Dever made her Metropolitan Opera debut in 1994, as Amneris in Aida. Other roles at the Met include Azucena in Il Trovatore, Ulrica in Un Ballo in Maschera, Eboli in Don Carlo, and Fricka in Die Walküre (1993 Japan tour under James Levine).
She has sung at the Washington Opera, New National Theater (Tokyo), Michigan Opera Theatre, Teatro Lirico di Cagliari, Teatro Massimo (Palermo; Grand Reopening), La Scala, Vienna State Opera, Berlin State Opera, Teatro Colón, Arena di Verona, Virginia Opera, and the Cincinnati Opera.
She has performed with the State Symphony Orchestra of São Paulo, the Louisville Orchestra at Chautauqua, the Florida Philharmonic, the Israel Philharmonic Orchestra, the Pacific Symphony, the Netherlands Radio Orchestra and the National Orchestra of Mexico.
Dever sang at a Lincoln Center live concert telecast with Pavarotti and performed the role of Dalila opposite Plácido Domingo's Samson in 1998 (Mexico City).
- Rearick, Kristie. "Opera singer Barbara Dever to perform at Bunker Hill Music in Washington Township", South Jersey Times, November 5, 2014, updated January 17, 2019. Accessed January 10, 2021. "At home in South Jersey as well as the Met in New York City, mezzo-soprano Barbara Dever, a native of Pitman, will return to the area to sing for Music at Bunker Hill in Washington Township on Nov. 23 at 3 p.m., with Elena Ryepkina on piano."
- Williams, Victoria. "In a Class by Herself", Gloucester County Times, May 14, 2009, updated April 1, 2019. Accessed January 10, 2021. "Barbara Dever, as acclaimed for her commitment to community as she is to the international opera stage where she is an established diva, flies home to South Jersey Friday to receive just the sixth honorary doctorate in music in Rowan University history."
- "Diva Dever leads two lives". National Catholic Reporter. February 26, 1999.