She returned to Singapore in 1982 to join NUS. With a government grant, she helped to establish the Bioprocessing Technology Unit in 1990, which was later renamed as Bioprocessing Technology Centre in 1995 as a National research centre for bioprocessing technology with Yap as the Director. In 2003, the centre was renamed the Bioprocessing Technology Institute and relocated to the new Biopolis research centre in Singapore. She also founded two organisations, the Centre for Natural Product Research and the Biopharmaceutical Manufacturing Technology Center. During her career, she published 58 papers in peer-reviewed journals. In February 2006, Yap was named a Foreign Associate to the United States National Academy of Engineering. Her election citation noted "her outstanding achievements in education, research and management in the field of mammalian cell culture". She is the only female scientist and second Singaporean to be elected to the academy. She was awarded the President's Science and Technology Medal in 2009, becoming the first female winner of Singapore's most prestigious science prize. Yap was named Executive Director of A*STAR Graduate Academy in November 2006, focusing on talent management and development in partnership with Imperial College London. She has been a lecturer in the Advanced Course in Cell Technology at the University of Minnesota, which describes her as:
Prof Miranda Yap is the founding Director of BTI, which is the pivotal institution in advancing Singapore’s bioprocessing research and plays a critical role in Singapore’s success in the expansion of biomanufacturing industry. She has been instrumental in nurturing BTI’s growth; transforming it from its nascent days as the Bioprocessing Technology Unit in National University of Singapore to a renowned international institution today. She has trained numerous PhD and master students in many areas of biotechnology. In cell culture technology her work has spanned from early work on cellular physiology to recent transcriptome and proteome analysis for cell engineering.
Personal
Yap was married to Dr Yap Kian Tiong and died in Singapore on October 14, 2015 five years after suffering from an aneurysm.