EXPERTOX is under the presidency of Dr. Stephane PIRNAY. Dr. Stephane PIRNAY holds a doctorate in pharmacy and a PhD in toxicology, an expert in toxicology at the Paris Court of Appeal, Laureate of the National Academy of Pharmacy and a Laureate of Paris V University, a member of the working groups at The European Commission, and also Eurotox certified.

He is also responsible for teaching at the Faculty of Pharmacy, Paris V. His executive assistant is Johanna MARKEZANA. EXPERTOX is composed of 10 teams composed of a scientific staff: pharmacists, engineers in biology, chemistry, security and computer technologies, as well as administrative (assistants and accountants) and commercial staff.

The teams are divided between the firm (Regulatory Affairs, Toxicology Expertise, Quality Assurance), and the laboratory.