Junior Modeller Hightech Greenhouses

Contributing to innovative solutions for greenhouse climate and data analysis. Envision it. Become a modeller at TNO in Delft.



Education type



Hours a week

Fulltime – 40


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What will be your role?

Your core business? Collaborating on the development of software platforms for greenhouse design. Specifically, you’ll be working on expanding the TNO software program SIOM and a number of related programs. SIOM is used for the non-construction part of greenhouse design, such as the interior climate, energy consumption or material selection. TNO develops and maintains the software, and licensing is carried out through the Stichting Hortivation (Hortivation Foundation). Around 12 Dutch greenhouse construction companies are actively involved in the software development. Increasingly important elements are the exchange, analysis and application of data, for example on worldwide water availability or geological or meteorological data. You will contribute to this work by developing algorithms and combining them with existing software modules. In addition, you will support the senior researchers in communicating with our clients and with the Stichting Hortivation.

At TNO you’ll be working in the Building Physics & Systems department, in the Hightech Greenhouses team. We’ve been working for more than 25 years on constructive calculation tools, such as CASTA/Kassenbouw, and on international standardisation for greenhouses and other constructions. Furthermore, we contribute to decision-supporting models for designing greenhouses worldwide, which incorporate all kinds of design, climate and plant models. In addition, the development of the e-Growing-platform is one of our priorities. With this platform, we translate data from the greenhouse into specific actions to manage cultivation. Through these activities, we contribute to the global issue of providing food to everyone and we join in global trends such as urbanisation and local-for-local, in which people are increasingly producing and consuming food locally. We’re a small, close-knit team of some 10 colleagues – programmers, modellers and researchers – who regularly do something fun together, such as a treasure hunt in Delft or going out for a meal.
Read more about hightech greenhouses at TNO

How do you want to contribute to tomorrow's world? How big can your impact be? Come and work at TNO and envision it.

What we expect from you

You enjoy working in a team and you’re keen to learn. Multidisciplinary work comes naturally to you. But you also have no problem tackling tasks independently. You also have strong analytical skills, so that you’re able to translate physical and other processes that take place in a greenhouse into models, and also to program these processes in the TNO software package SIOM or related programs. Because you deal with many different clients, you have good language skills and can communicate easily in Dutch as well as English.

Other knowledge and skills you bring to TNO:
  • A university degree, preferably in the field of Mechanical Engineering, Biosystems Engineering or Engineering Physics.
  • Preferably also some work experience in the greenhouse cultivation sector.
  • Experience of programming with C# or other general purpose object-oriented languages such as Python or C++.
  • Experience of developing desktop applications and REST APIs, and an enthusiasm to learn more on this subject.

What you’ll get in return

Challenging and varied work with a real impact. And plenty of opportunities as, at TNO, you are in charge of shaping your career. We offer a gross monthly salary between € 2.900 and € 3.700 (based on your knowledge and experience), 8% holiday pay, a 13th month bonus of 8.33% and a flex budget (5.58% + € 180). In addition, you will be given every opportunity to develop yourself.

TNO offers optional employee benefits, enabling you to tailor your benefits package to match your personal situation. You may also expect:
  • A good pension scheme.
  • Travel allowance or a bike
  • An extremely professional, innovative working environment where colleagues are leading experts in their field.
  • 28 days annual leave and 5 compensation days under the reduction in working hours scheme (ATV, arbeidstijdverkorting) on a full-time basis.
  • Great social events with your team and other TNO colleagues. That’s how you will get to know a lot of people really quickly.
  • Flexible working hours and the possibility of working from home.
  • Access to our Talent Development Programme.
  • Networking opportunities and great activities organized by Jong TNO.
Read more about tailoring your benefits package.

TNO as an employer

As an independent research organisation, TNO bridges the gap between the academic and commercial worlds. We translate research results into clear applications and solutions, thereby solving future problems today. We will allow you ample time to give due consideration to the situations you are working on. Project complete? we will continue our journey of discovery, looking for new tools, models and advice that will benefit Dutch companies and organisations in the future. With around 3,000 employees, we are active in nine different spheres for a wide array of clients, including governments, SMEs, civil-society organisations, large companies and service providers.

The selection process

Please apply before August 9. The selection process comprises two interview rounds. The preliminary interview takes place on August 16. The second interview round has been scheduled for August 25. In a final meeting we will discuss the terms of employment and your tailored benefits package. We aim to finalize the entire process within four weeks. 

The selection process may include an online assessment and a reference check.

Has this job opening sparked your interest?

Then we’d like to hear from you! Please contact us for more information about the job or the selection process. To apply, please upload your CV and covering letter using the ‘apply now’ button.

Recruiter: Lara Dimitrovski
Mobile phone: +31 (0)6-507 40690

Hiring manager: Nancy Westerlaken
Phone number: 08886 63422

Note that applications via email and third party applications are not taken into consideration.


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Nancy Westerlaken MSc

  • Building Physics & Systems
  • Sustainability
  • Building Performance Modelling
  • Product And Concept Development

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