Concrete Mix Chemist — Sustainability

Hextal Group N.V.; Rotterdam; On-site; EUR 90,000 - 120,000; Full time

Benefits offered by this job

Relocation support

Pension plan

Sabbatical after ten years

Development budget €5,000 annually

Job summary

HEXTRAL Group N.V. seeks a senior materials specialist to advance the CB-7 recycled concrete blend from its Rotterdam laboratory. You will optimize mix designs for structural applications, validate performance to EN 206 standards, and collaborate with project teams to deploy low-carbon concrete across major programmes.

The role blends cutting-edge research with practical deployment, with a strong sustainability focus, relocation support, and a clear path for professional development.

Qualifications

• MSc or PhD in Materials Science, Chemistry, or Concrete Technology.
• Minimum 5 years of experience in concrete mix design, testing, or cementitious materials research.
• Expert knowledge of EN 206 and EN 13791 standards for concrete specification and testing.
• Experience with supplementary cementitious materials, recycled aggregates, or alternative binders.
• Publications in peer‑reviewed journals related to sustainable concrete is an advantage.
• Fluent English; Dutch language skills are an advantage.

Responsibilities

• Advance HEXTRAL's CB-7 recycled concrete blend within the group sustainability and R&D function.
• Optimize mix designs for structural applications.
• Validate performance against EN 206 standards.
• Collaborate with project teams to deploy low-carbon concrete across major programmes including the Brenner Tunnel and Maasvlakte III.

Skills

EN 206 & EN 13791 knowledge

Concrete mix design

Cementitious materials research

Fluent English

Dutch language advantageous

Education

MSc in Materials Science, Chemistry, or Concrete Technology

PhD in Materials Science, Chemistry, or Concrete Technology

Job description

You will advance HEXTRAL's proprietary CB-7 recycled concrete blend within the group sustainability and R&D function. Working from the Rotterdam laboratory, you will optimise mix designs for structural applications, validate performance against EN 206 standards, and collaborate with project teams to deploy low‑carbon concrete across major programmes including the Brenner Tunnel and Maasvlakte III.

What we are looking for

• MSc or PhD in Materials Science, Chemistry, or Concrete Technology
• Minimum 5 years of experience in concrete mix design, testing, or cementitious materials research
• Expert knowledge of EN 206 and EN 13791 standards for concrete specification and testing
• Experience with supplementary cementitious materials, recycled aggregates, or alternative binders
• Published research in peer-reviewed journals related to sustainable concrete is an advantage
• Fluent English; Dutch language skills are an advantage

Compensation and benefits

Competitive and market-aligned, benchmarked annually against European infrastructure peers.

Pension

10% employer contribution from day one. Employee contributions are voluntary.

Holiday

28 days annual leave plus public holidays. Additional days accrue with tenure.

EUR 5,000 annual budget for courses, conferences, and professional certifications.

Relocation

Full relocation support for cross-border moves, including visa assistance and housing allowance.

Paid sabbatical of up to three months available after ten years of continuous service.

HEXTRAL Group N.V. is an equal opportunity employer. We welcome applications from candidates of all backgrounds, regardless of gender, ethnicity, disability, sexual orientation, or age. All hiring decisions are based on merit, qualifications, and business needs.