 Dellal has collaborated with many ensembles and appeared in many festivals throughout her career, including the Boston Early Music Festival, Aston Magna, and the Musicians of the Old Post Road.In opera, she appeared as Dido in Purcell's "Dido and Aeneas", as Bradamante in Handel's "Alcina", in Mozart's "La Clemenza di Tito" as Sesto, in his "Così fan tutte" as Dorabella, as Lucretia in Britten's "The Rape of Lucretia", as Erika in Barber's "Vanessa", and as Paulina in John Harbison's "Winter's Tale" after Shakespeare's play.In concert, she appeared at the Kennedy Center first in Bach's Mass in B minor, conducted by Julian Wachner.