Senior Thermal Engineer I
CesiumAstro
Job Description
Job Description
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.
JOB REQUIREMENTS AND MINIMUM QUALIFICATIONS- 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.).
CesiumAstro considers several factors when extending an offer, including but not limited to, the role and associated responsibilities, a candidate’s work experience, education/training, and key skills. Full-time employment offers include company stock options and a generous benefits package including health, dental, vision, HSA, FSA, life, disability and retirement plans.
CesiumAstro is an Equal Opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability, protected Veteran Status, or any other characteristic protected by applicable federal, state, or local law.
Please note: CesiumAstro does not accept unsolicited resumes from contract agencies or search firms. Any unsolicited resumes submitted to our website or to CesiumAstro team members will be considered property of CesiumAstro, and we will not be obligated to pay any referral fees.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
- ...people. Our team is our competitive advantage and we are better together.YOUR MISSIONTrue Anomaly is looking for a creative Thermal Engineer at the Senior or Staff level to develop new spacecraft. In this role you will be work with a multi-disciplinary product team to...SeniorPermanent employment
$135k - $170k
...Senior Thermal Engineer Greater Seattle Area, Greater Denver Area At Gravitics, we're not exploring space—we're building it. We're creating the infrastructure for a thriving space economy, enabling humanity to flourish beyond Earth. Our vision is bold, but we're...SeniorPermanent employmentContract work$144.18k - $219.52k
...Vehicles. In this position you will be responsible for passive thermal control components and systems for the MK1 Lunar Lander from... ...Qualifications ~ B.S. degree in mechanical or aerospace engineering or equivalent on-the-job experience in the spacecraft design industry...SeniorPermanent employmentFull timeTemporary workLocal area- ...Description Job Description At Karman+, we’re building spacecraft systems that will take us beyond Earth orbit. As a Senior Thermal Fluids Engineer, your role would be to drive development of critical systems for a deep space vehicle like propellant tanks, valves,...Senior
- Lunar Outpost is seeking a Senior Systems Engineer - Thermal to help define the future of lunar surface mobility. You will work on the Pegasus LTV program and collaborate across Thermal, Mechanical, and Systems teams to ensure design closure and rigorous verification in...Senior
$104k - $140k
Senior Mechanical HVAC Engineer ABOUT USMatrix Technologies, Inc. has been a leading provider of engineering, automation, and systems integration services since 1980. Guided by 'The Matrix Way,' we value teamwork, collaboration, and fun. Recognized as a Top Workplace, we...SeniorFull timeTemporary workFor contractorsCasual workWork at officeLocal areaImmediate startWork from homeFlexible hours$140k - $170k
DMA Engineering, Inc. is seeking an Associate Principal Engineer to manage diverse projects and enhance engineering processes. This role offers the chance to shape strategy and execution while working in a hybrid setting in Colorado. Candidates should possess strong mechanical...Senior$114.6k - $234.6k
...Job Description We are seeking a skilled engineer or scientist to lead the deployment and management of direct-to-chip liquid cooling... ...supplier collaboration, and support the innovation of advanced thermal management solutions. Responsibilities Key...Temporary workFlexible hours$65 - $72 per hour
...We are seeking a highly motivated Thermal Engineer to support the design, analysis, development, integration, and testing of spacecraft and space-based systems. The ideal candidate will apply thermal engineering principles to ensure mission success across all phases of...Contract workTemporary work$95k - $140k
...operational systems. Our work spans hardware, software, and systems engineering, and we're always looking for people who want to build... ...that matter. The Role We are looking for a Mid to Senior Level Thermal Engineer to fully own the design and analysis of thermal...Permanent employmentFull timeTemporary work$142.71k - $215.44k
Sargent & Lundy is seeking an experienced engineering consultant in Westminster, Colorado, to join our Electrical Analytical Division. This hybrid position focuses on power system protection, relay settings, and NERC compliance, requiring 10+ years of relevant experience...Senior$125k - $165k
...Thermal Engineer - Own the thermal architecture behind next-generation spacecraft from design through on-orbit operation Denver, Colorado | On-site Opportunity Summary This role will own the thermal architecture and thermal-control strategy for advanced spacecraft...Temporary work$142.71k - $215.44k
Sargent & Lundy is seeking an Electrical Engineer specializing in time domain analysis to join their team in Westminster, Colorado. This hybrid role requires a Bachelor's degree in Electrical Engineering, with a Master’s or PhD preferred, and over 10 years of experience...Senior$142.71k - $215.44k
Sargent Lundy is seeking a highly skilled Electrical Analytical Engineering Consultant specializing in EMT analysis of power systems. This hybrid role involves performing complex calculations like TOV and TRV. Ideal candidates should possess a Bachelor's Degree in Electrical...Senior- ...Senior Process Engineer The Senior Process Engineer will play a key role in developing, testing, and optimizing DISA's innovative HPSA technology for minerals processing, tailings remediation, and resource recovery. This role involves heavy lab work supporting the future...Senior
