Cleanroom Technician for Space Optics

cosine

YOUR (SPACE) MISSION As a Scientist or Mechanical Engineer at cosine, you will contribute to cutting-edge technologies that enable space exploration, Earth observation, and advanced scientific research. Whether your expertise lies in physics, mechanics, electronics, optics, thermal engineering, or systems development, you will work alongside multidisciplinary teams to solve complex technical challenges and transform innovative ideas into real-world instruments and systems. At cosine, we combine scientific excellence with hands-on engineering. Our teams develop high-performance technologies for international space missions, scientific facilities, and industrial applications. Depending on your background and interests, you will be working on projects that range from concept development and modelling to testing, integration, and validation. We are always interested in meeting talented MSc and PhD graduates who are eager to push technological boundaries and make a tangible impact on the future of science and space exploration. Potential opportunities include: * Scientist Engineer Thermo-Mechanical Develop and analyse thermal and mechanical solutions for high-performance instruments operating in challenging environments. You will contribute to the design, modelling, testing, and qualification of systems that must perform reliably in space and other demanding applications. * Scientist Engineer Electronics / Avionics Design, develop, and validate electronic subsystems that form the backbone of advanced space instrumentation. Your work may involve embedded electronics, avionics architectures, hardware verification, and system integration, contributing directly to mission-critical technologies. * Scientist Engineer Silicon Pore Optics Support the development of next-generation X-ray optics based on Silicon Pore Optics technology. You will design and execute experiments, analyse measurement data, work with precision assembly processes, and contribute to technologies that enable future space telescopes and advanced scientific instrumentation. * Mechanical Engineer Translate complex technical requirements into innovative mechanical designs and practical engineering solutions. You will work across the full development cycle, from concept generation and detailed design to manufacturing support, testing, and customer-facing project activities. YOUR PROFILE We are looking for candidates with the following qualifications: * MSc or PhD degree in Physics, Mechanical Engineering, Aerospace Engineering, Electrical Engineering, Applied Physics, or a related technical discipline * Strong analytical and problem-solving skills combined with a hands-on engineering mindset * Affinity with complex multidisciplinary systems and technology development * Experience through academic research projects, industrial R&D, or relevant engineering activities * Ability to communicate effectively in English within an international environment * Curiosity, initiative, and motivation to contribute to innovative technologies for space and science * Residing within commuting distance of Sassenheim, the Netherlands, or willing to relocate 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 based on the extend of relevant experience and seniority of the position * 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 plans * 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 NewAthena 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.

cosine

YOUR (SPACE) MISSION As the AIV (Assembly, Integration and Verification) Engineer at cosine you turn advanced optical instruments for Earth observation into high-quality systems that deliver reliable, accurate data from space and airborne platforms. You work at the heart of our Remote Sensing activities, where precision assembly, rigorous verification and system insight come together to enable measurement of our planet at an unparalleled level of detail. Your work directly contributes to instruments that support environmental monitoring, climate research and scientific discovery. TASKS & RESPONSIBILITIES In this role you will: * Assemble, integrate and verify optical and optoelectronic remote sensing instruments in a laboratory or cleanroom environment  * Perform functional and performance testing at component and system level, with a focus on optical alignment, calibration and measurement accuracy  * Execute and support environmental and qualification testing to ensure reliability in operational conditions  * Identify, analyse and resolve technical issues during integration and testing, working closely with multidisciplinary engineering teams  * Maintain clear documentation of procedures, test results and verification status, contributing to project deliverables and reviews YOUR PROFILE We are looking for candidates with the following qualifications: * Bachelor degree in mechanics, aerospace, optics, optomechatronics, precision engineering, electronics or a related field  * Around 3 years of experience in assembly and integration of optoelectronic systems or similar high precision systems * Hands-on experience working in a lab or cleanroom environment * Strong attention to detail, with a focus on delivering high-quality hardware and documentation  * A proactive, result driven mindset and the ability to collaborate confidently and effectively in multidisciplinary teams * Good verbal and written communication skills and a structured approach to documenting and sharing knowledge 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 * Hybrid working options, including the possibility to work partially from home  * 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 NewAthena 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.

cosine

YOUR (SPACE) MISSION As the Maintenance Engineer High-Tech Laboratories & Production at cosine you ensure the reliability of the advanced equipment that enables the development and production of cutting-edge space instrumentation. From laboratory systems and cleanroom equipment to high-precision production machinery, you play a vital role in keeping our operations running safely, efficiently, and without interruption. You will work in a unique environment where science, engineering, and manufacturing come together. By combining preventive maintenance, technical troubleshooting, and continuous improvement, you directly contribute to the quality, safety, and continuity of projects that support some of the world's most ambitious space missions. TASKS & RESPONSIBILITIES In this role you will: * Execute, optimize, and continuously improve preventive maintenance plans for laboratory equipment, production machinery, and facility-related systems * Diagnose technical failures, identify root causes, and coordinate effective solutions to minimize downtime and operational impact * Manage spare parts, maintenance materials, and supplier activities to ensure equipment availability and reliability * Maintain accurate maintenance records and asset information within the asset management system and communicate proactively with stakeholders * 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 NewAthena 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.