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Internship – Nuclear Civil Engineer (M/F)

AltenCompany website

MarseillePublished on 21 October 2026

You handle civil engineering non-conformities on operating nuclear plants: technical analysis, standards checks and action plan follow-up, at Alten in Marseille.

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Job description

You join Alten’s energy department in Marseille. The team provides technical and project management support to the major programme that keeps France’s operating nuclear fleet in service.

You analyse technical solutions (calculation notes, drawings), check nuclear standards and manage your own non-conformity cases. The team trains you, and you work with design offices, project engineers and on-site technicians.

This is a final-year internship for a future graduate of an engineering school or a master’s in civil engineering.

What you'll do

  • Resolving non-conformity reports: analysing technical solutions (calculation notes, drawings, technical documents)
  • Resolving non-conformity reports: checking compliance with nuclear standards (RCC, Eurocodes, NF C)
  • Resolving non-conformity reports: approving or modifying the technical solution to best meet the client’s needs
  • Resolving non-conformity reports: writing response sheets
  • Managing communication between stakeholders (design offices, project engineers and site technicians)
  • Managing your own portfolio of non-conformity cases: tracking progress and making sure action plans are carried out

Who they're looking for

  • Future graduate of an engineering school or a master’s-level programme in civil engineering
  • Looking for a final-year internship in the nuclear sector, a field that interests you
  • Strong writer and communicator
  • Able to prioritise

Prepare your interview

  1. Learn what Alten does, the sector it works in and the projects on its website.
  2. Go through each task listed here and work out why the team needs it done.
  3. Prepare a real example for each task, then tie it back to what the company does.
See the full method and a sample answer (in French)

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