Born in Athens, Leonidas Dimitriou graduated as a dental technician in 1986 and continued his studies at the Department of Dental Technology at the Technological Educational Institution of Athens. Over the years, he has attended numerous leading dental seminars and, since 1993, has been the owner of the DENTECH dental laboratory. In 2015, he also became a laboratory co-operator at the Department of Dental Technology, Technological Educational Institute of Athens.

Passionate about education and knowledge transfer, Leonidas has been an official Noritake instructor and speaker since 2017. In 2018, he began teaching ceramics and fixed prosthodontics at the University of West Attica, Department of Dental Technology. More recently, he has organized courses on Noritake ceramic materials and lectures regularly at international conferences and seminars.