Dr Lim is a medical lecturer of occupational and public health at the University Malaya (UM). 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 for his thesis titled "Health Impacts of Night Work Among Employees in Malaysia" when he obtained his Doctorate degree (Doctor in Public Health).

Dr Lim main successful project as a Principal Investigator was the development of facial anthropometric data for Malaysian in 2021. The project worth more than USD85 thousand (RM345,000.00), 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.

Additionally, he holds the position of Editor for the Journal of Health and Translational Medicine (JUMMEC). Dr. Lim serves as an article reviewer for a notable selection of 12 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 60 media articles.