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Estimator

Deme

Zwijndrecht
Posted on: 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.
About Deme
Deme logo

DEME

DEME is a world leader in the highly specialized fields of offshore energy, dredging, marine infrastructure, and environmental works. We also engage in concessions activities in offshore energy, maritime infrastructure, green hydrogen and deep sea mineral harvesting. With 150 years of experience and nearly 6,000 highly skilled professionals, we have built up a vast bank of knowledge and expertise which has allowed us to foster a pioneering approach throughout our history. This enables us to bring tailor-made solutions, innovation and new technologies to our customers’ projects, ensuring that they are performed safely, efficiently and cost-effectively.

  • Number of employees: 6,000+ highly skilled professionals worldwide.

  • Sectors: Dredging & Maritime Infrastructure, Offshore Energy (Wind/Oil & Gas), Environmental Remediation, and Infra (marine and civil).

  • Preferred educational level: MBO (Vocational) for crew/technical staff; HBO/WO (Bachelor/Master) for engineering, project management, and office roles.

  • Preferred education: Civil Engineering, Electromechanical Engineering, Dredging & Offshore Engineering, Maritime Science (Marof), or Environmental Science.

  • Career level: All levels, with dedicated programs for Students/Interns, Graduates (via "Career Days"), and Senior Professionals (Engineers, Managers, and Senior Officers).