Who we are

CATS Consultants has been co-founded by Dr. Claudia Fruijtier-Pölloth and Adriaan Fruijtier.


Claudia Fruijtier-Pölloth has been an independent toxicology consultant since 2001. She has graduated as a M.D. (Dr. med.) and obtained a M.Sc. degree in Chemistry at the University of Ulm, Germany. In addition she is a Certified Toxicologist (German Society of Pharmacology and Toxicology), registered in the European Registry of Toxicologists.

Before founding her own company, she has worked as a scientific advisor for the International Detergents Industry Association, A.I.S.E., in Brussels, Belgium. Between 1997 and 1999 she has gained regulatory experience at Fujisawa GmbH in Munich, Germany, as Manager Regulatory Administration and Compliance. She had joined Fujisawa from BASF AG, Ludwigshafen, Germany, where she has held various positions, including Head of the Acute and Dermal Toxicity Laboratory, Head of the Project Coordination Group, Head of the In Vitro Methods Laboratory, Head of the Bioanalytics Laboratory. In her period at BASF, she has also gained extensive experience in toxicological evaluations.

Before joining BASF in 1990, she has also gained experience in medical practice as a resident in Internal Medicine/Cardiology/Nephrology at the University of Munich School of Medicine, Munich, Germany.


Adriaan Fruijtier has graduated as a pharmacist at the University of Utrecht, The Netherlands. Until March 2004 he has been Head of the Oncology Group within Global Regulatory Affairs at Bayer AG, Wuppertal, Germany, and Bayer Corporation, West Haven, CT, USA. Between 2001 and 2003 he was Director of Regulatory Affairs at Micromet AG, a biotech company in Munich, Germany. Prior to joining Micromet, he has worked during four years as a Project Manager for Oncology Projects at the European Medicines Agency in London, United Kingdom.

He joined the European Medicines Agency from Novartis AG, Basel, Switzerland, where he was Regulatory Affairs Project Manager in the Oncology group in 1996 and 1997. Before 1996 he was Head of Drug Regulatory Affairs for six years at Ciba-Geigy in the Netherlands and has worked as Manager Regulatory Affairs at Glaxo, also in the Netherlands.