He collaborated with several orchestras, festivals and theatres including Orchestra del Teatro di San Carlo (Napoli), Orchestra Giovanile Mediterranea (Palermo), Orchestra Roma Sinfonietta (Rome), New England symphonic ensemble (New York), Los Angeles Sinfonietta Orchestra (Los Angeles), Saint Petersburg Symphony Orchestra (Russia), Kiev Symphony Orchestra (Ukraine), Al-Bustan International Festival, Baalbeck International Festival, Byblos International Festival (Lebanon), Festival d’ile de France (Paris), Carnegie Hall (New York), Teatro dell’Opera di Roma (Roma), Teatro di San Carlo (Napoli), Académie de l’Opéra de Paris, Festival d’Aix-en-Provence (France), Romanian Radio (Bucharest), Al-Ain Music Festival (UEA), Bahrain International Music Festival (Bahrain).
He performed also with world-renowned artists such Maria Agresta, Jessica Pratt, Joyce El Khoury, Daniela Barcellona, Carmen Giannatasio, Laura Giordano, Maria Grazia Schiavo, Paolo Fanale, Giorgio Berrugi, Krzysztof Baczyk, Mirco Palazzi, Seong-Jin Cho, Dmitry Masleev, Jack Swanson, Anna Maria Labin, Eric Le Sage, Xavier De Maistres, Faycal Karaoui, Gabriele Ferro, Francesca Dego, Modigliani Quartet, Kodaly Quartet, Boris Andrianov, Alexander Ghindin, Caterina Di Tonno, Rosa Bove, Leonardo Cortellazzi and others.
He has been invited as a jury member to several prestigious competitions as the Ottavio Ziino International Liric Competition (Italy), Voce Verdiane International Competition (Italy) and the Biennale de quatuors à cordes (Philharmonie de Paris).
He collaborates with many Orchestras such as Lebanese Philharmonic Orchestra, Orchestra del Teatro di San Carlo, Orchestra Giovanile Mediterranea, Roma Sinfonietta, New England Symphonic Ensemble, Los Angeles Sinfonietta Orchestra, Saint Petersburg Symphony Orchestra, Kiev Symphony Orchestra, Romanian Radio Chamber Orchestra (Bucharest).
Maatouk published his new book on the Syro-Maronite tradition with Geuthner’s edition in Paris (France). Different articles are published in international musicology journals and 13 CD on the Maronite tradition with the Antonine University chorus.
Upcoming schedule includes Maatouk as conductor of the Radio Romania Chamber Orchestra, Jury member at the 21st edition of the Ottavio Ziino International Competition in Italy.