Sifeng Liu earned a B.S. in mathematics in 1981 from Henan University, an M.S. in economics in 1986, and a Ph.D. in systems engineering in 1998 from Huazhong University of Science and Technology, both in China. He served as a visiting professor at Slippery Rock University in Pennsylvania, De Montfort University in England, and Sydney University in Australia.

At present, he is the director of the Institute for Grey Systems Studies and the dean of the College of Economics and Management at Nanjing University of Aeronautics and Astronautics (NUAA) and a distinguished professor, academic leader, and doctor tutor in management science and systems engineering. His research focuses on grey systems theory, systems evaluation, and prediction modeling. He has published over 200 research papers and 19 books. Over the years, Dr. Liu received 18 provincial and national prizes for his outstanding achievements in scientific research and he was named a distinguished professor and an expert who made significant contributions to China. In 2002, he was recognized by the World Organization of Systems and Cybernetics. He is a member of the Evaluation Committee and the Teaching Direct Committee for Management Science and Engineering of the National Science Foundation of China (NSFC). Additionally, he currently serves as chair of the TC of IEEE SMC on Grey Systems, president of the Grey Systems Society of China (GSSC), vice president of the Chinese Society for Optimization, Overall Planning and Economic Mathematics (CSOOPEM), cochair of the Beijing and Nanjing chapters of IEEE SMC, vice president of the Econometrics and Management Science Society of Jiangsu Province (EMSSJS), and vice president of the Systems Engineering Society of Jiangsu Province (SESJS).

He is the editor of Grey Systems: Theory and Application (Emerald, UK) and serves on the editorial boards of several professional journals including the Journal of Grey Systems, Scienti.