Who are we?

Who are we?

Oresys is an independent consultancy firm formed in 1981. We are a major player in the fields of management, organization and information systems consultancy.

Oresys is present in all economic sectors, where it partners both operational and functional departments.
We assist our clients in:

  • changing their business
  • steering their business
  • improving their performance

Our consultants are committed to every dimension of client business, whether organization and processes, information systems or change management. We deploy our skills and experience, along with the innovative methods and tools developed by Oresys.

We were the very first consultancy firm to obtain the ISO 9001 certificate in 1995, a proof of quality we have renewed every year since then. We are committed to a continuous improvement policy aimed at satisfying the expectations of our clients and guaranteeing the quality of our services.

Oresys is an international-scale consultancy firm. We are located in France, Belgium and Switzerland and present in 18 countries thanks to the Cordence Worldwide alliance, of which Oresys is a founding member.


Key figures

  • 270 staff in 2013
  • €43 M sales in 2013
  • 7 establishments: Paris, Lyon, Lille, Nantes, Brussels, Lausanne, Marseille
  • Present in 18 countries: 50 offices and 2,600 consultants via the Cordence Worldwide international network
  • Over 30 years’ experience