In 2002 Kornélia was engaged by the Hungarian State Opera House and became a member of its opera studio. At the same time she began to perform with the Hungarian State Opera.

Kornélia regularly performs with the MAV Symphonic Orchestra and the Hungarian Virtuosi Chamber Orchestra at the Matthias Church in Budapest where she sings Mozart: Requiem, Exsultate Jubilate, Krönungs-messe, Missa Brevis, Laudate Dominum, c-minor messe, Pergolesi:Stabat Mater, Händel:Messiah, Haydn:Creation, J.S.Bach: Christmas Oratorio and Vivaldi: Juditha Triumphans.

Her repertoire ranges from Bach through to Mozart, Schubert, Brahms, Mendelssohn, Liszt, Goldmark, Debussy, Faure, Duparc as well as composers of the 20th Century such as Bartok, Kodaly and Britten. She toured as a soloist in Japan - New Year’s Eve Concerts (1997, 2000 & 2003) and in the 2004 opera tour with the Hungarian State Opera.

In Germany – New Year’s Eve Concerts including a number of operetta arias (2004). In Mexico - Solo recitals (2002, 2003 & 2006). In Spain – Concerts in Andalucia (2005) and in Thailand – Hungarian State Opera Tour (2005).

In 1996 Kornélia was honoured to sing a selection of Bartok’s songs for Her Majesty Queen Beatrix of The Netherlands on the occasion of the Royal visit to Hungary.

In 2002 she sang for Mrs Laura Bush, First Lady of the United States of America at the American Embassy in Budapest. Kornélia is often invited to sing in the Hungarian Cultural Centre in London and on two occasions in the Cultural Centre in Paris.

She has also performed at the Hungarian Embassy in London as well as the embassies of Norway, Great Britain, United States of America, Mexico and The Netherlands in Budapest. In 2006 she was involved in a solo recital for the International Jewish Music Festival in London and solo concerts in Mexico.

To date Kornélia’s professional repertoire includes:

2010 April Corporate concert in Angkor Wat Temple (Cambodia)
2009 January Concert tour in Japan with the Hungarian Virtuosi Chamber Orchestra
2006 December Christmas Concerts in the Matthias Church - Budapest
November Concert Tour – Mexico
June Mozart: Die Zauberflöte (Papagena) – Budapest
April Mozart: c-minor Messe
Kacsóh: John, the hero (Iluska) – Budapest
Mascagni: Cavalleria Rusticana (Lola) – Hungary
2005 December Christmas Concerts in the Matthias Church – Budapest
Christmas Concerts at the Hungarian Cultural Centre – London
October Concert tour in Andalucia – Spain
September Verdi: Rigoletto (Countess Ceprano)
Puccini: Madama Butterfly (Kate Pinkerton) – Thailand
April Donizetti: L’ Eliire d’amore (Gianetta) – Budapest
February Kodály: Székelyfonó Spinnstube (Mädchen) - Budapest
2004 November Puccini: Gianni Schicchi (Lauretta) – Budapest
October Verdi: La Traviata (Flora) and Rigoletto (Countess Ceprano), tour with the Hungarian State Opera – Japan
July Weber: Abu Hassan (Fatima) – Budapest
June Tchaikovsky: The Queen of Spades (Chloe) – Miskolc Opera Festival
April Pergolesi: Stabat Mater – Budapest, Matthias Church
Mozart: Requiem - Budapest, Matthias Church
January New Year’s Concerts with Szeged Symphonic Orchestra - Germany
2003 December J. S. Bach: Christmas Oratorio – Budapest
October Mozart: Le Nozze di Figaro (Barbarina) – Budapest
Verdi: Don Carlos (Tebaldo) –Budapest
September Pergolesi: Stabat Mater – Budapest
July Händel: Julius Caesar (Cleopatra) – Budapest
June Mozart: Don Giovanni (Donna Anna) – Miskolc
Haydn: Le Pescatrici (Nerina) – Budapest
May Tchaikovsky: The Queen of Spades (Chloe) cond:Jurij Szimonov
January New Year’s Concerts, Hungarian Virtuosi Chamber Orchestra –Japan
2002 April Händel: Messiah, Matthias Church - Budapest
March Concert Tour - Mexico
January New Year Concert, State Opera House – Budapest
2001 August Donath Ede: Szulamit (Szulamit) - Budapest
July Solo concert in ‘Verdi Conservatorio di Milano’ - Milano
April Recital in Tel-Aviv – Israel
February Mozart: Don Giovanni (Donna Anna) – Budapest
2000 December Solo recital in the Hungarian Institute - Paris
August Mozart: Requiem, Exsultate Jubilate - Budapest
July CD recording of Liszt Ferenc songs
June Tenth International Jewish Music Festival - London
February Puccini: La Boheme (Mimi) – Miskolc
January New Year’s Concerts, Hungarian Virtuosi Chamber Orchestra – Japan
1999 May Concert for the Queen of Netherland in Budapest
March Concert ’France Musique’ Radio – Paris
1998 March Solo recital in ‘Salle Cortot’ – Paris
1997 June BBC Cardiff Singer of the World – Cardiff
March Bernstein: West Side Story (Maria) – Budapest