Executive Committee

DEMETA’s Executive Committee is composed of highly qualified and experienced members with relevant expertise in all critical functions, fully aligned on corporate social responsibility matters, with the goal to create value for its customers, shareholders and partners.

Picture of Patrick PIOT, CEO

Patrick PIOT

Chief Executive Officer

Patrick Piot

Chief Executive Officer

Patrick PIOT is CEO at Demeta S.A.S since January 2017.

Prior to that, Patrick worked 9 years for ARD then BioAmber Inc. as Vice-President Marketing and Business Development, pioneering the development and commercialisation of the first large-scale bio-based succinic acid facility. In his role, Patrick led business development, sales and marketing activities, as well as strategic partnerships and alliances. He also worked 10 years in various sales and purchasing positions at Rhône-Poulenc, Aventis and Bayer.

Patrick holds a Master of Science in Agronomy from AgroParisTech and an MBA from INSEAD, France.

Picture of Ralph Hedel


Chief Commercial Officer

Ralph Hedel

Chief Commercial Officer

Ralph Hedel is Chief Commercial Officer at Demeta since April 2018.

Prior to this, Ralph has worked since 1991 in various industries and more particularly in the field of performance materials.

For twelve years, Ralph led the sales and marketing activities of TELENE SAS, global leader in the segment of DCPD based resin systems. In the period, sales volumes have more than doubled and, together with his team, Ralph has opened new markets for the company : Russia, Brazil, India, Turkey.

During the nine years before that, he held successively sales, sales management and plant management positions in the specialty packaging division of SCA (now DS Smith).

Prior to that, Ralph started his business development career at Usinor-Sacilor (now Arcelor Mittal), where he worked five years at the specialty steel division. Based in the United States, he opened the north-American market to the railway equipment daughter company VALDUNES, through commercial and technical partnerships with clients and local contractors still running today. 

Ralph graduated from IPAG Paris in 1990.

Picture of Sylvain Allain

Sylvain ALLAIN

Chief Operations Officer

Sylvain Allain

Chief Operation Officer

Sylvain Allain has been the Chief Operation Officer (COO) at Demeta since June 2018. He is responsible for the subcontracting chain, application developments, NexTene™ resins qualification and customer technical support.

Having graduated from the Ecole des Mines de Nancy, Sylvain started his career path at Automaxi International where he used to design and engineer accessories for automotive market. During this period, he also developed a production unit in eastern Europe.

Then Sylvain joined Telene SAS, leader in the field of DCPD resin systems, where he was the Deputy Technical Manager for 9 years. He was in charge of application development, customer support from preliminary projects until the serial production and he used to manage the testing and material qualification team.



Head of GreenCARE

Dr. Vincent Escande

Head of GreenCARE LabCom

Vincent Escande holds a PhD in organic chemistry from the university of Montpellier. Before joining Demeta, Vincent worked as researcher in sustainable chemistry for Chimex (L’Oréal group, collaboration with CNRS). Vincent spent one year as research associate in the Center for Green Chemistry & Green Engineering at Yale University (USA), in Prof Paul Anastas’ group. Vincent’s research interests focus particularly on catalysis for green chemistry, with a production of 25 scientific research articles and 16 patent applications. Within Demeta, Vincent oversees the team of the GreenCARE project whose goal is the development of innovative products and processes related to sustainable oxidation of organic molecules.


Picture of Anthony Thévenon


Chief Technology Officer

Dr. Anthony Thevenon

Chief Technology Officer

Anthony Thevenon is Chief Technology Officer at Demeta since September 2020.

After completing a PhD in Polymer Physics at the Claude Bernard University on the modeling of thermoplastic morphology/thermomechanical behavior under elongation relationships, Anthony has worked on sizing formulations for basalt fiber composites for aerospace applications.

Anthony joined the Hutchinson’s Research Center in 2014, where he began as a project manager. He developed high performance thermoplastics and thermoplastic vulcanizates for automotive, aerospace and oil and gas applications using rubber technologies and reactive extrusion. Three years later, in 2017, Anthony was promoted Thermoplastic Laboratory Manager in the Hutchinson’s Research Center and managed a team of 35 persons (Technicians, Engineers, PhDs) in charge of high performance TP/TPV research and development for Hutchinson markets (automotive, aerospace, oil & gas).

Anthony graduated with a Materials Engineer’s Degree from Polytech Lyon and Innovative Materials Master’s Degree from UCBL in 2008.


Board of Directors

  • Dominique BOUVIER (Chairman of the Board)
  • Dr. Frédéric CAIJO
  • Dr. Lionel LIMOUSY
  • Dr. Philippe POULETTY
  • Serge RATTON
  • Dr. Didier ROUX
  • Vincent TOURAILLE

Scientific Advisory Board

DEMETA’s Scientific Advisory Board comprises 7 high-profile scientists who meet during regular plenary sessions or on ad-hoc basis in order to advise and guide DEMETA’s Board of Directors, Executive Committee and Researchers.

  • Dr. Jacques BITON
  • Pr. Janine COSSY
  • Dr. Michel DURY
  • Pr. Yves GROHENS
  • Dr. Patrick JAMES
  • Pr. Ludwik LEIBLER
  • Serge RATTON