A major player in the energy transition
At Sireos, we put our team's expertise at the service of those developing the energy infrastructure of tomorrow.
Accelerating the energy transition with high-performance, sustainable, and competitive power plants
A challenge of energy sovereignty
The shifts in the energy sector make energy management an ecological, strategic, and economic challenge. Diversifying the energy mix, securing supplies, and supporting reindustrialization have become priorities to reconcile decarbonization with Europe's energy sovereignty.
Unlocking the full potential of photovoltaics and storage
Renewable energy, particularly solar power, offers an inexhaustible and environmentally friendly energy source. To fully harness its potential, it is essential to rely on proven technologies, reliable engineering, and execution tailored to the complexities of the site.
A long-term partner to support you
At Sireos, we put our team's expertise at the service of those developing the energy infrastructure of tomorrow. Working alongside our clients in a long-term partnership, we develop solutions that meet a triple requirement: performance, sustainability, and cost-competitiveness.
These principles guide every project
Excellence & Innovation
Cultivating excellence by adopting the highest standards of quality and safety for increasingly high-performance power plants.
Team Spirit & Transparency
Adapting quickly to changes and unforeseen challenges to ensure the success of every project.
Agility & Responsiveness
Building lasting relationships based on trust, through transparent communication at every stage of our projects.
This rapid growth brings us to a key challenge: scaling up without losing what defines our identity. Our strength lies as much in our expertise as in our way of working, which is built on proximity, trust, responsiveness, and high standards.
Founding of Sireos
Over 500 MWp built
Sireos scales up
The Sireos team now numbers over 100 employees.
To support this growth, the company has moved into new offices in Paris.
The beginning of Sireos' international expansion
Sireos has surpassed the gigawatt-installed milestone and expanded its operations to Italy, its first location outside of France.
That same year, the teams commissioned Vert, the first hybrid power plant for Sireos.
Record capacity and setting course for new horizons
The Sireos teams are building Champvert-Marcy. At 140.6 MWp, it is the largest power plant built by Sireos to date and one of the most significant in France.
At the same time, Sireos is continuing its expansion in Europe, opening offices in Ireland and Finland.
A growing European footprint
Sireos is present in France, Italy, Ireland, and Finland, where local teams work directly with regional stakeholders (clients, subcontractors, etc.).
Each local branch benefits from a common foundation of QHSE methods and standards proven at the group level.
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