As the Cleanroom Coordinator at cosine you are the central point of contact and hands-on coordinator for all cleanroom activities. In our cleanrooms, advanced optical instruments are built and tested for ESA missions such as NewAthena and future space exploration programmes. You safeguard cleanroom integrity by ensuring compliance with procedures, safety standards and quality requirements, while actively supporting daily operations on the floor. Working closely with scientist-engineers, you help prioritise projects and align the activities of lab technicians, contractors and support teams, bringing structure and clarity to a safe, contamination-controlled environment. You are a visible, approachable presence in the cleanroom. You coordinate activities, support colleagues and create transparency on priorities, helping teams work effectively and take ownership of their contributions. As People Lead for the cleanroom team, you support team members in their development and well-being, acting as their first point of contact for day-to-day guidance and growth, while conducting annual performance reviews and development conversations. 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 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 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