Hazlee Azil Illias was born in Kuala Lumpur, Malaysia. He received Bachelor's Degree in Electrical Engineering from the Universiti Malaya, Malaysia in 2006. He immediately joined Freescale Semiconductors (M) Sdn. Bhd. as a product engineer before pursuing his PhD studies in 2008. He obtained PhD Degree in Electrical Engineering from the University of Southampton, United Kingdom in 2011. He was a Senior Lecturer from 2011 to 2016 and an Associate Professor from 2016 to 2024 at the Department of Electrical Engineering, Universiti Malaya. Currently, he is a Professor at the Department of Electrical Engineering, Universiti Malaya. Since joining the Universiti Malaya, he has received funding and grants of nearly RM 3 million (~USD 0.7 million), published more than 70 journal papers in ISI-indexed publications and 70 refereed conference papers and successfully supervised to completion of 13 PhD, 6 Master's Degree by research and 27 Master's Degree project (by coursework) candidates. He is currently an Associate Editor of IET Science Measurement and Technology (since 2019), the Head of Universiti Malaya High Voltage Laboratory and Research Group (since 2011) and the Counselor of IEEE Universiti Malaya Student Branch (since 2018). His current management post at the Universiti Malaya is the Director of Corporate Ranking Centre (CRC) under Associate Vice Chancellor (Corporate Strategy). He was the Head of Department of Electrical Engineering from September 2013 to July 2014 and the Secretary of IEEE Dielectrics and Electrical Insulation Society (DEIS) Malaysia Chapter from 2015 to 2019. He is now a Senior Member of IEEE (Institute of Electrical and Electronics Engineers), Fellow of IET (Institution of Engineering and Technology), Corporate Member of IEM (Institution of Engineers Malaysia), a registered Chartered Engineer (C.Eng UK) and a Professional Engineer (P.Eng Mal). He is an active reviewer for numerous high-quality journals, which include publishers from IEEE, IET, Elsevier and IOP. His main research interests include modelling and measurement of partial discharge phenomena in solid dielectric insulation, condition monitoring, insulation system diagnosis, lightning overvoltage, transmission line modelling, optimisation methods and artificial intelligence techniques.