USD 113000–136000/yr

Senior Thermal Engineer I

United StatesUnited States·WestminsterFull-timesenior
OtherThermal Engineer
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Overview

Please Note: To conform with the United States Government Space Technology Export Regulations, the applicant must be a U.S. citizen, lawful permanent resident of the U.S., conditional resident,

Technical Tools
OtherThermal Engineer
Please Note: To conform with the United States Government Space Technology Export Regulations, the applicant must be a U.S. citizen, lawful permanent resident of the U.S., conditional resident, asylee or refugee (protected individuals as defined by 8 U.S.C. 1324b(a)(3)), or eligible to obtain the required authorizations from the U.S. Department of State.

At CesiumAstro, we are developers and pioneers of out-of-the-box communication systems for satellites, UAVs, launch vehicles, and other space and airborne platforms. We take pride in our dynamic and cross-functional work environment, which allows us to learn, develop, and engage across our organization. If you are looking for hands-on, interactive, and autonomous work, CesiumAstro is the place for you. We are actively seeking passionate, collaborative, energetic, and forward-thinking individuals to join our team.

We are looking to add a Senior Thermal Engineer I to our team. If you enjoy working in a startup environment and are passionate about developing leading-edge hardware for satellites, spacecraft, and aerospace systems, we would like to hear from you. 
 
In this position, you will be responsible for the design, analysis, and validation of thermal control systems for Cesium’s next-generation products. The ideal candidate will combine extensive experience in developing and analyzing thermal management systems for spacecraft, satellite electronics, and airborne systems with deep knowledge in space and aerospace thermal environments. 
 
As a senior member of a cross-functional team, you will be responsible for thermal designs from initial concept design through requirements definition, detailed design, simulation/analysis, manufacturing, testing, qualification of Cesium’s products. You will work closely with other electrical and mechanical engineers on an integrated team to develop highly optimized solutions. 
 
The successful candidate will also present engineering design review materials to customers and upper management, as well as participate in proposal-writing efforts. As such, excellent written and verbal communication skills are required. 
  • A Bachelor of Science (BS) or higher in Mechanical, Thermal, or Aerospace Engineering from an accredited university or institution. 
  • 4 years of industry experience in thermal/mechanical design and analysis utilizing a mixture of numerical and analytical techniques. A Master of Science may count as 2 years of experience. 
  • Expertise in electronics/PCBA, box, and system-level thermal design and analysis. 
  • Strong proficiency in professional simulation tools such as ANSYS (preferred) or Thermal Desktop, as well as MCAD tools such as SolidWorks (preferred). 
  • Strong mechanical engineering and heat transfer foundation. 
  • Experience designing and analyzing radiative, conductive and convective heat transfer for various applications.
  • Experience building thermal resistance networks and reduced order thermal models for complex thermal systems. 
  • Experience correlating thermal models with thermal chamber or TVAC test results. 
  • Experience developing analysis automation tools (spreadsheet or script-based). 
  • Familiarity with common manufacturing processes for thermal control systems. 
  • Familiarity with the development of thermal control systems and fixtures for lab environments. 
  • Expertise in thermal management of phased array and/or high-power RF electronics. 
  • Experience in thermal analysis of electronics at the die, lead-frame, and package level. 
  • Proficiency with computational scripting languages (Matlab, Python, Mathematica, etc.). 
  • Location & Eligibility

    Where is the job
    Westminster, United States
    On-site at the office
    Who can apply
    US
    Listed under
    United States

    Listing Details

    Posted
    March 30, 2026
    First seen
    March 30, 2026
    Last seen
    April 28, 2026

    Posting Health

    Days active
    28
    Repost count
    0
    Trust Level
    42%
    Scored at
    April 28, 2026

    Signal breakdown

    freshnesssource trustcontent trustemployer trust
    Cesiumastro
    Employees
    350
    Founded
    2017
    View company profile
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    CesiumastroSenior Thermal Engineer IUSD 113000–136000