Prof. Spahr is the Director of Oral Rehabilitation and Head of the Discipline Periodontics, as well as Deputy Head of School at The University of Sydney Dental School. 

Prof. Spahr is the former Head of Periodontics at the University of Ulm in Germany and has also worked at various international universities and research facilities. He has additional training in microbiology, molecular biology, extensive experience in basic science research, animal research and clinical research. His research interests include periodontal regeneration, bone regeneration, periodontitis and systemic diseases, antimicrobial therapy as well as dental implants and peri-implant diseases. He has led large externally funded research projects and is collaborating with leading international research groups and companies in the field of periodontology, implantology and bone regeneration. He has authored numerous publications in international peer-reviewed dental and medical journals, book chapters, and has presented his work at professional conferences worldwide. 

Prof. Spahr is a board registered periodontal specialist, working part-time in an established specialist periodontal and implant practice in Sydney and is the past President of the Periodontal Research Group of the International Association of Dental Research (IADR). He is a Fellow of the International Team for Implantology (ITI), the International College of Dentists (ICD), and the Pierre Fauchard Academy (PFA).