Maintenance Engineer Space Technology

Location: Sassenheim

Your (space) mission
As the Maintenance Engineer Space Technology at cosine, you ensure the reliability of the advanced equipment that enables the development and production of cutting‑edge space instrumentation. You maintain a unique combination of cleanroom systems, precision manufacturing equipment, and highly specialized laboratory machinery that cannot simply be replaced off the shelf.

Tasks & Responsibilities
In this role you will:

Execute, optimize, and continuously improve preventive maintenance plans for cleanroom systems, laboratory equipment, and precision manufacturing machinery

Diagnose technical failures, identify root causes, and implement effective solutions to minimize downtime and maximize equipment reliability

Maintain and improve critical equipment that supports the development and production of advanced space instrumentation

Manage spare parts, maintenance materials, external suppliers, and maintenance records to ensure operational continuity

Ensure all maintenance activities comply with applicable safety standards and contribute to a safe and reliable working environment

Your profile
We are looking for candidates with the following qualifications:

MBO+ or HBO degree in Mechanical Engineering, Mechatronics, Industrial Automation, or a related technical discipline

Experience maintaining technical equipment in a production, laboratory, or other high‑tech environment

Experience working with maintenance or asset management systems

VCA‑VOL certification or an equivalent safety qualification

Certified for electrical work, or willing to obtain the required certification

Fluent in both Dutch and English, with the ability to communicate effectively across technical and operational teams

What We Offer
At cosine, we highly value our employees, and we will support your professional and personal development. We also provide our employees with:

A unique, international working environment at the intersection of physics and engineering

The opportunity to deliver end-to-end solutions in autonomous project teams, in close collaboration with customers

A competitive salary

27 days of annual leave (based on full-time employment)

Annual bonus based on personal and company performance

Company bicycle-and fitness plan

A personal development budget

Initial one-year contract, with the aim of long-term collaboration

About Cosine
Founded in 1998, cosine is a world-leading developer of space instrumentation and measurement systems, making the invisible measurable and the complex actionable. Its expertise spans High-Energy Optics, including optics developed for ESA's future New Athena X-ray observatory, as well as remote sensing solutions for Earth Observation and planetary science. With over 25 years of experience and advanced cleanroom and assembly facilities across the Netherlands, Germany, and Italy, cosine brings deep scientific and engineering expertise to some of the most demanding missions in space and on Earth.

What makes cosine a unique place to work is that your work goes end-to-end: from concept and design to building, testing, and delivering hardware that actually flies in space. You work in small, highly skilled teams where you have real ownership and impact, alongside experts in optics, physics, nanofabrication, and systems engineering. cosine is committed to providing an inclusive and equal opportunities work environment where everyone can thrive.

As a proud member of the Women in Aerospace community, we recognise the importance of diversity, inclusion, and equal opportunity in the workplace.

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