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Estimator

Deme

Zwijndrecht
Geplaatst op: October 28 2026
Summary

A successful tender starts with a well-considered strategy. Combine this with strong technical insight and you create the foundation for a reliable and competitive cost estimate. As a Calculator / Estimator at DEME Infra, you bring these elements together.

You will contribute to challenging civil and marine infrastructure projects, analysing technical and contractual requirements, developing feasible project approaches together with our specialists and translating them into competitive and well-founded cost estimates.

But this role goes beyond numbers. You understand how projects are built, identify risks and opportunities and explore which solutions offer the strongest technical and commercial approach.

At DEME, you will be part of one team working on projects that make a lasting impact. Guided by our values We care, we dare, we deliver, we give you the opportunity to take ownership, challenge the status quo and continue developing your expertise and career

Your responsibilities
  • Analysing tender documents, drawings, technical specifications and contractual requirements.
  • Preparing, structuring and substantiating detailed project cost estimates.
  • Determining quantities, production rates, man-hours, materials and equipment requirements.
  • Comparing alternative design and execution methods to identify the most suitable solution.
  • Assessing constructability, logistics, phasing, planning and safety considerations.
  • Requesting, analysing and comparing quotations from suppliers and subcontractors.
  • Identifying and quantifying project risks and opportunities.
  • Working closely with internal specialists to challenge assumptions and optimise the proposed project approach.
  • Presenting and substantiating your calculations during tender reviews.
  • Ensuring a clear handover to the project team after contract award.
  • In this role, you do more than prepare an estimate. You actively contribute to the strategy, feasibility and competitiveness of our infrastructure projects.

Your profile
  • You hold a bachelor’s or master’s degree in Civil Engineering, Construction Engineering, Industrial Engineering or another relevant technical field.
  • You have experience with cost estimation, calculations and analysing technical project information.
  • Previous experience as a Calculator, Estimator, Work Planner, Project Engineer or Site/Project Execution Engineer is a strong asset.
  • You have an affinity with civil works, infrastructure projects and/or marine construction.
  • You combine strong technical insight with commercial awareness.
  • You are comfortable assessing quantities, production rates, man-hours, materials and equipment requirements.
  • You work accurately and in a structured way while maintaining an overview of the bigger picture.
  • You are analytical, critical and solution-oriented, and you are willing to challenge assumptions to find a better approach.
  • You enjoy collaborating within a multidisciplinary team and communicate clearly with different stakeholders.
  • You are fluent in Dutch and English, both written and spoken.
  • You are proficient in Excel and comfortable working with specialised estimation, planning and project tools.
  • Depending on the tender or project, you are willing to occasionally visit project sites, suppliers or subcontractors.
Our offer
  • An extensive mobility program for a healthy work-life balance;
  • A permanent training track which allows you to develop yourself personally and professionally;
  • A stimulating, innovative workplace with numerous growth opportunities;
  • A people-oriented environment with an interactive health program and a focus on employee wellbeing.
Over Deme
Deme logo

DEME

DEME is een wereldleider in de zeer gespecialiseerde domeinen van offshore energie, baggerwerken, maritieme infrastructuur en milieuwerken. We houden ons ook bezig met concessieactiviteiten in offshore energie, maritieme infrastructuur, groene waterstof en diepzeemineraalwinning. Met 150 jaar ervaring en bijna 6.000 hooggekwalificeerde professionals hebben we een enorme bank aan kennis en expertise opgebouwd, waardoor we doorheen onze geschiedenis een pioniersrol hebben kunnen vervullen. Dit stelt ons in staat om op maat gemaakte oplossingen, innovatie en nieuwe technologieën naar de projecten van onze klanten te brengen, waarbij we ervoor zorgen dat deze veilig, efficiënt en kosteneffectief worden uitgevoerd.

  • Aantal medewerkers: meer dan 6.000 hooggekwalificeerde professionals wereldwijd.

  • Sectoren: Baggerwerkzaamheden en maritieme infrastructuur, offshore-energie (wind/olie en gas), milieusanering en infrastructuur (maritiem en civiel).

  • Voorkeur opleidingsniveau: MBO (beroepsopleiding) voor bemanningsleden/technisch personeel; HBO/WO (bachelor/master) voor ingenieurs, projectmanagers en kantoorfuncties.

  • Voorkeursopleiding: Civiele techniek, elektromechanische techniek, baggerwerkzaamheden en offshore-techniek, maritieme wetenschappen (Marof) of milieuwetenschappen.

  • Carrièreniveau: Alle niveaus, met speciale programma's voor studenten/stagiairs, afgestudeerden (via "Carrièredagen") en senior professionals (ingenieurs, managers en senior officieren).