Poh Liong Yong has 32 years of experience teaching  O-Level and A-Level Physics in schools. He had been master teacher in Physics and involved in setting Physics papers in national examinations. He had also been in panels for evaluating questions and formulating marking schemes for the questions as well as a team leader for marking examination papers. He has authored many Physics books at both O-Levels and A-Levels. These books include textbooks, revision books, workbooks and sample examination papers and are used locally and internationally.