Editions of Baroque and bel canto operas prepared by Katz have been performed at the Metropolitan Opera, the Houston Grand Opera, and Opera Lyra Ottawa.
Ottawa | opera | Metropolitan Opera | University of Ottawa | Royal Opera House | Sydney Opera House | Vienna State Opera | San Francisco Opera | New York City Opera | The Phantom of the Opera (1986 musical) | The Threepenny Opera | Opera | Ottawa Senators | Doctors (soap opera) | Falstaff (opera) | Paris Opera | Ottawa River | Royal Swedish Opera | Opera Australia | Lyric Opera of Chicago | Boris Godunov (opera) | The Beggar's Opera | Tannhäuser (opera) | Santa Fe Opera | opera house | Houston Grand Opera | Zurich Opera | Opera North | Dallas Opera | English National Opera |
In 2002 he sang the title role in Verdi's Otello for the first time with Utah Opera, a role which he sang frequently over the next six years in such houses as the Teatro Arriaga, Hawaii Opera Theatre, Opera Ontario, Opera Lyra Ottawa, and the Manitoba Opera Association.