NIOS is completely a Government approved institute and offers private education to the students. Any student who has completed his/ her education from this institute or Board is eligible for any further studies in graduation and post graduation and professional courses and also can apply to various job vacancies in both the PSUs and Private job sectors as well. But then the preference in PSUs is usually given to the candidates with a regular education background from ICSE, CBSE or State boards and one should be ready for the same. All I can suggest you is to put in your hard work and try to achieve higher results.