Mechanical Engineer III - Thermal Systems Verified today

Sierra Space · 2 Locations · Mechanical · first seen 2026-07-16

About the Role

You will work as a Mechanical Engineer III focusing on thermal systems for spacecraft and satellites. Operating under general direction, you will take design engineering ownership of discrete technical packages, often serving as a Responsible Engineer (RE).

Your responsibilities will include:

  • Independently identify and resolve thermal design goals and engineering challenges
  • Collect and analyze data related to mechanical systems, propulsion, structures, structural analysis, and environmental systems
  • Provide imaginative, thorough, and practical solutions to wide-ranging technical problems
  • Prepare detailed technical documentation and reports to communicate findings and support project objectives
  • Mentor and coach junior engineers on technical and professional development
  • Collaborate effectively within cross-functional teams to achieve project goals and meet deadlines
  • Communicate frequently with external and internal stakeholders to support project objectives and ensure quality delivery on time and within budget

About You

You will have a strong background in mechanical engineering with expertise in thermal systems applied to aerospace platforms. You are comfortable working independently under general direction and have experience managing discrete technical packages as a Responsible Engineer.

Minimum Qualifications

  • Bachelor's degree in a related field (or equivalent work experience, or Master's degree plus 3+ years experience)
  • 5+ years of related experience
  • Expertise in Mechanical Engineering technical standards, principles, theories, concepts, and techniques applied to aerospace platforms in space
  • Experience managing discrete technical packages as a Responsible Engineer (RE)
  • Ability to provide guidance to entry-level engineers
  • Ability to work under general direction to independently determine and develop approaches to solutions
  • Ability to obtain and maintain a U.S. Security Clearance

Preferred Qualifications

  • Strong working knowledge of thermal design, analysis, and test methods, tools, and processes related to mechanical systems, propulsion, structures, and environmental systems
  • Proficiency with thermal analysis tools such as Thermal Desktop
  • Proficiency with engineering CAD tools such as NX, SolidWorks, or similar, including advanced understanding of detail drawing standards and GD&T
  • Experience with project management and managing multiple tasks simultaneously
  • Strong problem-solving skills and attention to detail
  • Excellent communication and presentation skills
  • Ability to work independently and within a team
  • Demonstrated ability to meet deadlines and deliver high-quality results
  • Working knowledge of manufacturing processes, material sciences, and their impact on mechanical systems
  • Experience with end-item testing and validation, including design and execution of complex test plans

Compensation

Pay Range: $110,664.00 - $152,184.00

Your actual base compensation will be determined on a case-by-case basis and may vary based on job-related knowledge and skills, education, experience, internal equity and market competitiveness.

Benefits include medical, dental, and vision plans, 401(k) with 150% match up to 6%, life insurance, and 3 weeks paid time off.