[5] In 1987, he was awarded scholarship by the Government of India to enroll as a PhD student at the Indian institute of Technology (IIT), Kharagpur and continue his research work in fiber optics at the Centre for Research and Training in radar and communications situated on that university.
He also received funding from Italian National Research Council under Parma University to support his PhD on telecommunication project.
[6] After 1991, Majumder rejoined Bangladesh University of Engineering and Technology and continued to serve it by taking various responsibilities.
He particularly taught courses on telecommunications, namely optical communications, analog and digital electronics, advanced electronics, digital communications, satellite communications, electrical circuits and systems, instrumentation & control systems, power systems analysis, electrical machines, laser theory, telecommunication engineering, advanced telecommunication engineering, coding and information theory.
[13] As one of the early pioneer in optoelectronics of Bangladesh, Majumder did some consultancy works in institutes like- Asia IT&C Program, South Asian Association for Regional Cooperations (SAARC) & Dhaka Chamber of Commerce (DCC).