Cleanroom Coordinator

Location: Sassenheim

Your (space) mission
As the Cleanroom Coordinator at cosine you are the central point of contact and hands‑on coordinator for all cleanroom activities. You work closely with scientist‑engineers, lab technicians, contractors and support teams to ensure a well-organized, safe and contamination-controlled environment.

At cosine, our clean rooms are where precision meets space. Here, we build and test advanced optical instruments for ESA missions such as New Athena and future space exploration programs.

You safeguard cleanroom integrity by ensuring compliance with procedures, safety standards and quality requirements, while actively supporting daily operations on the floor. You bring structure, alignment and clarity, enabling teams to focus on delivering high-end space hardware.

You are present, approachable and proactive. You coordinate, support and guide rather than delegate, and help create a collaborative environment where people take ownership and perform at their best.

Tasks & responsibilities
In this role you will:

Coordinate and support daily cleanroom operations across teams and activities

Ensure staff and contractors comply with cleanroom entry procedures and working standards

Act as the primary point of contact for all cleanroom users (internal and external)

Safeguard compliance with project requirements, internal procedures, and contamination control standards

Monitor workflows, workload balance and execution quality to maintain consistency

Support and coach lab technicians in their day‑to‑day work

Drive continuous improvement in cleanroom organization, usage and coordination

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

Proven experience as a engineer or technician in cleanroom environments, ideally in the semiconductor or space industry

Bachelor's degree (HBO) in a technical study or compensated by sufficient relevant experience

Solid knowledge of contamination control and cleanroom standards

Experience working with external contractors in a clear and constructive manner

Strong communication skills, with the ability to build trustand alignment across diverse teams and cultures

Fluent in English and Dutch, both written and spoken

Structured, proactive and comfortable combining coordination with hands‑on involvement

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

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

Annual bonus based on personal and company performance

Hybrid working options, including the possibility to work partially from home

Company bicycle- and fitness plan

A personal development budget

Initial 1-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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