Dr Lim is an Associate Professor of occupational and public health at the Universiti Malaya (UM). He holds a Doctor of Public Health (DrPH), Master of Public Health (MPH), and Bachelor of Medicine and Bachelor of Surgery (MBBS) from UM, as well as a Master in Occupational Safety and Health (MOSH) from the University of Turin, Italy Prior to joining UM, he worked for the Department of Occupational Safety and Health (DOSH), the district health office, and the Institute of Medical Research (IMR). A primary interest of him relates to the influence of the circadian system on chronic disease and mental health in humans. He also studies shift work as a surrogate for exposure to light at night including related biomarkers for cancer, metabolic syndrome, and mental health. In 2019, he was awarded a distinction in thesis titled "Health Effects of Night-shift Work Among Manufacuting Workers" when he obtained his DrPH.

Since 2021, Dr. Lim has participated in 26 projects, collectively securing grants exceeding USD 685 thousand (RM 3 million). As Principal Investigator, he has led studies on night shift work, fatigue, and non-communicable diseases. Dr Lim's main successful project as a Principal Investigator was the development of facial anthropometric data for Malaysian in 2021. The project worth more than USD 85 thousand (RM 345,000.00), which comprised 4,000 participants from all over Malaysia. The study aimed to produce suitable respirators (n-95) that fit the Malaysian population. This project resulted in the publication of four ISI Q1 and Q2 papers. The papers were presented during the 34th International Commission on Occupational Health (ICOH) Congress 2024, where he was the second Malaysian recipient honoured with the International Commission on Occupational Health (ICOH)-International Labour Organisation (ILO) Master Fellowship Award 2024. He is also the recipient of the Researcher Mobility and Networking Programme by National Cheng Kung University (NCKU) Taiwan 2024 and the award of Naveen Jindal Young Global Research Fellowship (2025-26).

Additionally, Dr. Lim serves as an article reviewer for prominent academic journals, which include BMJ Open, Plos One, and BMC Public Health. Dr. Lim is actively engaged in the production of media pieces, with a particular emphasis on subjects pertaining to occupational safety and health, as well as non-communicable diseases. Since the year 2021, he has successfully disseminated a total of 65 media articles.

In addition to his research endeavours, Dr. Lim is committed to mentoring the next generation of healthcare professionals and researchers. Currently, there are over 12 PHDs (3 graduated) and 16 master candidates (12 graduated) under his supervision. His teaching contributions extend globally, including the development and delivery of online occupational health courses on the FutureLearn platform, as well as the publication of a 300-page textbook on occupational health and a book chapter in Springer on Climate Change. His dedication to improving safety and health, teaching and research excellence has earned him recognition as the Best Lecturer (non-clinical) for the Universiti Malaya Medical Programme in 2024 and Certificate for Excellent Service UM in 2024. Dr. Lim's expertise and contributions extend beyond academia, as he frequently collaborates with healthcare organisations and policymakers to translate research findings into practical applications that benefit public health. His work continues to make a significant impact on the field and the broader community.