Marios together with his brother Polis they are ex amateur boxers that had represented Cyprus in European and World Championship through out their teen age. After completing their service in the Navy Seals, they both studied Health and Physical Education for 4 years and graduated from North East Louisiana University, USA in 1993 and 1998 respectively, specialized in boxing.
In combination with their studies they continued boxing in state competitions taking part in large tournaments such as Golden Gloves, ABF, Silver Gloves etc. Not only they were trained for the competitions but they also helped and coached several well-known athletes of Louisiana, giving them the chance to gain great experience as personal trainers and taking part in coaching and referee seminars.
During his boxing career (as a boxer and a coach) in the States, Polis was able to be trained and coach various amateurs and professional boxers (Jeff William, Glen Modicue) and World Champions (Adolfo Washington IBF Cruiserweight Champion, Richard Savage Featherweight IBS World Champion).