Cleanroom Coordinator

Location: Sassenheim

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

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

Profile

Proven experience as an 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 trust and 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

Benefits

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

A competitive salary with an annual bonus based on individual and company performance

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

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

Company bicycle and fitness plans

A personal development budget

About Cosine
cosine transforms high‑stakes measurement challenges into scalable, real‑world solutions. What sets cosine apart is its integrated approach, linking insight, science, and engineering to deliver solutions that work in the real world, enable science and make an impact for humanity. Backed by over 25 years of heritage, expertise and deep systems thinking, cosine guides partners from defining the real need to deploying reliable, precision‑built technologies that enable progress across space and planet.

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.

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