UPSC Apply Online recruitment for CGS (Prelims) Exam 2021. Union Public Service Commission (UPSC) has given a notification for the recruitment of Combined Geo-Scientist Examination 2020. Those Candidates who are interested in the vacancy details & completed all eligibility criteria can read the Notification & Apply Online. Name  of Vacancies: CGS (Prelims) Exam 2021 – 40 Posts Name