Received his degree in Dentistry in 2000. He has been awarded an MSc in Implant Dentistry and Diploma in Aligners by The City of London Dental School and University of Bolton.  He has been Clinical Director on The City of London Dental School since 2021.

Dr Petousis has attended many post-graduate courses and is continually developing his skills. He is currently learning the latest Implant techniques and perfecting his current methods of treatment in contemporary dentistry through education. 

He has worked in many dental clinics in various settings across Athens, London, Dubai treating patients with diverse dental needs. He has a distinct interest in smile design, teeth whitening, crowns and bridges, veneers, cosmetic resin bonding but especially in dental implants. He stated his interest regarding aspects of clinical negligence, ethics and consent, ensuring patients at the practice get the best health care service available. Dr Petousis is passionate about dental implants and always wants to share his knowledge and his experience with his colleagues.