a product of red star football academy, during his professional career he played for numerous clubs in yugoslav first league and yugoslav second league. after the break-up of yugoslavia, he moved to turkey, where he played for samsunspor, before returning to serbia in 1994. since retiring as a player in 2000, kljajić worked as a manager with several serbian clubs, including mladenovac, big bull, morava ćuprija, srem and novi pazar. currently, he is the manager of bežanija.