R&D Lab Technician (ACL)

everox; Rotterdam; On-site; EUR 45,000 - 55,000; Full time

Benefits offered by this job

ESOP ownership

Zwitserleven pension

27 days annual leave

Training and development

Job summary

everox is building a dedicated Advanced Characterization Lab in Rotterdam. As R&D Lab Technician, you will test concrete and cement-based materials using XRD, XRF and TGA, prepare samples through crushing, milling and sieving, and ensure reliable, well-documented results.

You will maintain lab operations, plan calendars, order consumables, calibrate instruments and write SOPs. Your reports will guide engineers in mix designs and product specs for recycled aggregates and low‑carbon cement

Qualifications

• HBO/BSc degree in Materials Science, Concrete Technology, Cement Chemistry, Geochemistry, Mineralogy or a related field.
• At least 2 years of laboratory experience.
• Hands-on experience with XRD, XRF, FTIR, laser diffraction, calorimetry, TGA and acid leaching workflows.
• Experience in laboratory data management and analysis, including working with a laboratory information management system (LIMS).
• Solid data and Excel skills.
• Familiarity with EN 196/197/206, EN 12350/12390 and EN 933/1097, or the willingness to learn them.
• An organised, safety-conscious way of working, and comfort with managing multiple priorities.
• Ability to work on site at our lab in Rotterdam at least four days a week and available per 1 January 2027.

Responsibilities

• Plan and run advanced characterization tests on concrete and cement-based materials: XRD, XRF, FTIR, laser diffraction, calorimetry, TGA and acid leaching.
• Document every test carefully, so results are reliable and easy to trace back.
• Prepare samples for testing, including crushing, milling, sieving and test-specific preparation.
• Plan the lab: manage the lab calendar and instrument bookings, and make sure consumables are always in stock.
• Receive and register incoming samples, and keep a clear chain-of-custody from intake to result.
• Write, maintain and improve the lab's standard operating procedures (SOPs).
• Keep quality high with QA/QC checks, calibrations and control charts, working with an ISO/IEC 17025 mindset.
• Manage and analyse lab data, and summarise the results in clear reports.
• Work closely with the R&D engineers, so your results guide our mix designs and product specifications.

Skills

Hands-on lab work

Data analysis

Safety-conscious

Multitasking

On-site work

Education

HBO/BSc in Materials Science or related

Tools

XRD

XRF

FTIR

Laser diffraction

Calorimetry

TGA

Acid leaching

LIMS

Job description

Shape the future of circular concrete.

everox reduces global CO₂ emissions by transforming waste concrete into high-quality substitutes for cement, aggregates and sand through our patented upcycling technology.

We are now moving from pilots to industrial production. Our first commercial plant in 's-Gravendeel turns waste concrete into new building materials: recycled sand and aggregates, and a low-carbon replacement for cement. More plants and products will follow. To make the best materials, we need to know exactly what is in them.

That is what our lab is for, and that is where this role comes in.

About the role

As R&D Lab Technician, you run our Advanced Characterization Lab independently. You test samples of concrete and cement-based materials with techniques such as XRD, XRF and TGA. You prepare the samples yourself, from crushing and sieving to milling, and you make sure every result is reliable and well documented.

You also keep the lab running smoothly. You plan the lab calendar, receive and register samples, order consumables and keep the instruments calibrated. You write and improve our lab procedures, so that every test is done the same way every time.

Your results really matter. You turn lab data into clear reports, and our R&D engineers use them to design new concrete mixes and set the specifications for our products: recycled aggregates, ultrafines and low-carbon cement replacements.

You work closely with the R&D engineers and report to our Head of Product. This is a hands-on role in the lab, with room to grow into a senior position as you gain experience.

The lab is where the work happens, so you work on site in our lab at SubZero in Rotterdam at least four days a week.

Responsibilities

• Plan and run advanced characterization tests on concrete and cement-based materials: XRD, XRF, FTIR, laser diffraction, calorimetry, TGA and acid leaching.
  • Document every test carefully, so results are reliable and easy to trace back.
    • Prepare samples for testing, including crushing, milling, sieving and test-specific preparation.
      • Plan the lab: manage the lab calendar and instrument bookings, and make sure consumables are always in stock.
        • Receive and register incoming samples, and keep a clear chain-of-custody from intake to result.
          • Write, maintain and improve the lab's standard operating procedures (SOPs).
            • Keep quality high with QA/QC checks, calibrations and control charts, working with an ISO/IEC 17025 mindset.
              • Manage and analyse lab data, and summarise the results in clear reports.
                • Work closely with the R&D engineers, so your results guide our mix designs and product specifications.

What you bring

You have a few years of lab experience and you love hands-on work. You enjoy working with concrete and cement, you work carefully and safely, and you care about good data. You can keep several things going at once without losing track.

• HBO/BSc degree in Materials Science, Concrete Technology, Cement Chemistry, Geochemistry, Mineralogy or a related field.

• At least 2 years of laboratory experience.

• Hands‑on experience with XRD, XRF, FTIR, laser diffraction, calorimetry, TGA and acid leaching workflows.

• Experience in laboratory data management and analysis, including working with a laboratory information management system (LIMS).

• Solid data and Excel skills.

• Familiarity with EN 196/197/206, EN 12350/12390 and EN 933/1097, or the willingness to learn them.

• An organised, safety‑conscious way of working, and comfort with managing multiple priorities.

• Ability to work on site at our lab in Rotterdam at least four days a week and available per 1 January 2027.

Nice-to-haves

• Experience working in an ISO/IEC 17025 environment.

• Python/Jupyter skills for data analysis.
  

What we offer

• Competitive compensation based on the market, your experience and qualifications (€45,000-€55,000 gross per year including holiday allowance).
  • Employee ownership through our ESOP and a company pension plan at Zwitserleven.
    • 27 days of annual holiday leave.
      • A one-year contract for 40 hours per week, with the intention to extend to a permanent contract.
        • Training and development, including vendor training where relevant.
          • An impactful position in a fast-growing, mission-driven scale-up.