Professor Donos was awarded the Specialisation Degree in Periodontology and the Master of Science (M.S) Degree in 1994 as well as his PhD in Guided Bone Regeneration 1998 from the Royal Dental College, University of Aarhus, Denmark. Following his military service as a Specialist in Periodontics at the Airforce General Hospital, Athens, Greece, he was appointed as Clinical Lecturer in Oral Surgery, University of Aarhus, Denmark. He then received the ITI Fellowship at the Department of Periodontology & Fixed Prosthodontics, University of Berne, Switzerland. Prior to his current appointment as Professor/Hon. Consultant, Head & Chair of Periodontology at UCL Eastman Dental Institute & Hospital, he held the post of Lecturer and Senior Lecturer in Periodontology at the UCL Eastman Dental Institute. 

Professor Donos has published extensively in leading peer-reviewed journals in periodontology, implant dentistry and in the field of periodontal/bone regeneration and he is a member of the editorial board of the Journal of Clinical Periodontology and Clinical Oral Implants Research. Furthermore, he is a member of the abstract review panel of the Periodontal Research Group of the IADR. Professor Donos is actively involved in the field of implant dentistry where, on a national level, he is the Director of the ITI Scholarship Centre at the UCL Eastman Dental Institute.Furthermore, he has been involved in the development of advanced implant dentistry modules at the Eastman CPD (GBR & soft tissue management). His research activity is in the field of periodontal/bone regeneration and osseointegration where he has secured a number of research grants some of which are from the ITI Research Foundation in Switzerland.