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Posted 3 mo agoFirst seen 24 d ago
Principal Mechanical Engineer I
Posted by CesiumAstro on 21 July 2026, 105 days ago. Still on their Lever board when we checked 20 min ago. Half of CesiumAstro's roles come down within 48 days.
What the posting is about
Design mechanical systems for satellites, spacecraft, and aerospace platforms. Collaborate cross-functionally in a startup environment. Mentor junior engineers and present design reviews to customers and executives.
Read out of the posting
LevelNot stated
Experience asked5+ years
EmploymentFull time
LocationCambridge, United Kingdom
RemoteNot stated
Visa sponsorshipNot stated
SalaryNot published, and most postings do not
Posted2026-07-21
Found vialever, direct from their system
We saw it 3 months after it went up.
The posting, as the company wrote it
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 Principal Mechanical Design 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 mechanical design of Cesium products through all phases of the development process. The ideal candidate will have extensive experience in electronics packaging design, mechanical simulations and analyses, computer-aided design (CAD), spacecraft mechanical interfaces, and environmental qualification of electronic assemblies.
As a principal mechanical team member, you will be responsible for mechanical designs from initial concept design through requirements definition, detailed design, simulation, analysis, manufacturing, testing, qualification, and in-orbit support of Cesium's products. Required skills and experience include thermal management design, precision machining principles, thermal simulation and analysis, shock and vibration simulation and analysis, electromagnetic interference/compatibility (EMI/EMC) mitigation techniques, geometric dimensioning and tolerancing (GD&T), finite element analysis (FEA), and cost analysis to develop, validate, and optimize mechanical designs. Principal engineers also serve as technical and professional mentors in their field, helping to cultivate and develop junior engineers on the team.
The successful candidate will also present engineering design review materials to our customers and executive team, as well as participate in proposal-writing efforts. As such, excellent written and verbal communication skills are required.
Copied from CesiumAstro’s own board, not rewritten.
Also open at CesiumAstro
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