$90k - $128k
...Senior Electrical Engineer – Power Systems & Distribution ABOUT US Matrix Technologies, Inc. has been a leading provider of engineering, automation, and systems integration services since 1980. Guided by 'The Matrix Way,' we value teamwork, collaboration, and fun....SeniorFull timeTemporary workFor contractorsCasual workLocal areaImmediate startWork from homeFlexible hoursNight shift$160k - $200k
...Infleqtion is seeking a highly experienced thermal analyst; this role is responsible for... ...internal management, researchers, systems engineers, aerospace experts, manufacturing... ...~ Presenting progress and results to senior management and the end customer ~ Execution...Full timeTemporary workFor subcontractorWork at officeFlexible hours- Sargent Lundy is looking for a Senior Electrical Analytical Engineer in Westminster, Colorado. This role allows for a hybrid work arrangement, involving both on-site and remote work. The successful candidate will have significant expertise in Electromagnetic Transient (...SeniorRemote work
$140k - $160k
...Senior Manufacturing Engineer Crusoe is on a mission to accelerate the abundance of energy and intelligence. As the only vertically integrated AI infrastructure company built from the ground up, we own and operate each layer of the stack — from electrons to tokens —...SeniorTemporary workWork at office$65 - $72 per hour
...Job Description Job Description Job Title: Thermal Engineer Job Description We are seeking an experienced Thermal Engineer to lead thermal design and analysis efforts. This role involves performing thermal analyses on spacecraft and satellites, utilizing advanced...Contract workTemporary work$110k - $160k
...take informed risks, and evolve to achieve our goals. We compare with the best version of ourselves What is the role? As a Thermal Engineer, you will be responsible for the thermal engineering activities related to spacecraft design, manufacturing, testing, launch,...Work at officeFlexible hours- ...individuals to join our team. We are looking to add a Senior Power Electronics Engineer II to our team. If you enjoy working in a startup... ...applications, including part derating, worst-case analysis, and thermal constraints. Excellent written and verbal...SeniorPermanent employmentFull timeContract workWork experience placementLocal area
$100.02k - $152.81k
...on site at the Sargent & Lundy office and working remote from home. We are seeking a highly skilled and experienced Senior Electrical Analytical Engineer specializing in Electromagnetic Transient (EMT) analysis of power systems. The ideal candidate will have a strong...SeniorHourly payWork at officeLocal areaRemote workWork from homeFlexible hours$132.96k - $226.04k
...supports the mechanical design of optical instruments and laser systems in space and tactical environments. As a mechanical design engineer, you’ll work in cross-disciplined teams of various sizes to deliver the solutions our customers rely on. The opportunities for...SeniorFull timeWork at officeLocal areaRemote work- ...Senior Director, Principal Gifts About the Company Philanthropic organization supporting Indigenous culture & individuals Industry Non-Profit Organization Management Type Non Profit Founded 2017 Employees 11-50 Categories ~ Non-Profit &...Senior
- ...Tri-State Generation and Transmission Association is seeking a Senior Paralegal to support the General Counsel and Deputy General Counsels. The role involves advanced regulatory work, real estate title review, and complex corporate filings across FERC and state commissions...SeniorRemote workFlexible hours
- ...is a key player in the country’s transition to renewables.Burns & McDonnell is searching for well-rounded and driven senior level Electrical Engineers with a focus on Energy Storage. This unique opportunity requires an individual who enjoys engineering, business development...SeniorWork experience placementWork at officeOverseas
- ...passionate about the work you do and want to keep growing in your career, we want to talk to you!Our Federal group is looking for a Senior Process Engineer to support our growing work in DOE and DOD production and nuclear facilities. The successful candidate will:Have experience...Senior
$107k - $127k
...CesiumAstro in Westminster, Colorado is seeking a Senior Technical Recruiter to lead recruitment for aerospace engineering roles. The ideal candidate will have over 6 years of experience in technical recruiting within the aerospace or defense industry. This role focuses...Senior$111k - $184k
Schweitzer Engineering Laboratories (SEL) is focused on making electric power safer, more reliable, and more economical. SEL manufactures... ....Pay Range DataWe anticipate filling this position as a Senior Engineer - Automation:Senior Engineer - Automation: $111,000.0...SeniorFull timeApprenticeshipRemote workWork from homeWorldwideFlexible hours
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Senior Thermal Engineer I. Be the first to apply!
- senior application security Westminster, CO
- senior cloud data engineer Westminster, CO
- senior Westminster, CO
- senior customer success engineer Westminster, CO
- senior property accountant Westminster, CO
- senior operations technician Westminster, CO
- senior robotics software engineer Westminster, CO
- senior database analyst Westminster, CO
- senior windows systems engineer Westminster, CO
- senior construction accountant Westminster, CO



