One of the main initiatives in developing human capital is improvement in the domain of professional employment. It is essential for the growth of people or identity, society, and nation. The main aim of this research paper is to confirm the level of work efficiency in producing a workforce in the field of professional teaching staff in Technical and Vocational Education and Training (TVET) for Training Centers in the oil &gas industry. The level of professionalism of the teaching staff studied involves matters related to the readiness of this group in the teaching process which includes knowledge, skills, and competence in the subjects taught. It also includes an individual's identity or attitude. The professionalism of the teaching staff will also be measured by preparation for the teaching process, related to the planning in teaching, practicing the planning, and using the method in the teaching method as well as the evaluation process for the teaching. For TVET Training Centers in the oil &gas industry to build professional teaching staff, all these factors must be investigated and evaluated.