Mr Szeto embarked on his teaching career when he joined the Department of Computing and Mathematics of the Hong Kong Technical College (Tsing Yi), Vocational Training Council, as a full-time lecturer. Before joining HKCC, he served at the Department of Management and Marketing of The Hong Kong Polytechnic University. Other then full-time teaching, Mr Szeto also worked as a part-time dissertation supervisor for top-up degree programmes at PolyU SPEED.
Mr Szeto teaches subjects covering management, marketing, logistics and information technology. At HKCC, other than being a college lecturer, he is also a member of the Management Committee, and the Chairman of the Information Technology and Teaching Facilities Group. Outside of HKCC, Mr Szeto is a full member of the Hong Kong Management Association and the Hong Kong Professional Teachers' Union.