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Working Student / Intern (m/f/d) Process & Sustainability Engineering

Posted Oct 15, 2026

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INERATEC GmbH

Karlsruhe

EnglishWerkstudentWorking student (Werkstudent)InternshipFluent German (C1+)

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Salary (estimate)

Full-time reference: €37,000–€58,000/year

About this job

Introduction

Short Description

About us

Together we want to do our part for a future worth living! You too?

For us, that means working today on sustainable solutions for tomorrow. This is exactly what we are doing with the further development and scaling of our innovative technologies for the production of CO2-neutral e-fuels and e-products.

We are pioneers in this field and welcome enthusiastic employees who will tackle and grow with us to make a climate-neutral future a reality. Only together we can achieve the necessary speed for this mission - which is why the team concept is our top priority. We take responsibility for each other and with each other, and we inspire each other. Every day.

Your tasks

Would you like to actively help shape the energy transition while gaining deep insights into the world of Power-to-X, e-fuels, and sustainability assessments? As a working student or intern, you can support us in the technical and environmental assessment of our processes and plants.

Conducting and evaluating process simulations for Power-to-X and e-fuel processes
Preparing and plausibility-checking mass and energy balances

Investigating different process configurations and operating cases

Supporting the creation and further development of Product Carbon Footprints (PCF) and Life Cycle Assessments (LCA)

Calculating and assessing greenhouse gas emissions, energy consumption, and CO₂ savings

Supporting ISCC certification and the related technical documentation

Collecting, structuring, and plausibility-checking process, energy, and emissions data

Researching regulatory and methodological requirements, particularly for e-fuels and RFNBOs

Further developing internal calculation methods, models, and templates

Collaborating with process engineering, technology development, operations, and other specialist departments

Advanced studies in process engineering, chemical engineering, environmental engineering, energy and environmental technology, or a comparable technical field
Interest in Power-to-X, e-fuels, process simulation, and sustainability assessment
Ideally, initial experience with process simulations, e.g. Aspen Plus, Aspen HYSYS, or comparable tools
Initial exposure to LCA, PCF, carbon accounting, or sustainability certification is an advantage
Good understanding of mass and energy balances as well as thermodynamic relationships
Confident use of Excel
Analytical, structured, and independent way of working
Very good German and English skills

The position is based at our Karlsruhe or Frankfurt office and is not a remote role.
A fast-growing start-up with a clear mission
Varied and responsible tasks
Plenty of room for initiative and creative freedom as well as personal and professional development
Flexible working hours
Flat hierarchies and an open corporate culture
Free drinks & snacks

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Job facts

Employer: INERATEC GmbH
Role: Working Student / Intern (m/f/d) Process & Sustainability Engineering
City: Karlsruhe
Work mode: not stated
Language: English
Seniority: Werkstudent
Posted: Oct 15, 2026
Source: StepStone

Company rating

Glassdoor 4.0
8 reviews
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Kununu 3.9
45 reviews
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Source: Statistisches Bundesamt (Destatis), table; dl-de/by-2-0; StarIn's calculation

Broad estimate: €44,000–€58,000/year