Chemical Process Engineer – materials and membranes (F/M)

Rennes
Permanent contract

About us

Sweetch Energy is a renewable energy player specialising in osmotic energy, committed to a carbon neutral world.

Our mission is to build a net zero future by exploiting a massively available, yet untapped, natural source of energy: osmotic power.

Strong beliefs in Top Sciences, Fundamental Research and DeepTech are core values.

Thanks to our INOD® technology, osmotic power will become a new pillar of the global electricity mix. It is the only solution in the world that can continuously convert salt water into 100% clean electricity at competitive price and on a large scale.

We are a manufacturer of osmotic generators and a producer of renewable electricity - we build & operate osmotic power unit in estuaries and deltas.

40% of our people has an international background. We love diversity and broad minded.

Our team is driven by a desire to push back the frontiers of renewable energy.

Your mission

Team & Mission

You will join the Material Development Team to industrialise an innovative material. Your mission: to transform validated formulations into robust manufacturing processes (formulation, coating/casting, drying), from the laboratory to pilot scale-up, then prepare for industrial transfer with repeatable performance — this position does not involve heavy chemical plant engineering.

Main Activities

  • Experimentation & DoE: Conduct design-of-experiments to understand the relationships between our manufacturing process, product formulation, and key product characteristics.

  • Manufacturing process: Develop and improve processes used in the production of our materials (reactors, filtration, dispersion, and coating).

  • Product/Process qualification:

    • Define key Product/Process parameters (temperature, viscosity, speed, web tension, atmosphere, etc.) and associated tolerances.

    • Develop and define control methods by specifying sampling points in the manufacturing process.

  • Quality control & metrology: Implement SPC/MSA and control plans to validate our manufacturing process and qualify the product.

  • Pilot runs & scale-up: Prepare and execute pilot batches, qualify tools and equipment, write SOPs and work instructions, and assess process capability (Cp/Cpk) as well as repeatability & reproducibility.

  • Industrial transfer: Contribute to the industrial transfer of our manufacturing process by participating in FAT/SAT validation with our suppliers.

  • EHS & compliance: Integrate HSE requirements (solvent management, emissions, ventilation, ATEX if applicable), REACH/VOC compliance; write risk analyses (process FMEA) and safety instructions.

  • Continuous improvement & cost-down: Contribute to Product/Process optimization to reduce product variability, propose alternative materials/processes, and quantify potential CAPEX/OPEX savings.

  • Documentation & change control: Contribute to writing manufacturing recipes, PFC/PCP, setup sheets, test reports, and support change management (ECR/ECO).

The ideal profile

  • Engineer/Master’s degree in process engineering, polymer chemistry, materials science, or equivalent.

  • 3–7 years of experience in films/membranes/coatings (R2R or batch): energy (electrodes/batteries, fuel cells), filtration, technical packaging, medical devices, etc.

  • Hands-on experience with unit operations: preparation/dispersion, functionalization reactors (batch/continuous), washing/neutralization, solid-liquid separation (filtration/centrifugation), drying, coating/casting, and web handling.

  • Quality tools: DoE, SPC, MSA, process capability Cp/Cpk; ability to read P&ID, basic utilities knowledge (HVAC, extraction, solvents), and process FMEA.

  • Strong documentation skills, field-oriented mindset, ability to prioritize and make decisions in uncertain contexts; cross-functional collaboration with Materials/Product/Process/Validation teams.

  • Professional English (international suppliers, documentation).

  • Assets: experience with cellulose or biopolymers; knowledge of interface or inorganic chemistry for material compatibility and selection of washing/CIP chemistries.

Interested? Apply now!

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