Empresarios Agrupados Agrupados-GHESA (EAG) is a leading Spanish engineering firm with over 60 years of experience and a broad portfolio of activities spanning power generation (nuclear, solar, wind, and combined cycle plants), industrial simulation, and more. With operations in over 80 countries and a team of more than 1,400 professionals—70% of whom are university graduates—EAG has successfully delivered major engineering projects totalling over 65 GW in generation capacity.

EAG has been recognized by Engineering News-Record (ENR) magazine in its prestigious “World’s Top 250 International Design Firms 2025” ranking in position 98, reflecting its global reputation and engineering excellence.

As the creator and principal developer of EcosimPro/PROOSIS, EAG brings decades of specialized expertise in the modelling and simulation of dynamic, multi-domain physical systems. Its engineering teams apply state-of-the-art tools and methodologies to simulate thermohydraulic processes, control systems, propulsion technologies, and complex multi-physics systems.

EAG clients worldwide rely on EcosimPro/PROOSIS to design and optimize advanced systems while reducing development costs and risks. For the past 25 years, EAG has provided exceptional support to the users in the use of the tools, enabling them to achieve their design goals. The software has been successfully used in diverse applications including rocket and aeronautical propulsion, environmental control systems, cryogenic plants, power generation cycles, fuel handling, fluid systems, and thermal balance studies for power plants, among others.

Driven by a strong commitment to innovation and collaboration, EAG partners with major international organizations such as ESA, ITER, CERN, and leading energy and industrial companies.

The company supports clients throughout the entire system lifecycle—from conceptual design and simulation to commissioning and operation.

EAG is headquartered in Madrid, Spain, but with distributors in USA, France, South Korea, Turkey, Japan, India and China. EAG continues to be a trusted partner in driving innovation through simulation, analysis, and digital engineering.