Born in Dublin, Ireland, the Irish soprano, Sinéad Mulhern, studied at The Juilliard School in New York and The Curtis Institute of Music in Philadelphia, finishing her training as a Young Artist at the Centre de Formation Lyrique at the Opéra National de Paris. In 1998, Sinéad was a National Finalist at the Metropolitan Opera National Council Auditions.

Sinéad made her debut at the Opéra National de Paris in 1998 while a Young Artist there. She appeared in Rigoletto, Le Nozze di Figaro, Lulu and La Traviata. She also sang Adina in l’Elisir d’Amore and Fiordiligi in Così fan tutte at the Toulon Festival. While a Young Artist at the Centre de Formation Lyrique, Sinéad was the winner of the 1999 Cercle de Carpeaux Prize, the 2000 AROP prize and was a prize-winner at the Concours International de Paris.

In 2000, Sinéad made her debut at the Theâtre du Châtelet in Paris as Sifare in Mozart’s Mitridate, she was subsequently engaged to sing the same role in the Graham Vick production at the Sydney Festival in Australia. This was followed by her debut with the Glyndebourne Touring Opera as Countess in Le Nozze di Figaro (Graham Vick) and Tatyana in Eugene Onegin with the Nationale Reisoper in the Netherlands. She then appeared as Lucio Cinna in Mozart’s Lucio Silla in a co-production between Opéra de Lausanne and Opéra de Caen, Lauretta in Gianni Schicci (Robert Carsen) at De Vlaamse Oper in Belgium and First Lady in Die Zauberflöte with Marc Minkowski at the Montpellier and Perpignan Music Festivals, a role that she has since sung at Leipzig Oper.

In 2002, Sinéad made her debut at the Komische Oper Berlin as Asteria in Tamerlano (David Alden) followed by Infantin in Zemlinsky’s Der Zwerg. In 2003, she became a member of the Ensemble at the Komische Oper where she has sung Zerlina in Don Giovanni (Konwitschney), Erste Dame in Die Zauberflöte, Micaëla in Carmen, Mimì in La Bohème, Rosalinde in Die Fledermaus, Antonia in Les Contes d’Hoffmann, the title role in Jenufa (Willy Decker) and Tatyana in Eugene Onegin (Homoki).

In 2006, Sinéad debuted the role of Manon by Massenet with the Nationale Reisoper in the Netherlands and made her Vienna Staatsoper debut as Jenufa alongside Agnes Baltsa in a production conducted by Graeme Jenkins.

In 2007/2008, Sinéad made her debut as Iseut in Frank Martin’s Le Vin Herbé at the Ruhrtriennale in Germany in an acclaimed Willy Decker production, sang Mimì in La Bohème at the Vienna Staatsoper, made her debut as Helena in A Midsummer Night's Dream at Opéra de Lyon and the Epidauraus Fastival in Athens, the Countess in Le Nozze di Figaro at the Vienna Staatsoper and on tour with the Vienna Philharmonic in Romania, her recital debut at La Monnaie in Brussels and a return to the Komische Oper as Tatyana in Eugene Onegin.

2008/2009 included Sinéad’s debut as Violetta in a new Hans Neuenfels production of La Traviata at the Komische Oper, a return to l’Opéra de Lyon as Iseut in Le Vin Herbé in Willy Decker’s critically acclaimed production and her Irish debut as Maria in Mazeppa by Tchaikovsky for Opera Ireland.

Highlights of the 2009/2010 season, included Mimì in La Bohème with Oper Frankfurt, Jenny in Der Aufstieg und Fall der Stadt Mahagonny by Kurt Weill at the Komische Oper Berlin and a return to the Countess in Le Nozze di Figaro at the Opéra Royale of the Chateau de Versailles.

This season, Sinéad has sung Mimí in La Bohème in a live radio broadcast with the National Symphony Orchestra at the National Concert Hall in Ireland. Most recently, she has made her Teatro alla Scala debut in Milan as Marquise de Merteuil in the premiere of Quartett by Luca Francesconi.

Upcoming projects include her role debut as Leonore in Fidelio at the Staatstheater Wiesbaden and Governess in The Turn of the Screw at Central City Opera in Colorado.

Concert work has included Mozart’s Exultate Jubilate, Mahler’s Symphony no. 4 and Mozart’s Mass in c minor with the Niew Sinfonietta in the Netherlands and with Michel Corboz at the Toulon Festival in France. She has also performed Mahler’s Symphony no. 2 with Joseph Swensen in Scotland and Mahler’s Symphony no. 4 with Kirill Petrenko and the Komische Symphony Orchestra in Berlin. In 2005, Sinéad travelled to Tallinn, Estonia, where she sang Samuel Barber’s Knoxville Summer of 1915 with the Estonian National Symphony and Olari Elts. Sinéad has become somewhat of a specialist in singing Schostakovich’s 14th Symphony and has appeared with the Het Gelders Orkest in the Netherlands, the Northern Sinfonia in Manchester and the Orchestre d’Auvergne in France.

In 2010, Sinéad was the soprano soloist in Beethoven’s 9th Symphony with the Chambre Philharmonique and Emmanuel Krivine which toured France which was released on the Naive label. She was also the soprano soloist in Robert Schumann's Das Paradies und die Péri with the RTE National Symphony Orchestra at the National Concert Hall in Dublin, Ireland.