Bertrand de CASTELNAU

Chief Executive Officier

Aged 58, Bertrand de CASTELNAU has more than 25 years of experience in the field of diagnostics. He began his career as a Commercial Attaché in Islamabad, Pakistan. He then joined Roche in Switzerland, as a Corporate Auditor before moving to the Diagnostics division and then taking charge of the Asia-Pacific region for Roche Diagnostics, based in Singapore. Bertrand went on to become Chief Operations Officer at Guerbet for four years, before spending 10 years as Chairman of the Horiba ABX Group and leading the Horiba Medical division. Finally he joined DiaSys as CEO, head of Marketing, Sales and Finance. A fluent speaker of several languages, he holds an MBA from the École des Hautes Études Commerciales (HEC) and a law degree from Paris.


Theranostic Business Unit Director

Simon DAVIERE holds an engineering degree in biotechnology from Compiègne University of Technology (UTC) and a Master’s degree in Biotechnology from Lille University of Technology. He has a solid professional experience of more than 10 years in the in vitro diagnostics industry and personalized medicine, particularly in the field of chronic inflammatory diseases. He started his career at EUROIMMUN before joining Theradiag where he held several managerial positions in marketing and medico-marketing before managing the Theranostics Business Unit.


IVD & Services Business Unit Director

Sylvain LECOMTE holds a Master’s degree in biotechnologies and biochemistry engineering projects. He has an experience of 14 years in the In Vitro Diagnostic business at different positions in sales, technical and marketing positions. He worked for EUROIMMUN and WERFEN before joining Theradiag in 2013. He is now managing the IVD Business Unit and the After Sales Services.

Léa Bureau-Mantelet


Manufacturing Director

Léa BUREAU-MANTELET holds an engineering degree in biotechnology from Compiègne University of Technology  (UTC), she joined Theradiag 8 years ago. After a strong experience as system application specialist for Lisa Tracker kits and then at the head of Quality Control, she is now in charge of the production department. She is responsible for every step of production and for the whole supply chain.


Chief Financial Officer

Philippe CECCALDI is a graduate of the Paris Institute of Political Sciences (Sciences Po) and holds a Master’s Degree in Business Law. Financial director and later Chief financiel officer in several companies belonging to various industries (pharma , chemicals, materials) and in business services for twenty years. After starting his professional career in a Big Four audit firm (Coopers & Lybrand) and a few years in Lafarge in Asia , he contributed to the development of subsidiaries of French and Anglo-Saxon groups listed or held in Private Equity.  At Theradiag he supervises the finance, HR and IT functions.