 Kreizberg also worked as an accompanist to vocal students and accompanied productions such as Theatre Opera Music Institute's 1981 production of Rimsky-Korsakov's "Mozart and Salieri".He accompanied and toured with Roberta Peters in the late 1980s.Kreizberg was General Music Director (GMD) of the United Municipal Theaters of Krefeld and Mönchengladbach from 1988 to 1994, where his work included a notable revival of Aribert Reimann's opera-oratorio "Troades", which the composer himself received enthusiastically.