 She became a regular at the Met during the 1980s and 1990s, appearing as Jocasta in "Oedipus rex", Suzuki in "Madama Butterfly", Isabella in "L'italiana in Algeri", Federica in "Luisa Miller", Fidès in "Le prophète", Frugola in "Il tabarro", Mother Marie in "Dialogues des Carmélites", Louis XV Chair in "L'enfant et les sortilèges", the Princess in "Suor Angelica", Ulrica in "Un ballo in maschera", and Serena in "Porgy and Bess".Her 101st and last performance at the Met was in a concert performance of Verdi's "Requiem" in 1997 where she sang the mezzo soprano solos under the baton of James Levine.Quivar's other opera credits include performances at the Deutsche Oper Berlin, Bavarian State Opera, La Scala, Teatro la Fenice, Teatro dell'Opera di Roma, the Theatro Municipal in Rio de Janeiro, Teatro Colón, Royal Opera at Covent Garden, Houston Grand Opera, Seattle Opera, and Los Angeles Opera among others.