UPSC Recruitment 2021. Union Public Service Commission UPSC Recruitment Jobs Update. (Vacancy No.20121701526) One vacancy for the post of Junior Scientific Officer Pay Scale: Level-7 in the Pay Matrix as per 7th CPC. General Central Service, Group ‘B’, Gazetted, Non-Ministerial. Age: 33* years. ESSENTIAL QUALIFICATIONS: EDUCATIONAL:. M.Sc. in microbiology from a recognized university or institute.