Demo

Mechanical Engineer, Thermal Design

General Atomics
General Atomics Salary
Acton, MA Full Time
POSTED ON 8/30/2026
AVAILABLE BEFORE 10/14/2026
Job Summary

General Atomics Electromagnetic Systems (GA-EMS) designs and manufactures first-of-a-kind electromagnetic and electric power generation systems. GA-EMS’ expanding portfolio of specialized products and integrated system solutions support critical fleet, space systems and satellites, missile defense, power and energy, and process and monitoring applications for defense, industrial, and commercial customers worldwide.

We have an exciting opportunity in Acton, MA for a Mechanical Engineer with a focus on thermal design for optical space payloads. The ideal candidate has a strong background in heat transfer and thermal engineering and their application to space systems, direct experience in the thermal design and analysis of spacecraft or space payloads, and hands-on experience with the assembly, integration, and test (AI&T) of hardware. This role is well suited for an engineer with approximately 2–5 years of experience who is ready to take on increasing technical responsibility while working closely with experienced senior engineers.

The successful applicant will work as part of a multi-disciplinary team to develop, analyze, and test thermal control solutions for optical payloads and satellite systems. You will collaborate with mechanical, systems, optical, electrical, manufacturing, and test engineers, learn and apply best practices for thermal control of space systems, and progressively assume responsibility for key portions of payload and spacecraft thermal subsystems.

Duties & Responsibilities

  • Contribute to the design and development of thermal management solutions for optical space payloads, payload components, payload subassemblies, and orbital satellite systems.
  • Perform thermal analysis, modeling, and simulation (e.g., using SINDA/FLUINT and Thermal Desktop) to support design trades, requirements verification, and performance assessments.
  • Support and increasingly lead elements of the assembly, integration, and test (AI&T) process for payload thermal hardware, including procedure development, test setup, execution support, and data analysis.
  • Participate in the development and review of thermal subsystem requirements, allocations, design documentation, integration plans, and test procedures.
  • Support environmental test campaigns (e.g., thermal vacuum, thermal cycling), including planning, test readiness and execution, and correlation of models to test results.
  • Prepare technical documentation, including analysis reports, design review materials, and test reports, for internal meetings and program milestone reviews.
  • Maintain the strict confidentiality of sensitive information.


We recognize and appreciate the value and contributions of individuals with diverse backgrounds and experiences and welcome all qualified individuals to apply.

Job Qualifications

  • Typically requires a bachelors degree, masters degree or PhD in engineering or a related technical discipline from an accredited institution and progressive engineering experience as follows; four or more years of experience with a bachelors degree or two or more years of experience with a masters degree. May substitute equivalent engineering experience in lieu of education.
  • Experience with thermal analysis tools such as SINDA/FLUINT and Thermal Desktop is highly desirable; experience with other thermal or finite element tools is a plus.
  • Experience with the thermal design and analysis of space payloads, or other complex electro-mechanical systems; direct EO/IR space payload experience is a plus.
  • Hands-on experience with the assembly, integration, and test (AI&T) of hardware, preferably including thermal control hardware (e.g., radiators, thermal straps, heaters, MLI, thermal interfaces).
  • Familiarity with CAD tools (e.g., SOLIDWORKS, CREO, or NX) and basic scripting/programming (e.g., Python, MATLAB, or FORTRAN)
  • Exposure to thermal vacuum (TVAC), thermal cycling, or other environmental test programs, including test planning and data analysis; experience correlating thermal models to test data is a plus.
  • Demonstrated ability to apply engineering principles and perform thermal calculations, including hand calculations to support and cross-check numerical models.
  • Strong written and verbal communication skills, including the ability to clearly present technical information to audiences with varying technical backgrounds.
  • Ability to organize and prioritize tasks, work effectively in a team environment, and meet established deadlines or milestones.
  • Must be able to obtain and maintain a DoD Security Clearance. U.S. citizenship is required.


Job Type: Full-Time Salary

Salary range: 81,080 - 141,650

Salary.com Estimation for Mechanical Engineer, Thermal Design in Acton, MA
$128,074 to $155,784
If your compensation planning software is too rigid to deploy winning incentive strategies, it’s time to find an adaptable solution. Compensation Planning
Enhance your organization's compensation strategy with salary data sets that HR and team managers can use to pay your staff right. Surveys & Data Sets

What is the career path for a Mechanical Engineer, Thermal Design?

Sign up to receive alerts about other jobs on the Mechanical Engineer, Thermal Design career path by checking the boxes next to the positions that interest you.
Income Estimation: 
$74,551 - $88,300
Income Estimation: 
$85,954 - $106,408
Income Estimation: 
$91,017 - $111,627
Income Estimation: 
$106,299 - $135,354
Income Estimation: 
$134,236 - $174,128
Income Estimation: 
$132,162 - $161,329
Employees: Get a Salary Increase
View Core, Job Family, and Industry Job Skills and Competency Data for more than 15,000 Job Titles Skills Library

Job openings at General Atomics

  • General Atomics Acton, MA
  • Job Summary General Atomics (GA), and its affiliated companies, is one of the world’s leading resources for high-technology systems development ranging fro... more
  • 9 Days Ago

  • General Atomics Fort Bragg, NC
  • General Atomics Systems Integration, LLC (GA-SI), an affiliate of General Atomics, is a provider of military and commercial engineering services. GA-SI is ... more
  • 9 Days Ago

  • General Atomics Salina, KS
  • General Atomics Aeronautical Systems, Inc. (GA-ASI), an affiliate of General Atomics, is a world leader in proven, reliable remotely piloted aircraft and t... more
  • 10 Days Ago

  • General Atomics Fort Riley, KS
  • General Atomics Systems Integration, LLC (GA-SI), an affiliate of General Atomics, is a provider of military and commercial engineering services. GA-SI is ... more
  • 10 Days Ago


Not the job you're looking for? Here are some other Mechanical Engineer, Thermal Design jobs in the Acton, MA area that may be a better fit.

  • JETCOOL Technologies Inc. Littleton, MA
  • Job Posting Start Date 05-06-2026 Job Posting End Date At JetCool, a Flex company, we’re at the forefront of liquid cooling innovation, delivering advanced... more
  • 1 Day Ago

  • Boyd Thermal by Eaton Billerica, MA
  • Job Description Job Summary The Boyd Quality Engineer is responsible for ensuring that Boyd products exceed the requirements and expectations of our custom... more
  • 27 Days Ago

AI Assistant is available now!

Feel free to start your new journey!