Environmental Test Engineer II

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 Cesium Astro
, 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, Cesium Astro 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 an Environmental Test Engineer II to our team. If you enjoy working in a startup environment and are passionate about developing leading‑edge hardware and software for satellites, spacecraft, and aerospace systems, we would like to hear from you.

In this position, you will be responsible for designing and executing environmental tests for our space and airborne products. These products are packaged electronic assemblies, ranging from component‑level single‑board computers and phased array antennas to payload‑level integrated communication systems. Environmental testing is critical to the company’s mission and includes thermal cycling, thermal vacuum, vibration, shock, and EMI/EMC testing.

Our Test Engineering team consists of highly technical engineers with broad expertise. Our Environmental Test Engineers are experts in the engineering fundamentals of environmental test as well as test design and execution.

The successful candidate will also present engineering design review materials to our customers and executive team and participate in proposal‑writing efforts. As such, excellent written and verbal communication skills are required.

• Authoring environmental test plans and procedures for development, qualification, and acceptance test campaigns.
• Interpreting environmental test standards, such as the NASA General Environmental Verification Standard (GEVS), and design test plans accordingly.
• Designing test fixtures such as mounting brackets and signal feedthroughs.
• Analyzing test fixtures for performance, such as thermal simulation and modal analysis.
• Selecting and maintaining environmental test equipment, such as thermal chambers, thermal vacuum chambers, vibration tables, and pyroshock simulation systems.
• Executing environmental test plans.
• Reviewing, interpreting, and approving environmental test data and results.
• Contributing and participating in root cause analysis, anomaly investigations, and failure review boards, where necessary.
• Authoring customer‑facing test reports.
• Working hand‑in‑hand with electronics engineers and mechanical engineers to understand company products and design tests accordingly.

• A Bachelor of Science (BS) or Master of Science (MS) degree in Mechanical Engineering, Aerospace Engineering, or a related technical discipline from an accredited university.
• 2 years of relevant industry or research experience covering several of the responsibilities listed.
• Working knowledge of environmental test for the aerospace industry.
• Excellent written and spoken communication skills.
• Excellent organizational and time management skills.

• Space industry experience.
• Familiarity with aerospace environmental test standards including, but not limited to, GSFC-STD-7000B, SMC-S-016, DO-160G, etc.
• Software proficiency, such as Python.
• Experience with common test fixture manufacturing processes (CNC, etc.).
• Familiarity with GD&T.

Cesium Astro 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.

Cesium Astro 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.

90000 - 105000 USD a year