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Let's build the engineering of tomorrow together.

We are looking for fluid-mechanics enthusiasts, curious and rigorous, who want to push the limits of simulation in the service of concrete, demanding projects: data centers, stadiums, hospitals, industries.

Paris — 751164 open positions · permanent & internship
CFD engineering work at EOLIOS
Internal CFD modelling of a data center

At EOLIOS, every study is a scientific challenge serving a real-world stake: securing the cooling of a data center, guaranteeing the comfort of a large arena, proving the fire safety of an atrium. You will work alongside PhD engineers in fluid mechanics, with high-performance computing resources and a constant demand for rigour and clarity.

Why join us

What awaits you.

Projects that matter

Data centers, stadiums, hospitals, industries: real, high-impact studies on critical infrastructure.

Cutting-edge expertise

High-performance computing, parallelised solvers and high-fidelity models to keep building your skills.

A community of experts

A PhD-engineer lead per discipline, mutual support and knowledge-sharing every day.

An international dimension

9 offices across Europe and the world, projects and clients from every corner of the globe.

Open positions

Our job openings.

Ref. ING-CFD

CFD simulation engineer

PermanentParisFluid mechanicsFull time

The role

Reporting to a PhD-engineer lead, you run CFD studies end to end: needs analysis, 3D modelling, meshing, data setup, computation on our HPC resources and reporting. Your playing fields: data centers, HVAC engineering, industry, wind comfort.

Your responsibilities

  • Build quality geometric models and meshes.
  • Set up and run the computations (RANS, LES, transient) on cluster & cloud.
  • Analyse the velocity, temperature and concentration fields, and calibrate on measurements.
  • Produce clear deliverables: maps, sections, videos and expert reports.
  • Liaise with clients, architects and partner engineering offices.

Your profile

  • Engineer or PhD in fluid mechanics, energy or thermal engineering.
  • Command of a CFD solver (OpenFOAM, Fluent, StarCCM+ or equivalent).
  • Scientific rigour, analytical mind and a sense for reporting.
  • A taste for teamwork; technical English is a plus.
Ref. STAGE-CFD

Internship — CFD simulation engineer

InternshipParis4 to 6 monthsGap year / final year

The role

An immersion in the CFD engineer's craft, in learning and discovery mode. Continuously supported by a PhD-engineer lead, you gradually gain autonomy: you take part in real studies (data centers, HVAC engineering, industry) while learning EOLIOS's tools and method.

What you will do

  • Discover the full CFD chain: geometry, meshing, computation, reporting.
  • Contribute, in a pair, to real studies supervised step by step.
  • Train on the solvers and the high-performance computing resources.
  • Prepare summary visuals and sections for the reports.
  • Run, at the end of the internship, a project in near-autonomy.

Your profile

  • Engineering-school or master's student (energy, fluid mechanics, thermal).
  • Foundations in fluid mechanics and the desire to learn CFD.
  • Curiosity, rigour and a taste for teamwork.
  • First hands-on experience with a CFD tool is a plus, not a prerequisite.
Ref. ING-ISI

Fire simulation / fluid mechanics engineer

PermanentParisFire safetyFull time

The role

You carry out smoke-control and fire-safety engineering studies: simulation of the smoke, temperature and visibility, sizing of the systems, and demonstration of how people are kept safe (ESSOC law, IT 246/263).

Your responsibilities

  • Model fire and smoke-control scenarios (FDS / CFD).
  • Simulate evacuation and verify the tenability criteria.
  • Write the engineering notes and regulatory files (ESSOC, IT).
  • Liaise with inspection offices, project-management assistants and owners.

Your profile

  • Engineer in energy, fluid mechanics or fire safety.
  • Knowledge of ERP / high-rise regulations appreciated.
  • Command of a fire-simulation tool (FDS) or CFD.
  • An eye for regulatory detail and strong writing skills.
Ref. DAO-INFO

Draughtsperson-infographer / architect

PermanentParis3D modellingFull time

The role

You bring the studies to life: 3D modelling of the geometries, drawing layout, and infographics of the simulation results. You turn computed fields into clear, striking visuals — maps, sections, 3D views and videos — that make EOLIOS's signature.

Your responsibilities

  • Model buildings and equipment in 3D (CAD) for computation.
  • Prepare the geometries for CFD meshing.
  • Produce the renders, diagrams and report layouts.
  • Create reporting videos and animations.

Your profile

  • Training in technical drawing, architecture or infographics.
  • Command of 3D CAD tools and a graphics suite.
  • Aesthetic sense, rigour and attention to detail.
  • Familiarity with a technical / industrial world is a plus.
The process

How recruitment works.

01

Application

You send us your CV and a few words about your motivation, by email.

02

Conversation

A first interview to get to know each other and understand your expectations.

03

Technical

A practical exercise to discuss simulation and your skills.

04

Meeting

A visit to the office and meeting the team before the decision.

No opening fits? Write to us.

We are always open to profiles passionate about fluid mechanics. Tell us about your background and what drives you: a speculative application can open the door.

Speculative application
Keen to join us?

Let's talk about your career.

Send us your application: our CFD engineers will be glad to talk with you.

Contact us