Caitlin Hulcup made her European debut at the Wiener Staatsoper as Enriquetta I Puritani and has since appeared at leading opera houses internationally, including Royal Opera House London, Bolshoi Theatre Moscow, Deutsche Staatsoper Berlin, Theatre an der Wien, Theatre des Champs Elysees, Maggio Musicale Fiorentino, Bayerisches Staatsoper Munich, and Palau de les Arts Valencia. ​​

She appears regularly in oratorio, concert and Lieder recitals and has a broad operatic repertoire that features major roles by Handel, Mozart and Strauss. Caitlin sang with Zubin Mehta in Valencia and Florence, as Donna Elvira: Don Giovanni and as Octavian: Der Rosenkavalier. She has also appeared as Octavian in Moscow with Vassily Sinaisky and in Beijing with Sebastian Lang Lessing. As Rosina: Il Barbiere di Siviglia, Caitlin sang at the Wiener Staatsoper with Yves Abel and with Jean- Christoph Spinosi. She debuted as Sesto, La Clemenza di Tito in Taipei and performed Idamante: Idomeneo with Tobias Ringborg for Garsington and in Lisbon at Teatro Nacional de Saõ Carlos with Christian Curnyn. She sang as Iseult: Le vin Herbe by Frank Martin for Welsh National Opera and as Penelope: Il Ritorno di Ulisse in Patria for Royal Opera Covent Garden with Christian Curnyn. Caitlin debuted as Fricka Die Walküre at the Esplanade Singapore with OMM in 2019. She was featured in the live Digital Concert Hall broadcasts of the Oxford Lieder Festival 2020 with Sholto Kynoch and Jonathan Stone and performed live at the inaugural Liedfest Berlin Oxford concert in 2021. 

Concert engagment highlights have included Beethoven's 9th Symphony with Gustavo Dudamel in Venezuela, Mahler’s Knaben Wunderhorn at the Sydney Opera House with Mark Wigglesworth, Mahler's Das Lied von der Erde for Noord Nederlands Orkest with Martin Sieghart, Mozart’s ‘Great’ Cmin Mass with Jeremie Rhorer in Hamburg and Beethoven's Missa Solemnis with Martin Haselböck and the Wiener Akademie. She sang Mahler's 2nd Symphony both in Singapore and with the SSO under David Robertson, Mahler's 8th Symphony in Scotland with the RSNO under Peter Ounjian and Elgar's The Dream of Gerontius in Newbury Festival.

Caitlin has performed with leading early music conductors including René Jacobs (Diana/Il Destino: La Calisto at La Monnaie in Brussels), William Christie (Cyrus: Belshazzar at Salle Playel and Barbican), Christian Currnyn (Aristeus: Orpheus in ROH production by Keith Warner) and Alan Curtis (Ariodante in Braunschweig, Cesare: Catone in Utica at Theatre des Champs Elysees and Alceste: Admeto in Theatre an der Wien). She has performed as Orfeo in Gluck's Orfeo ed Euridice with Kenneth Montgomery and in Finnland with Fabio Biondo as Ariodante with Nicholas Kraemer, Dido Dido and Aeneas with Richard Egarr and the Academy of Ancient Music at the Barbican. Commercial CD releases include Arbaces: Artaxerses for Linn Records with Ian Page, Vivaldi's Griselda and Irene Theodora for Pinchgut Opera conducted by Erin Helyard, Iphigenie en Tauride with conductor Anthony Walker and Calbo: Maometto II with David Parry.

During her performing career Caitlin established a reputation as a fine singing teacher and is now also a professor of voice at the Universität der Künste Berlin. See Teaching for more information.