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AST SpaceMobile

Senior Analyst Engineer - Thermal

Barcelona, Spain
Level
Senior

Not stated in the posting: salary, work type, visa.

Open. First seen 21 October 2026.

About the role

AST SpaceMobile's standard text

AST SpaceMobile is building the first and only global cellular broadband network in space to operate directly with standard, unmodified mobile devices based on our extensive IP and patent portfolio and designed for both commercial and government applications. Our engineers and space scientists are on a mission to eliminate the connectivity gaps faced by today’s five billion mobile subscribers and finally bring broadband to the billions who remain unconnected.

Position Overview

We are seeking a talented Senior Analyst Engineer to work in our satellite mechanical subsystem & payload team, with a focus on thermal analysis and on the reliability of electronic components (EEE parts), and a background in mechanical analysis, contributing to the design, analysis, specification, testing and validation of spacecraft hardware.

The successful candidate will be innovative, creative, and challenge the status quo. He or she will work well in teams while also having the ability to lead analysis activities and to work assignments autonomously.

Key Responsibilities:

· Lead the thermal analysis of satellite subsystems and payload: build and maintain thermal mathematical models, and perform steady-state and transient analyses for orbital and test environments.
· Perform reliability analysis of electronic components: component rating and derating margin calculations according to ECSS standards (e.g. ECSS-Q-ST-30-11), using thermal analysis results for junction/case temperatures, and reliability predictions as required.
· Support thermal design and engineering trade-offs, defining thermal requirements, interfaces, materials and thermal control solutions together with the mechanical and electrical teams.
· Support thermal vacuum (TVAC) testing: test definition, predictions, and correlation of thermal models with test results.
· Perform structural and thermo-elastic analyses (static, modal, random vibration, shock, thermal distortion/stress) to support mechanical design decisions.
· Prepare and maintain analysis reports and documentation demonstrating compliance with requirements, and technical support to AIT activities.

Qualifications

Education:

· Bachelor's degree in Mechanical, Aerospace or related technical field.
· Higher degree is preferred.

Experience:

· At least 5 years of hands-on experience in thermal analysis of spacecraft subsystems and payload and/or other equivalent applications.

Preferred Qualifications:

· Demonstrated experience with thermal analysis tools (e.g. Ansys Workbench, Thermal Desktop, ESATAN-TMS or equivalent).
· Demonstrated experience in reliability of electronic (EEE) components, including rating and derating margin calculations according to ECSS standards (e.g. ECSS-Q-ST-30-11 and related dependability standards).
· Knowledge of failure analysis methods (FMECA/FMEA), reliability prediction and EEE parts selection for space applications.
· Background in mechanical analysis (FEM) using standard tools (e.g. Ansys Workbench, Patran, Hypermesh, Nastran, Abaqus) and classical structural analysis methods.
· Knowledge of thermal control hardware and thermal testing.

Soft Skills:

· Demonstrated ability to work in a multidisciplinary team with other engineers.
· Flexibility/adaptability in a fast-paced & dynamic environment.
· Fluent English written and verbal communication skills.

Technology Stack:

· Ansys Workbench.
· Thermal Desktop.
· ESATAN-TMS.
· FEM analysis tools.
· Patran.
· Hypermesh.
· Nastran.
· Abaqus.

Physical Requirements

· Ability to work in a standard office environment and use a computer for extended periods.
· Ability to work on-site at the Barcelona office.

AST SpaceMobile's standard text

This job description may not be inclusive to the duties and responsibilities listed. Additional tasks may be assigned to the employee from time to time or the scope of the job may change as needed by business demands.

AST SpaceMobile is an Equal Opportunity, at will Employer; employment is governed on the basis of merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.

What this role asks for

Particular to this role

ANSYS

Rare in AST SpaceMobile's other 185 open postings.

72% of this description is written for the role. The rest is AST SpaceMobile's standard text, folded away below.

Compared with AST SpaceMobile's other open jobs.

The team: Mechanical Engineering HIRES STEADILY

This role is one of 11 open in Mechanical Engineering. 2 were posted in the last 30 days and the oldest in November: a team that hires all year rather than one being built.

WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS

Creo (7 of 11), SolidWorks (6 of 11), Excel (5 of 11), CATIA (4 of 11), FEA (4 of 11), GD&T (2 of 11), LabVIEW (2 of 11)

OTHER ROLES ON THIS TEAM

From the team and dates on AST SpaceMobile's own job board.

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