MacWatters sang at the New York City Opera from 1946 to 1951, in The Pirates of Penzance (as Mabel, conducted by Julius Rudel), Rigoletto (as Gilda, with Giuseppe Valdengo and Luigi Infantino), Il barbiere di Siviglia (as Rosina, opposite Enzo Mascherini), The Old Maid and the Thief (as Laetitia, with Marie Powers), Le nozze di Figaro (as Susanna), Les contes d'Hoffmann (as Olympia), and Ariadne auf Naxos (as Zerbinetta).
Giuseppe Garibaldi | Giuseppe Tornatore | Giuseppe Sinopoli | Giuseppe De Santis | Giuseppe Capogrossi | Giuseppe Terragni | Giuseppe Mazzini | Giuseppe Ungaretti | Giuseppe Lignano | Giuseppe Tucci | Giuseppe Radaelli | Giuseppe Pizzardo | Giuseppe Morello | Giuseppe Marchese | Giuseppe Guarneri | Giuseppe Di Cristina | San Giuseppe Jato | Rima San Giuseppe | Giuseppe Valdengo | Giuseppe Tomasi di Lampedusa | Giuseppe Soleri | Giuseppe Sergi | Giuseppe Quaglio | Giuseppe Piazzi | Giuseppe Patroni Griffi | Giuseppe Parini | Giuseppe Mosca | Giuseppe Greco | Giuseppe Giusti | Giuseppe Farina |
The tenor sang regularly in Naples and Bologna, and made guest appearances at the New York City Opera in 1947: La traviata (with Enzo Mascherini as Giorgio), Rigoletto (opposite Giuseppe Valdengo and Virginia MacWatters), Madama Butterfly, La bohème, Il barbiere di Siviglia (conducted by Julius Rudel) and Don Giovanni.