Our team

Dr.med. Steffen Karl Geiger
Specialist in occupational medicine, Traffic medicine specialist SGRM, Medical examiner Federal Office of Transport, Medical examiner Federal Office of Civil Aviation (Aeromedical Examiner AME), Designated Aeromedical Examiner (DAME) Civil Aviation Safety Authority of Australia (CASA), Medical examiner Swiss Maritime Office (SSA)

Additional designations (Germany): Sports medicine, Naturopathy, Lead emergency physician

Chief Executive Officer and Chairman of the Board of Directors
Head of specialist medical training
Leading Trainer of First Responder Instructors
steffen.geiger@azbasel.com   

Dr.med. Willi H. T. Rühl
Lecturer at the Medical Faculty University of Basel,
Physician with recognition level 2 (street)
info@azbasel.com

   

Dr.med. Nasrin Schäfer
Specialist in occupational medicine, Medical officer at the Federal Office of Transport,
Physician with recognition level 2 (street)

Additional designation (Germany): Emergency physician

Senior physician
Deputy head of specialist medical training
nasrin.schaefer@azbasel.com

Assistant physician (hospital care)
(since 01.07.2025)

Assistant physician (occupational health)
(starting 01.10.2025)

Petra Geiger
Medical technologist for laboratorary analysis MTL (Germany)
Authorized representative and Member of the management

HR and Financial management
Customer service

Specialist in laboratory diagnostics
Quality manager laboratory
petra.geiger@azbasel.com 

Nathalie Schiliro
Medical assistant (Germany), Certified Health and Social Services Specialist,
Certified Quality Management Representative (Germany)
Team leader for practical assistance

IT and data protection officer
Security officer (technical facility)
azb@azbasel.com

Sarah Scheffler
Medical assistant (Germany)
Deputy Team leader for practical assistance

Occupational medicine practice assistant
QC-Manager (Laboratory)
Security officer (technical Equipment)
azb@azbasel.com

Catherine Declercq
Medical Secretary (CH), Master of Public Health
Administration & Practice assistance

Hygiene officer
Nutrition expert
azb@azbasel.com

Astrid Deville
Internationally certified Coach, Comunication trainer, Leadership trainer, Language teacher
Expert in personnel training & personnel development
info@azbasel.com

Andrea Wittenbecher
Physiotherapist, Orthopedic back school leader according Brügger
Physiotherapeutic workplace consultant
info@azbasel.com

Kerstin Riesterer
Qualified paramedic SRK, ACLS/ PALS/ BLS instructor
First Responder Instructor
info@azbasel.com

Marc Bachmann
Emergency paramedic, Instructor for first aid at medical practices
Co-Trainer for First Responder Instructors
First Responder Instructor
info@azbasel.com

Stefan Lutterschmidt
Paramedic IVR/SRK-HF
First Responder Instructor
info@azbasel.com

Tanja Arpagaus
Certified instructor for emergency response and BLS/AED
First Responder Instructor
info@azbasel.com