Yee-Fui is an Associate Professor and the Director (Higher Degree by Research) at Monash University. 

Yee-Fui's research centres on strengthening political institutions and enhancing executive accountability. Her work has focussed on the regulation and accountability of actors and institutions in the shadows of government, such as ministerial advisers, lobby groups and government corporations, utilising empirical, doctrinal and comparative methodologies.

Yee-Fui is the author of Combatting the Code: Regulating Automated Government Decision-Making in Comparative Context (Cambridge University Press, 2025), The Rise of Political Advisors in the Westminster System (Routledge, 2018) and Ministerial Advisers in Australia: The Modern Legal Context (Federation Press, 2016), which was a finalist of the Holt Prize. Dr Ng also co-authored Douglas and Jones's Administrative Law (Federation Press, 9th ed, 2024). She has publications in leading Australian and international books and journals, including the Law Quarterly Review, Public Law, Federal Law Review, Melbourne University Law Review, UNSW Law Journal, The Oxford Handbook of the Australian Constitution, and The Oxford Handbook of Political Executives.

Yee-Fui was a 2021-22 Fulbright Scholar and undertook research at New York University on the digital welfare state. She has also been a visiting scholar at Oxford University, the University of London, and University College London.

In 2023, Yee-Fui was the winner of the Monash University Vice-Chancellor’s Award for Research Excellence by an Early Career Researcher (HASS) (the University’s highest honour for outstanding research excellence and impact). She was also awarded the Monash University Faculty of Law Dean’s Award for Excellence in Research Engagement and Impact (2024), Faculty of Law Dean's Award for Excellence in Research by an Early Career Researcher (2023, 2021 and 2019), RMIT Graduate School of Business and Law Outstanding Early Career Researcher Award (2016), and RMIT Graduate School of Business and Law Research Impact Award (2016). For her PhD, she was awarded the Monash Silver Jubilee Postgraduate Research Scholarship, as the highest ranking PhD applicant in the University, as well as the Monash Postgraduate Law Dean's Award, as the top-ranking PhD applicant in the Monash Law Faculty.

Yee-Fui's work has been recognised by the High Court, federal government and Parliament. She was invited to deliver the Senate lecture at Parliament House in 2017, where she presented on the accountability of ministerial advisers. She was also invited to give evidence to federal parliamentary inquiries into political donations and freedom of information. She has provided training to senior military officers on dealing with ministerial advisers at the Centre for Defence and Strategic Studies.

Yee-Fui has co-written key reports for the New South Wales Independent Commission Against Corruption and the New South Wales Electoral Commission on the regulation of political lobbying, and the Commonwealth Attorney-General's Department on the federal government's use of automation and new technologies and its implications for the integrity law frameworks. She also worked in an interdisciplinary team on the Building 4.0 Cooperative Research Centre (CRC) on a scoping study for electronic approvals of planning and building permits. She has received research funding totalling $560,500 from federal and State governments, universities and international organisations.

Dr Ng is a prolific commentator on contemporary political issues in both electronic and broadcast media, including in The Conversation, ABC radio, as well as ABC and SBS television. In 2017, Yee-Fui was the winner of the RMIT University Media Star of the Year Award for the College of Business.

Dr Ng is a Victorian Convenor of the Electoral Regulation Research Network. She has previously worked as a Policy Adviser at the Department of the Prime Minister and Cabinet, a Senior Legal Adviser at the Victorian Department of Premier and Cabinet, as well as a Manager at the Victorian Department of Justice. Yee-Fui has also practised as a solicitor at top tier law firms in Melbourne, London and Canberra, and has researched and taught at the Australian National University and RMIT University.