Structural Engineer – Intern (M/F)

About Mareal

Mareal is an engineering company for the offshore industry founded in 2002. We carry out studies from design through to execution and construction drawings for marine energies and the subsea oil & gas sector. Our team of 25 engineers and designers is based in L’Haÿ-les-Roses and Nantes.

MAREAL is part of the STAPEM group, a specialist in offshore works, logistics, maintenance, diving operations, ROV, and more recently drone inspection. Two multidisciplinary engineering divisions, including MAREAL, strengthen the group’s ability to offer turnkey project solutions to its clients.

Since 2016, MAREAL has been developing a floating foundation for offshore wind turbines made of prestressed reinforced concrete, capable of accommodating the turbines anticipated for 2030 with a power of 20 MW and more. The design of the floater includes the mastery of coupled hydro–mooring–aero-servo calculations, naval architecture and structural engineering, as well as construction yard implementation and operational aspects related to installation and maintenance.

We uphold the values of engineering based on four pillars, which also form the foundation of our commitments and reputation:

• Reliability: marine installations require the delivery of reliable results in a professional environment built on trust.
• Quality: anticipating and identifying risks and providing solutions to mitigate them.
• Agility: our priority is the success of the project, in a spirit of partnership and collaboration.
• Sincerity: working transparently by highlighting challenges encountered and possible solutions, while maintaining necessary confidentiality.

With our strong experience in offshore projects, we make our expertise a valuable asset to manage challenges and enhance client performance.

In this context, structural engineers work closely with coupled-analysis specialists to validate and optimize structures subject to operational or extreme environmental loads, as well as fatigue loading.

Reinforced concrete in marine environments requires validation under specific loading conditions, taking into account stresses in all constituent elements—concrete, reinforcement, and prestressing cables—crack control, and the assessment of minimum compressed thickness in elements providing buoyancy and stability.

Mission

• Optimization of the structural calculation chain with hydrodynamic, aerodynamic, and dynamic loads derived from ILA (Integrated Load Analysis)
• Evaluation of accumulated fatigue damage
• Conducting studies on the influence of design parameters

Profile Description

• You are completing a Naval Architecture / Offshore Engineering degree with skills in structural engineering, hydrodynamics, or coupled analysis, and you are autonomous in Python programming
• Knowledge of reinforced concrete structures is an asset
• You want to learn best engineering practices in line with the state of the art
• You have a strong interest in technical subjects and engineering and demonstrate autonomy
• You are able to discuss technical and industrial subjects in English
• You enjoy working in a team and contributing to a dynamic environment
• You are attracted to the field of marine renewable energy and offshore operations, and you have an understanding of the sea and its environment

Tools and Software

• Finite Element Analysis: ABAQUS or similar
• Knowledge of Wind Energy and/or Offshore Standards
• Programming: Python
• Windows Suite: Word, Excel

Additional Information

• 6-month internship between February and September 2026
• Position based in the city center of Nantes