The German conductor, Harald Nickoll, studied at the Musikhochschule Rheinland, specialising in choir and orchestra conducting, guitar and gamba as well as the piano accompaniment and singing. In 1983 he created the Kammerchor Carmina Mundi e.V. Aachen (chamber choir Carmina Mundi Aachen).
After finishing his training, Harald Nickoll took in January 1986 the direction of Musikschule Neukirchen-Vluyn. Apart from his commitment for Carmina Mundi, he created and leads several children choirs as well as various amateur choirs. In addition he led the Niederrheini Vocalensemble Duisburg until 1994. Since autumn 1991 he is a music head master at the Kreis Neuss, where he took over also the direction of the Jugendsinfonieorchesters (young symphony orchestra). Moreover, he is founder and director of the Grevenbroicher Kammerorchester as well as director/conductor of the Aachen's vocal ensemble "Collegium Byzantinumô.
From 1997 to 1999 Harald Nickoll led the operating phase of the Arbeitsgemeinschaft Ostbelgischer Chorleiter (working group of East-Belgian choir directors) in Födekam of the German-language community in Belgium. His main concern for many years with sounding and oscillation phenomena, such as sounding rising up ability, sound density, tone qualities and sound transmission. Those qualities are applied constantly in his choir, and co-ordinated in co-operation with Sabine Gross, who helps him to train the choir.
Since 2011, he is director of the music school of the city of