At the helm of the Energy Transition, Tractebel provides a full range of services throughout the life cycle of its clients’ projects. As one of the world’s largest engineering consultancy companies and with more than 150 years of experience, we are able to offer our customers multidisciplinary solutions in energy, water and infrastructure. Our broad range of expertise extends across Europe, Africa, Asia, Middle East and Latin America, allowing us to rise to our clients’ most demanding challenges with the same high-quality engineering and consulting services no matter where their projects are. Thanks to its networking structure and global approach, Tractebel can offer multidisciplinary solutions, anywhere in the world.


Ecofys is a key player in sustainable energy solutions and climate change issues. Forming a powerful team with Navigant, Ecofys is part of the leading global energy consultancy. Profound knowledge, innovation and dedication are what drive our daily work. These ambitions and skills are reflected in our leadership in Europe and the Middle East. The Ecofys company values are part of the daily working life. They define the culture and guide the company in choosing what is right. They constitute Ecofys’ identity and bind the company as a group of individuals. They establish expectations and predictability within the company and in the relations to clients, partners and other stakeholders. At the very basis they imply respect and responsibility for people and planet

E3-Modelling (E3M) is a spin-off company based on expertise and model developments created through research activities performed since 1989, within E3MLab of the Institute of Communication and Computer Systems (ICCS) of the National Technical University of Athens. E3M has fully inherited the personnel, their expertise, the modelling tools and references of E3MLab. The well-established models PRIMES, GEM-E3, Prometheus, PRIMES-Internal Electricity Market, PRIMES-electricity market oligopoly, PRIMES-natural gas market, PRIMES-TREMOVE transport models, PRIMES-Biomass and others fully operate at E3M and provide consultancy services to several clients, among which governments in Europe, the European Commission, Professional Associations and private entities. E3-Modelling specialises in the development and use of large-scale applied models and carries out impact assessment studies focusing in the fields of economy, energy and the environment. The company provides consultancy services based on the use of complex large-scale applied mathematical models and inherits the curriculum of E3MLab, the modelling experience and the personnel. E3Modelling has already significant references with projects using major large-scale models such as PRIMES, PRIMES-TREMOVE, GEM-E3 and Prometheus. The company provides modelling capacity building, regional and sectoral, customised models and consultancy services for quantitative policy assessments together with analytical expertise.