Born 1963 in Bratislava. Studied composition in Bratislava from 1988--1996 at the ISCM Composer’s Workshop in Dolny Kazimierz (Poland) with L. Nono, L. Ferrari and others. He completed various postgraduate composition studies at Conservatoire National Supérieur in Paris; Koninklijk Conservatorium in The Hague (with L. Andriessen); at AMD in Bratislava (with Juraj Bene_); at Dartington Summer Music School (with T. Wishart and R. Worby); and completed a "composer-in-residency" within the DAAD programme in Berlin in 1995--1996. In 1987 he was a founding member of the Veni ensemble and was artistic director of the Evenings of New Music Festival. His work has been broadcast regularly on Radio Ragtime (New Music Studio), and he currently performs with the Veni ensemble, Vapori del Cuore, Appendix Consort and others. Matej has worked with visual artists such as M. Hnat, J. Raska, P. Rovensky and D. Sadovská and with choreographers M. Poláková and B. Young. He composes for Veni ensemble, Arcana Ensemble, Hilliard Ensemble, Slagwerkgroep den Haag and others; and leads Mi - 65 group with Carsten Seiffarth. His music has been performed and broadcast internationally. Lives in Bratislava.