Dr S.O. Koutayas is active member of the following scientific organizations:

International College of Prosthodontics
European Association of Osseointegration
German Association of Prosthodontics and Dental Materials
German Dental Association
Hellenic Academy of Esthetic Dentistry
Hellenic Prosthodontic Society
Hellenic Dental Alumni Freiburg
Corfu Dental Association

He is also a honorary member of the following scientific organizations:
Bulgarian Academy of Cosmetic Dentistry
Rhodian Academy of Advanced Dentistry

Finally, he maintains an affiliate status in the
European Academy of Esthetic Dentistry