Nancy Ong was introduced to music at a young age when she started learning the piano at the age of 6. She picked up harmonica and pianica during her primary school days. In 1995, Nancy joined the Ngee Ann Secondary School Chinese Orchestra and started learning the YangQin under the tutelage of Liang Wei Cheng. The following year, she found her interest in percussion and became a percussionist of the Ngee Ann Secondary School Chinese Orchestra till graduation. During her time there, Nancy was the chairperson and committee member of the orchestra from 1996-1998 and represented the school to participate in various concerts and events. One of these include the ‘Rhythmic Reverberations’ concert that involved professional musicians as well as percussionists from various secondary schools. She was also involved in the Millennium concert organised by the Singapore Chinese Orchestra.
Nancy studied percussion professional under the guidance of several well known masters and instructors like Li Min Xiong, Quek Ling Keong, Teo Teng Tat to name a few. Nancy has worked with OmniArts Singapore Chinese Orchestra, Boon Lay Community Centre Chinese Orchestra, The People's Association Youth Chinese Orchestra, Singapore Chinese Orchestra, The Toa Payoh West Chinese Orchestra, Singapore Polytechnic Chinese Orchestra, Bukit Panjang Hokkien Association Opera Troupe, Hsinghai Chinese Orchestra, Cheng San Echoes of the Valley Chinese Orchestra among other ensembles. She has also been engaged in several overseas performances in Beijing, Shanghai, Harbin, Taiwan, Hong Kong, Malaysia and Australia.
Nancy started coaching students in both percussion and YangQin at the age of 18 and has taught in the Chinese Orchestras of various schools. She was the youngest conductor of a Silver Award winning school (Changkat Primary School) at the Singapore Youth Festival Central Judging 2004. She has conducted music enrichment programs for schools and continues to explore music in fun and creative ways. Nancy has organised several concerts and international music events such as the International Chinese Music Festival in 2002 and 2004, and the International Choral Festival in 2003. She has also coached MediaCorp artistes such as Chen Liping, Vivian Lai, Cynthia Koh, Jeanette Aw, Patricia Mok etc. In 2014, Nancy led a few schools to participate in "Our People, Our Music 2014”, a mega orchestra event organized by the Singapore Chinese Orchestra. With their joint effort, the event broke 2 World Guinness Records.
In 2015, Nancy choreographed a percussion performance for the ComChest Charity Show, and was subsequently involved in the 8th ASEAN Paragames’s opening and closing ceremonies in 2016, where she involved all of her percussion students from various schools.