Reba performed solo with the Zagreb Philharmonic orchestra, with the Croatian Chamber Orchestra and Zadar chamber orchestra. He also performed with many chamber ensembles (Cantus, The Zagreb String Quartet, The Porin Quartet, The «Arundo Donex» Clarinet Quartet, The «Crowind» Wind Quintet, The Varazdin Chamber Orchestra and The Croatian Chamber Orchestra).
Reba is a co-founder of the “Wind Octet ZF” and of the Septette «Ad libitum ZF» with which he has regularly performed. From 1997 he has been a full member of the Zagreb Philharmonic Orchestra and since 2001 its solo clarinettist. With the Zagreb Philharmonic Orchestra he toured Europe, Japan and Mexico and has co-operated with many world famous conductors and soloists. Reba represented Croatia as a member of the World Philharmonic Orchestra in Paris in 2006.
Reba is an assistant professor at the Academy of Music in Zagreb. He has held regular summer seminars in Medulin (the Istria) and Pucišca (the island of Brac). Reba is one of the founders of the Croatian Clarinet Society.