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You are enthusiastic about beautiful and challenging interior designs and enjoy studying how to realise such a design technically. You enjoy figuring things out and making calculations. As a calculator, you are already building the furniture we make in your head! You think about the materials, construction possibilities and internal hours needed to make a piece of furniture. With this, you are at the cradle of new projects and make an important contribution to a successful start of the project. This forms the basis for the rest of the process in which the furniture is actually made and installed. While calculating, you are in internal contact with the project managers and planners and externally with suppliers and clients for optimal cooperation!

Sufficient challenge for a new step? Then read more about this vacancy for calculator at INTOS in Haarlem.

What will you do?

What does a calculator do at INTOS? Join us for a day!

You start your day at 7:30 and settle yourself at your desk. A meeting is scheduled this morning with your project team leader. With him, you discuss the request for proposal for the redesign of the office of a tech company. In the early stages of the project, you are closely involved in the choice of materials and construction options. You are an important sparring partner, which is why you discuss the client's requirements together. After the meeting, you immediately set to work independently to map out the total costs, so that you can provide the client with a quote at short notice. You estimate the materials needed to realise this project from start to finish. You request quotations from suppliers to see what the purchase costs and delivery times are for a number of sheet materials and metal.

The morning has flown by and it is already time for lunch. You join us at our 'Groote Markt' where we all have lunch together or take a walk through the Waarderpolder. After the lunch break, you get the message that a request you calculated has now become an order! That's great, because you put a lot of time into the calculations last week and had regular contact with both the client and suppliers to arrive at the best calculation for the project. It involves the interior of a new hotel. The project manager has immediately scheduled a meeting with you and the work planner to ensure that you can properly transfer all the necessary information to each other. The end of the day is now approaching, but you already start calculating the number of internal hours needed to build the various pieces of furniture for the tech company's office. So you switch effortlessly between the various ongoing projects and no day is ever the same!

Want to get even more views on this position?

Take a look at our project page and find out which interior design projects we have recently completed. Who knows, you might calculate the next project!

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Vacancy interior calculator

Who are we looking for?

Knowledge & experience

  • At least 3 years of relevant work experience as a work planner or calculator in interior construction;
  • A completed education in a technical field;
  • Numerical and technical insight;
  • A good command of the Dutch language. English is an advantage.

What do we offer?

  • Central and varied role in large and small interior design projects realised by INTOS;
  • You will work in one of our compact and decisive project teams. A project team consists of 20-25 colleagues and projects are realised from A to Z within the team;
  • A full-time position (40 hours), but a part-time position (32 or 36 hours) is also quite possible;
  • Salary that shows appreciation for your knowledge, experience and background. Indication: €3,000 - €4,500 on a full-time basis;
  • Nice benefits offer: 24 holidays and 6 ATV days, a travel allowance, a generous pension scheme, collective health insurance and free use of our gym and bootcamp;
  • Wonderful new workplace in Haarlem which can be reached from Amsterdam, Leiden, Alkmaar and Utrecht in about 30 minutes;
  • Down-to-earth and family-oriented working environment in which people enjoy working genuinely together;
  • Plenty of room for your ambitions within our internal development programme INTOP;
  • Various joint activities such as daily lunch, periodic get-togethers, a summer BBQ and an annual weekend away. Want to see more of our corporate culture? Watch our video here 'We are INTOS | Our corporate culture‘.
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You as a person

You are:

  • Good at making things your own quickly and good at asking questions;
  • Solution-oriented and likes to think in terms of possibilities;
  • Someone who enjoys working independently, but can also easily interact with different colleagues;
  • Living in the Randstad region or surrounding area.


If you recognise yourself in the above profile, we would love to hear from you!

Are you our new calculator?

Already looking forward to getting started? Apply immediately by form below fill in. Do you have any burning questions first? Whatsapp or call with our recruiter Myrthe on 06-40 74 34 34.

Apply directly

What does the application process for calculator look like next?



Got excited and want to apply? Fill in the form! We will review your application carefully and within two weeks you will know whether we will invite you for an introductory interview.


Introduction interview

The first introductory meeting is with Myrthe Duijff and Hans Matze. During this meeting, we would like to get to know you and tell you more about INTOS!



Are we both enthusiastic after the first interview? Then a second interview with two other INTOS employees will follow. During the second interview, we will go deeper into the function and the possible match between you as a person and our company.



Are we and you enthusiastic? Then you will receive a proposal to start working at INTOS!



We make the contract for you and after putting your (digital) signature, you are ready to become a real INTOS'er. Welcome!

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