wo vacatures in Rijnsaterwoude

Internship Mechanical Engineering (start February 2026) • Sonion

• Doing business with Sonion Contact

  Microphones

  Miniature Electret and MEMS microphones for hearing aids designed for high performance and low power, in highly customizable packages.

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  Balanced Armature receivers for all hearing aid power levels and applications, in single or dual configurations, as well as hybrid and electrostatic receivers for special and professional use.

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  RICs

  Highest performance fully customized RIC solutions tailored to your preferences and requirements, as well as ready-made steel or plastic-based RIC systems designed for versatile hearing aids, assembled state-of-the-art hearing aid manufacturing facilities.

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  Connector Systems

  Connector System solutions that ensure flexibility, reliability and functionality to fit your designs, incl. 4, 6 and 8 pin plugs and sockets as well as connectors and cables.

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  Coils & Micro Mechanicals

  NFMI and Telecoils optimized for highest sensitivity with ferrite or mu-metal cores, and the highest quality hearing aid trimmers, dampers, push buttons and volume control to optimize the functionality, usability and comfort of hearing aids.

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  Voice-pick-up bone sensors for special headsets, earphones or earbuds for clear voice pick-up in extreme conditions, and Biometric sensor solutions for RIC hearing aids expanding the user value propositions.

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Internship Mechanical Engineering

Who are we?

Sonion is a global leader in the market for transducers used in the hearing aid and audio industry, and our ambition is to grow from this strong core. Our vision is: We help the world listen.

At Sonion we believe in the importance of investing in new talent. We want to introduce students to an environment where they are given responsibility and the freedom to develop their skills. In Hoofddorp you will join approx. 100 of our colleagues as we design new products for the hearing health and pro audio market. Whether you prefer doing CAD work for injection molded parts, designing tools for new problems that arise during development or helping further our inhouse 3D printing capabilities, Sonion can find a fit for your skillset. We offer internship positions every semester and are always on the lookout for new talent to join our team.

Your tasks and responsibilities will include

• Designing housings and other plastic components in CAD;
• Testing and developing tooling;
• 3D printing prototypes and tooling;
• Helping to develop our new prototyping processes, such as lasering, 3D printing and proto-injection molding

Your profile

• Currently studying for an engineering degree, Industrial Product Design, Mechanical Engineering or similar;
• Fluent in English, written and spoken. Sonion is an international company and with the Hoofddorp office we have colleagues from all over the world. Basic/fluent Dutch is a plus;
• CAD experience. Our main CAD package within Sonion is SolidWorks. However we also make use of Autodesk Fusion360 and Meshmixer. If you have experience with Inventor, Catia or another CAD package then we can give you the training required to use SolidWorks.
• Proactive and willing to take ownership of responsibilities.

Equally important to your knowledge and experience, are you as a person. We are looking for a person, who is proactive, eager to learn, hands-on and results driven. You can also interact effectively with people from all backgrounds.

Sonion - We help the world listen.

Are you passionate about making a difference in people's lives? So are we!

We are dedicated to enhancing the quality of life for people who rely on hearing products. Sonion is the preferred innovation partner for development and manufacturing of transducers and electromechanical solutions for hearing instruments and professional earphones.

Sonion is a truly global company with more than 6000 colleagues working together to revolutionize the industry at our facilities in the Netherlands, Denmark, Vietnam, USA, Poland and China.

Our skilled team is constantly pushing the limits of what's possible, leveraging cutting-edge technology to challenge the laws of physics and create smaller, better and more reliable products and solutions.

What we offer you

• Internship starting February 2026 and lasting for 5-6 months with possible extension;
• Your own workspace with all the hardware you will need;
• Compensated travel expenses if you don't have your Study OV card;
• €605 monthly internship allowance;
• Flexible workhours;
• Free parking in our parking lot;
• An office located a 5-minute walk away from Hoofddorp train station.

More importantly, we offer you a professional work environment that gives you the opportunity to steadily further develop. In this project, you will get a lot of responsibility and chances to use your knowledge in the field. You and your supervisor will regularly reflect on your work. Sonion is an international and inclusive organization where it is easy to connect with colleagues. So, what are you waiting for?

Further information and application

Do you study Mechanical Engineering or something similar? Email us your motivation letter, your CV, and your portfolio (If applicable) to .