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Sierra Space

LEO space transportation, habitats, satellites

Mechanical Engineer 3 - Thermal Systems

Thermal & Fluids EngineeringConfirmed live in the last 24 hours
Full-time$110.7k - $152.2kIn-person

About the Job

Requirements

  • A bachelor's degree in a related field, or equivalent work experience in lieu of the degree, or a master's degree plus 3 years of experience.
  • Typically 5 or more years of related experience.
  • Expertise in mechanical engineering technical standards, principles, theories, concepts, and techniques, with general knowledge of related disciplines on aerospace platforms in space.
  • Experience managing discrete technical packages as a Responsible Engineer.
  • Ability to provide guidance to entry-level engineers.
  • Ability to develop imaginative, thorough, practical solutions to wide-ranging technical problems consistent with organizational objectives.
  • Ability to work under general direction to independently determine and develop approaches to solutions.
  • Ability to obtain and maintain a U.S. security clearance.

Responsibilities

  • Independently identify and resolve design goals and challenges under general direction.
  • Take design engineering ownership of small programs and discrete technical packages, potentially serving as a Responsible Engineer.
  • Collect and analyze data related to mechanical systems, propulsion, structures, structural analysis, or environmental systems and provide practical solutions to technical problems.
  • Prepare detailed technical documentation and reports to communicate findings and support project objectives.
  • Mentor and coach junior engineers in their technical and professional development.
  • Collaborate with cross-functional teams to achieve project goals and meet deadlines.
  • Communicate frequently with internal and external stakeholders to support project objectives and ensure quality products are delivered on time and within budget.

Desired Qualifications

  • Strong working knowledge of thermal design, analysis, and test methods, tools, and processes related to mechanical systems, propulsion, structures, and/or environmental systems.
  • Proficiency with thermal analysis tools such as Thermal Desktop.
  • Proficiency with engineering computer-aided design tools such as NX, SolidWorks, or similar, including advanced understanding of detail drawing standards and geometric dimensioning and tolerancing.
  • Experience with project management and the ability to manage multiple tasks simultaneously.
  • Working knowledge of manufacturing processes, materials science, and their impact on mechanical systems.
  • Experience with end-item testing and validation, including the ability to design and execute complex test plans.

About the Company

Sierra Space

LEO space transportation, habitats, satellites

Sierra Space provides a space-as-a-service platform spanning transportation, habitats, and satellite systems for government, civil, and commercial customers in the low-Earth orbit economy. Its products include the Dream Chaser reusable spaceplane for cargo and eventual crew, the LIFE inflatable habitat for LEO, lunar, or Mars missions, and satellite buses like Velocity, Horizon, and Titan used for missile warning and tracking under SDA contracts. Unlike many space firms, Sierra Space offers an end-to-end suite—spaceplane transport, habitable modules, and satellite platforms—integrated under one platform and backed by decades of spaceflight heritage, including collaboration on Orbital Reef with Blue Origin. Its goal is to enable a growing LEO economy by delivering integrated infrastructure and services that support government missions, commercial activity, and national security space capabilities.

Company size
1,001-5,000
Company stage
Series C
Total funding
$2.2B
Headquarters
Louisville, CO
Founded
2021

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