The paper focused on repositioning Technical and Vocational Education and Training (TVET) for youth's employment and national security in Nigeria. It examined briefly the concepts of technical vocational education and training (TVET), youths, unemployment and national security as well as the effects of unemployment on national security in Nigeria. It also examined the role of technical vocational education and training (TVET) in facilitating youths' employment in order to foster national security in Nigeria as well as the challenges facing the effective implementation of TVET programmes in Nigeria. The authors contended that TVET has been accepted globally as a strong catalyst to development and sustainable national security because of its potentials in job creation, wealth generation, poverty reduction and technological transformation. It was suggested, among others, that the relevant arms of government should adequately fund, plan, implement, and manage TVET programmes in all educational institutions, especially tertiary institutions in Nigeria. In addition, provision of adequate facilities, equipment, consumable materials, and hand tools is very imperative for TVET to be adequately repositioned in Nigeria.