Khong obtained his Bachelor’s Degree and PhD in Sports Sciences from the University of Malaya. He has been working in exercise physiology labs since 2013,and from 2018 - 2019 he was a senior lecturer in the Department of Sports Sciences, Faculty of Applied Sciences, Tunku Abdul Rahman (TAR) University College, mainly lecturing on exercise physiology subjects as well as some sports psychology and motor control and learning courses. He began his new career, also as a senior lecturer, at his alma mater, University of Malaya, since 2020.

He specialises in exercise physiology and exercise testing, particularly laboratory-based cardiovascular fitness (VO2max) test and isokinetic & isometric strength tests. His research field mainly involves usage of nutrition intervention to prevent exercise fatigue in both endurance exercise and muscular force demanding situations. He has also started to delve into works investigating effects of exercise on health conditions such as diabetes and sarcopenia.

On the administration end, he is currently the program coordinator for the Master's Degree in Strength and Conditioning.