & simulations from start to finish (development, assessment, results & documentation)
Correlate model results to subsystem & system requirements and support design teams & risk mitigation
Work and interact with multiple engineering fields across multiple sites
Present key findings and results to internal and external customers & stakeholders
Provide recommendations to support peer and customer reviews
Provide documentation and recommendations to data packages to support key discussions, present analysis data to engineering teams, customer technical representatives, and Program Office personnel at technical interchange meetings and program milestone design reviews

You can learn more about Sunnyvale, CA by visiting this link.

Learn more about Lockheed Martins comprehensive benefits package. Prior work experience in one or more of the following topics: thermodynamics, heat transfer, aeroheating, material properties, or computer programming
Experience analyzing thermal systems and/or subsystems
Understanding of correlating between applied operating environments & thermal responses
Experience with any commercial thermal analysis tools (e.g., Thermal Desktop, SINDA, TSS, NX Thermal)
Strong mathematical, analytic, and data processing skills
Willingness/ability to obtain and maintain a Top Secret clearance; US citizenship is required Experience with NX Thermal
Knowledge or experience with testing & instrumentation including test procedure development, instrumentation definition, test direction, and post-test model correlation
Strong technical writing proficiency
Experience with modern collaboration tools, such as Jira and Confluence
Excellent communication skills, both written and verbal, including MS Office proficiency
Active or Current Top Secret clearance

#SpaceFlightScience
Job ID: 523517489
Originally Posted on: 6/3/2026

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