General Manager


Head of R&D

Head of QA/RA

Head of Finance and Administration


Lukas Quidenus

Lukas joined ANTITOXIN in 2019 following a career in pharmaceutical and IVD industry. He holds a Master of Science degree in molecular biology from Vienna University.

Prof. Dr. Egon de Groot

Egon is managing our operational activities and supports our in-house R&D activities.​ Before joining ANTITOXIN he was leading research groups at Max-Planck-Institute (Cell Biology). He is part of our team since 2014.

Dr. Ziyad Abdallah

Ziyad is leading the development projects of our customers and our own in-house R&D since 2010. Before joining ANTITOXIN he did research at the Institute of Transfusion Medicine of Charité Berlin.

Ina Kleen

Ina joined ANTITOXIN in 2007 following several years with Ortho Clinical Diagnostics in various positions including marketing within the blood transfusion business. She started her career as transfusion-medicine-specialized MTA in 1982.

Johannes Höfer

Johannes is responsible for finance, accounting and logistics since 2014. He holds an MBA degree of the University of Bamberg.

Dr. Ortwin Walla

After obtaining his PhD in Biology (Immunology) Ortwin joined ANTITOXIN in 1991 to lead the Quality Management Department. He was leading the company as CEO from 1998 to 2018 and is further supporting the company as a consultant following the generation change to the leadership of Lukas in 2019.