Petros Sapountzakis was born in Piraeus in 1971. He works as a primary school teacher for the last 17 years. Having theological concerns, he attended the Higher Ecclesiastical School of Athens and associated with the anti-heretical struggle of the Greek Church and other church activities. When he entered the Primary Education Department, he got interested in new territories. From 1995 to 2008, he organized the child mountaineering camp "High Mountains" and since 2009, he deals with issues of Sexual Orientation, Gender Identity and Gender Characteristics in Education. He is one of the founding members of Rainbow School.