Onn Haji Hashim received his BSc Hons degree from University of Malaya in 1984, and PhD from University of Glasgow in 1987. He joined the academic staff of University of Malaya in 1988, and retired from active service as Professor grade VK5 in March 2019. He was then appointed as Honorary Professor at the Department of Molecular Medicine, Faculty of Medicine, University of Malaya. During his tenure, Onn has undertaken leave to conduct research at University of Osaka Medical School in 1991 and University of Alabama at Birmingham in 1994, under sponsorships of JSPS Fellowship and Fulbright Scholar Award, respectively. He was recipient of the National Academic Award 2007 in the category of journal article publication. Onn has acted as external examiner of medical/dental biochemistry programmes at 11 different universities, and external examiner of PhD/MSc theses from six different universities, including those from Singapore and India. He sits on the Editorial Board of Biomarker Research since 2012 and was appointed as Visiting Professor at Prince of Songkla University Thailand in 2016 and 2017. Onn has authored more than 100 articles in peer-reviewed journals and presented more than 60 guest lectures locally and internationally. He has supervised 16 PhD and 14 Master's students to successful completion and sat on numerous expert advisory and evaluation committees at national and international levels. He was elected to the Fellowship of Academy of Sciences in 2018. Onn's current research interest is in proteomics, particularly in the use of lectin-based techniques in search of novel glycopeptide biomarkers in bodily fluid samples from patients with different cancers as well as the application of human hair shaft keratins as biomarker signature to distinguish gender, ethnicity and age.