Holcim AG
Würenlingen
Intern / Working Student Sustainability & Process Optimisation 80-100 %
- 23 May 2026
- 80 – 100%
- Würenlingen
Job summary
Holcim (Schweiz) AG offers innovative, sustainable building solutions. Join a dynamic team focused on health, safety, and environmental consciousness.
Tasks
- Lead projects enhancing sustainability in cement production.
- Optimize natural resource usage and promote recycling initiatives.
- Analyze and improve processes to reduce CO2 emissions effectively.
Skills
- Pursuing or completed a degree in materials science or engineering.
- Strong analytical skills with a focus on process technology.
- Proficient in German and English, both written and spoken.
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About the job
Holcim (Switzerland) AG is one of the leading providers in Switzerland for innovative and sustainable construction solutions in the fields of building construction, civil engineering and infrastructure. With around 1200 employees at over 60 locations across Switzerland, we produce concrete, gravel and cement and recycle demolition materials into resource-saving products.
Intern / Working Student Sustainability & Process Optimisation 80-100 %
Würenlingen, AG, CH, 5303
We offer you diverse and challenging fields of activity, where we always pay attention to health, safety and environmental awareness. We place great value on you being able to maintain a balance between your professional and private life. A collegial working atmosphere, fair employment conditions and the promotion of your personal development are a matter of course for us.
You don’t just want to watch, but actively help shape the decarbonisation of industry? Then you are exactly right with us. In your 6-month fixed-term internship, you will dive deep into our core strategies around decarbonisation and circular economy and work on sustainable solutions for the industry of tomorrow.
For our Siggenthal cement plant, we are looking for a curious and committed personality who will join us in exploring new paths for sustainable building materials and resource-saving processes.
Your mission:
You independently take on projects with high networking across various areas of the cement plant
You optimise the use of natural raw materials and promote the use of recycled materials
You actively work to reduce the CO₂ footprint and energy demand of our products – while maintaining consistently high quality.
Your field of activity:
- Raw materials:You classify natural raw materials, products and recycled materials and define optimal mixtures for the highest possible proportion of circular materials.
- Analytical methods:You understand, evaluate and compare existing analytical methods for mineral substances.
- Process engineering:You analyse and optimise process steps such as grinding, mixing, homogenising and conveying raw materials.
- Control technology:You optimise existing control mechanisms and further develop an ongoing investment project to improve analysis and control technology.
Your profile:
- You are enrolled in a Bachelor’s or Master’s degree programme or have already completed one – ideally in materials science, process engineering or chemistry
- You have a hands-on mentality and enjoy both planning projects and conducting tests directly in the plant or laboratory
- You work in a structured, self-initiated manner and enjoy working in a team and have an interest in process engineering
- You have good German and English skills, both spoken and written
What we offer you (besides the foundation for your career)
Mentoring on equal footing: Our Plant Manager is your sparring partner – open, honest, direct.
Impact: You work on the biggest challenge of our industry: building the future without emissions.
Security & Freedom to act : The strength of a global market leader behind you, the freedom of a local plant right in front of you.
Ready to start your career?
We are not looking for perfect CVs, we are looking for real personalities.
If you want to not only manage the foundation of Switzerland but reinvent it, then get in touch.
Let’s not talk about jobs. Let’s talk about your future at the plant. We look forward to your application!
We are proud to live a culture of diversity and inclusion. Our policies and practices are designed to protect our employees, build trust and support them in reaching their full potential.
Our corporate values stand for equal treatment of all persons with regard to employment and employment opportunities. We actively ensure that ethnic or national origin, religion, sexual orientation, marital status, gender, gender identity, age, disability as well as other legally protected characteristics play no role in the recruitment and development of talent. We invite you to become part of our culture and to help us create an inclusive and diverse working environment together.
