Nektarios Mitropoulos was born in Athens in 1966.
He attended piano lessons in the class of Eleni Heindeberger at the Hellenic Conservatory. He studied advanced theory (Harmony, Counterpoint, Fugue) at the National Conservatory of Athens, as well as Composition in the class of Theodoros Antoniou at the Central Conservatory, where he received his diploma with honors.
He has taught compulsory and advanced theory in many conservatories and private schools and has prepared many students for admission into music schools.
From 1996 until today, he has been working with many music organizations for the copying, curation, correction and publication of musical material, mainly symphonic music, as well as chamber music (such as Orchestra of Colors, Manolis Kalomiris Association, State Orchestra of Athens, Symphony Orchestra of the Municipality of Athens, Ionian University), while he collaborates with orchestra director and composer Nikos Christodoulou on copying, editing, correcting and publishing musical material of the symphonic work of Nikos Skalkotas.
He has composed music mainly for the theater and works for chamber ensembles. Many of his works for small ensembles have been presented by, among others, the "Hellenic Contemporary Music Ensemble" and the "Athens Saxophone Quartet".
Since 2011 he has been a professor at the Philippos Nakas Conservatory.