Nikolaos Katsoulis was born in Alexandroupoli in 1971. He started practicing harmonium at the age of 14. Two years later he turned on piano studies while he simultaneously started attending music theory. He graduated from the United Multifield Lyceum of Alexandroupolis in 1988, while a year later, in 1989, he obtained a degree of the Specialty Field as a social Caretaker.

He studied at the Macedonian School of Music of Thessaloniki, where he obtained a Harmony Degree in 1992 under the supervision of his professor Dr Dimitri Athanasiadi, while a year later he also obtained an Orchestration Degree supervised by Dr Theodor Zariba. He simultaneously completed his studies on the field of Music Pedagogical Education at the Contemporary School of Music of Thessaloniki. He also attended flute courses at the Public School of Music of Alexandroupolis. From 1993 to December of 1994 he served his country as a fluter of the Military Band of the XII Division of Alexandroupolis.

In 1995 he taught music in Nipsa of the Municipality of Traianoupolis as an instructor of the Public Educational Committee of the Prefecture. In 1999 his first CD, called “White Roses”, came out and soon after that, in 2000, his second personal CD called “Soundcolors” was also put out. Three years before that, he participated in the setting up of the Musical Association of Alexandroupolis.

In 2000 Katsoulis obtained his Counterpoint Degree under the supervision of Dr J. Ioannidis, while two years later he succeeded in taking his Fugal Degree at a high pass. He is currently continuing his flute studies.

In 2000 he participated in a sound-recording of a CD for the “Child’s Smile” Association, while in 2006 he took part in a sound – track of the play “The house of Fernalda Alba” of Frederico Garthia Lorka and in 2008 of the performance “the Bacchae” of Euripides directed by Nikos Zervopoulos and orchestrated by Vaggelis Mammos. Since 1996 he has been teaching Harmonium and Music Theory at the School of Music “Phaethon” in Alexandroupoli. He has also participated in a variety of concerts either as a chorus member or as a fluter.

During the school year 2003–2004 he was hired by the Primary Education as an hourly Music Teacher in the 3rd Primary School of Feres, while during the next two school years he worked in the Primary School of N. Hili and Maistros as well as in the 3rd Primary School of Alexandroupolis.

In 2006 he successfully completed the writing of the universal electronic classical music composers dictionary of the era from 800 AD to nowadays. Since 2008 he has been the leading musician of the Municipality of Feres.

In January of 2009 he obtained his Composition Diploma at a high pass under the supervision of Dr Athanasio Trikoupi. During the same year he created an innovative music composition system of the name of “Oktapus” (http://www.youtube.com/watch?v=V0TXUX9pMpA).

In April of 2010, his composition “Soundwaves” was performed by the New Music Ensemble of the University of Lakehead in Ontario, Canada.