As one of the missions of the International Atomic Energy Agency (IAEA) to ensure the peaceful application of nuclear materials all around the world, it is on this important note that Centres with radioactive materials own up to the responsibility to educate and train individuals on the peaceful uses of these materials. Part of its mission is to provide the facility for the promotion of peaceful application of Nuclear Science and Technology to Nigerians, to enhance the development and appreciation of nuclear science, to provide high level training and improvement of skilled personnel in collaboration with the international communities/agencies, and to conduct research activities in Nuclear Science and Technology to enhance one's knowledge. In line with promoting nonproliferation of radioactive materials and devices from malicious and illicit acts, the Centre for Energy Research and Training (CERT) educates and trains students, Researchers, law enforcement agencies, armed forces, nuclear regulators and other stakeholders in Nuclear Science and Technology, ensuring the safety and security of active and disused radioactive materials. This paper reviews the establishment and mandate of CERT and its role in taking advantage of the first and only Research Reactor in Nigeria (NIRR-1) for impacting capacity building and using it as a tool for training courses, workshops, seminars and for distant learning (Internet Research Laboratory) in promoting the peaceful use of the Nuclear Science and Technology for constructive and progressive purposes in the country and beyond.