Contact an expert in Energy - ALTEN Group

Contact an expert in Energy

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ALTEN, an expert in the Energy & Environment sector

317 M€

2022 turnover





The energy transition and collective awareness of climate change has highlighted the need to shift the world’s energy towards a low-carbon energy mix, favoring renewable energies. However, renewable energies are intermittent, as their production depends on unpredictable weather conditions. Energy storage as part of the energy transition is therefore a major challenge for the next 25 years. 

With more than 3,000 engineers around the world involved in energy transition, ALTEN has been working with key players in large-scale strategic projects with important engineering components in the fields of nuclear power, renewable, oil & gas and energy storage. 

Zoom on…
Engineering Tomorrow’s nuclear 

New Nuclear



Net Zero

ISO 19 443


ALTEN has been working with key players in the sector on an international scale and across the entire nuclear value chain, positioning itself as an end-to-end service provider (R&D engineering, industrial methods, supply chain, digital, etc.). The company is also participating in large-scale strategic projects with high engineering requirements in the fields of New Built, operation and maintenance in operational condition, commissioning and start-up, decommissioning and waste treatment, transport and distribution.

In terms of nuclear quality and safety, ALTEN is ISO 19443 certified. ALTEN supports the progress towards decarbonation and the achievement of energy independence.  

Magazine Alt. #2

The world is actively exploring responsible nuclear power as an answer to pressing energy and environmental needs. Global awareness of the promise of nuclear power has grown in the light of climate change and increasing energy demands. The sector’s potential for innovation makes it a dynamic and vital field for the global workforce.

Find out more on how ALTEN, as a partner to leading names in the nuclear industry, holds a privileged position as an observer of market dynamics, and as a provider of cutting-edge technical expertise to support the design, maintenance, and safety of nuclear facilities.

“ALTEN operates internationally across the entire nuclear value chain, supporting the transition to decarbonisation and achieving energy independence.”

Stéphanie OUGIER – Executive Director – ALTEN

“We are helping the industry to adapt by recruiting the best talent, strengthening our centres of excellence, developing new skills and stimulating innovation.”

Benjamin GARDELLA – Managing Director – ALTEN


Renewal of the nuclear industry  

There is a growing demand for skills at all levels in today’s nuclear work force. ALTEN is identifying needs, applying knowledge, and conducting training to help build the capacity required, in France and elsewhere. 

ALTEN has created the Nuclear ALTEN Academy in order to achieve successful staffing with profiles from other sectors. ALTEN brings them the nuclear layer so they can work in these environments.  

Conception of new reactors  

A new generation of powerful nuclear reactors is being designed, tested and put into operation. They are intended to help decarbonize energy while ensuring safety. ALTEN supports its partners in developing and deploying these new reactors, aiming to make power more accessible, more sustainable and safer.  

Safety and security

Ensuring safety in the nuclear domain is a priority to protect human health, preserve the environment and secure infrastructure. Informed by lessons from the past while incorporating foresight as to future possibilities, all ALTEN staff are expected to apply an approach founded on a rigorous approach, a questioning attitude and effective communication.  

Extending power plants’ life

Nuclear power offers solutions to today’s burgeoning energy needs. In France, this means ensuring that the existing plants continue to function safely and efficiently while newer ones are in the offing. It also means preparing to deal with dismantlement once they become outdated.   

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