Dr. Sahai is a well-known and reputed economist in the field of Business Economics and Business Environment and has been teaching these modules at several institutes and universities for the last 47 years. He has also taught at various corporate organisations like Sunlife Financial, WNS, Nucleus Software Technologies, RBS, Infosys, Hindalco, THDC, NTPC, IBM, and Dell Technologies, etc.
He has also been the dean of academics, examination controller, and controller of the evaluation centre of the C.C.S. University numerous times. Additionally, he has been the director of the study centre at IGNOU. He has been coordinator- steering committee of the NAAC. He has been awarded the best teacher award by Lions club and Rotary organizations many times.