One of Asia’s most outstanding opera singers, Nancy made her debut upon graduation from the Royal Academy of Music, London, with the Welsh National Opera, singing the title role of Madama Butterfly to great critical acclaim. She has since reprised the role all over the world, notably with the English National Opera, Scottish Opera, West Australian Opera, Opera Queensland, Opera Northern Ireland, Singapore Lyric Opera (SLO), Bangkok Opera (BO), the New Zealand International Festival of Arts, the Barbados Opera Festival, and at the Royal Albert Hall in 1998, 2000 and 2003.
Other starring operatic roles include Romilda (Xerxes), Violetta (La Traviata), Aida, Gilda (Rigoletto), Tytania (A Midsummer Night’s Dream), Rosalinda (Die Fledermaus), Nedda (Pagliacci), Leonora (Il trovatore), Tosca, Liza (The Queen of Spades), Mimi (La Bohème), Jenny (Mahagony Songspiel), Micaëla (Carmen), Pamina (Die Zauberflöte), Donna Anna (Don Giovanni), Liu (Turandot), Antonia (Les contes d’Hoffmann), Thaïs and Countessa (Le nozze di Figaro).
A celebrated recitalist and versatile concert artist, her appearances included performances with Christopher Hogwood, Trevor Pinnock, Richard Armstrong, Carlo Rizzi and orchestras such as the London Mozart Players, the BBC Concert Orchestra, the Singapore Symphony Orchestra, the Tivoli Symphony Orchestra and the Shanghai Opera Orchestra.
Nancy has given masterclasses in Taiwan, Malaysia, Singapore and China. She was one of the adjudicators for the 2007 Hong Kong Schools Music Festival and also for the Competizione dell’Opera organized by the Opera Bremen, Germany, in 2009.
As an opera director, she has staged Salieri’s Prima la musica e poi le parole and Mozart’s Così fan tutte.
In 2011 she sings the title role of Mae Naak with Opera Siam in London and the world premiere of the role of Soong Ching Ling in Opera Hong Kong's production of Dr. Sun Yat-sen. Nancy was the Head of Vocal Studies at the Nanyang Academy of Fine Arts, Singapore, from July 2003 till February 2010. She joined The Hong Kong Academy for Performing Arts as Head of Vocal Studies in March 2010.