He graduated summa cum laude with Mr. Forestiere (Conservatory N. Piccinni, Bari), as well as with Mr. Peter Sadlo (Mozarteum Salzburg).
In 1999 he met H. W. Henze in Munich, working on the Maestro's chamber opera "El Cimarrón". Several performances of the piece followed: in Salzburg (Salzburger Festspieleröffnung, Festival Aspekte), Tübingen (Kammeroper), Monopoli (Conservatory), Hallein (Junge Kultur), Hamburg (NDR), Nürnberg (Theater Nürnberg).
He has played many first performances of composers such as: Stefano Taglietti, Stefan Hakenberg, Agustín Castilla-Ávila, S.E. Panzer, and Balz Trümpy, performing their works at the Teatro civico in Sassari, Sardinia, at the Theater Konstanz, at the Sommertheater Überlingen, at the Festival "Sommer im Altmühltal" in Ingolstadt, at the Mozarteum in Salzburg, at the Romanischer Sommer Köln, at the Festival Mammut Glyphix in Salzburg, at the California State University in Fresno, at the festival “Les arts florissant de la Sardaigne” in Paris, as well as at the Festival for Contemporary Music in Banska Bystrica, Slovakia. In 2008 he debutated as a soloist at the Gasteig in Munich.
Since 2003, Ivan Mancinelli is being frequently invited as a guest percussionist by the RAI Symphony Orchestra in Turin. In the same year his essay "Cello Suites, dal Violoncello alla Marimba", (Cello Suites - from the Violoncello to the Marimba) has been published by the Italian “Edizioni Pugliesi” - Martina Franca. In 2006 his solo CD with Bach's 6 Suites for Cello, transcribed for Marimba, was published by Bongiovanni Records Bologna. In 2007, Hans Werner Henze's El Cimarron has been released by the Label Wergo. In 2008, his duo CD (guitar and marimba) together with the guitarist Christina Schorn has been released by Bongiovanni Records. In the same year the El Cimarron Ensemble brought out their new CD “Hakenberg/Taglietti” with the new label VDMRecords.
Since November 2005, Ivan Mancinelli is teaching at the Conservatory in Sassari, Sardinia. He plays exclusively on Adams Musical Instruments