Partners bringing their complementary experiences together


Solutions for key challenges

TERGYS is the result of a series of encounters and a common desire to bring innovative and sustainable solutions that can meet the environmental and societal challenges of our planet.


Shared motivation and values

Cyril Schu

Cyril Schu is an expert in water management for industrial processes and more specifically in the paper industry.

Cédric Tollu

Cédric Tollu has more than 15 years of experience in business development in the field of renewable energy and energy storage.

Jean Michel Herrewyn

Jean Michel Herrewyn has more than 25 years of experience in the management of service and engineering activities, particularly in the fields of energy and water treatment.

Hélène Habarou

Hélène Habarou, expert in membrane treatment, has more than 15 years of experience in the treatment and distribution of drinking water.

Didier Bigeonneau

Didier Bigeonneau has more than 30 years of experience in business development of solutions and service offerings in water treatment, particularly in the field of Oil & Gas.


Jean Marie Boudet has more than 40 years of experience in the management of waste recovery activities and more particularly of bio-waste


TIGER One is an investment and development fund for the environmental business sector created by 11 partners wishing to support the development of young innovative companies.

ST@RTEC Energy

Thomas Debuisser launched Clairitec (a ST@ARTEC subsidiary) more than 20 years ago on graphic interfaces for industrial applications and then VENTEC developed the BMS (Battery Management System) and finally NEOGY to develop EMS (Energy Management System).

Hervé Suty

Thirty years of experience in R&D management in the spheres of environmental and water treatment.

SAUNAN Holding

Jean Michel Espenan and Franck Saux who have successfully developed the activities of POLYMEM, which produces ultrafiltration membranes, for over 20 years.