He holds a Master in Science Education (2006) and a PhD in Environmental Science Education (2010). Since 2009 he is a School Advisor in Primary Education. During his career Dr. Mandrikas gained great experience in Environmental Education. During 1994-2001 he has implemented five Environmental Education school programmes, while between 2001-2004 he was a trainer in 200 daily training programs of Environmental Education for primary and secondary education students provided by ACEE. He was a trainer in 15 educational seminars for educators in Environmental Education provided by ACEE (2001-2004). He was a trainer in 18 educational seminars titled “Training of Teachers and Educators of Environmental Education” organized by the National Technical University of Athens (2007-2008).