Marianthi Stamadianou graduated from Molaoi Lakonia Lyceum and was admitted to the Athens University Law School.

After having successfully completed her undergraduate studies she continued with a postgraduate degree in Civil Law. Concurrently, she completed her apprenticeship in Emporiki Bank, at the Department of compulsory executions and auctions.

As a lawyer, she worked with major law firms dealing with civil and family law cases, while she also served as a member of the Financial Disputes Resolutions Committee of the Greek Football Federation.

She was appointed notary after having successfully participated in the 2016 exams.

She speaks both English and German fluently.