She has performed with many leading opera companies and orchestras in the United States and Europe, collaborating with such notable conductors as Plácido Domingo, James Conlon and Miguel Harth-Bedoya.
[7] That same year she performed the role of the Beggar Woman in Stephen Sondheim's Sweeney Todd with the Wolf Trap Opera Company and Bubikopf in Viktor Ullmann's Der Kaiser von Atlantis with the Chicago Symphony Orchestra at the Ravinia Festival.
In 2006 she made her debut with the Los Angeles Opera as Amore in L'incoronazione di Poppea and returned to the LAO later that year to create the role of Dragonette in the world premiere of Elliot Goldenthal’s Grendel and portray the Celestial Voice in Don Carlo.
[8] In 2008 Alattar returned to the Ravinia Festival in Chicago to portray Konstanze in Mozart's Die Entführung aus dem Serail and made her debut with Palm Beach Opera as Gilda in Verdi's Rigoletto.
She returned to the ENO in 2010 to play the lead role, Leila, in Georges Bizet's early opera The Pearl Fishers, in an updated production directed by British film-maker Penny Woolcock.