The Union Public Service Commission (UPSC) has officially published the recruitment notification for the Combined Geo-Scientist Examination 2026. This examination serves as a centralized selection gateway for appointing scientific officers to Group ‘A’ and Group ‘B’ Gazetted services in the Geological Survey of India (GSI) under the Ministry of Mines, as well as the Central Ground Water Board (CGWB) under the Ministry of Jal Shakti.
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Key Topics Covered
Positions announced under this notification include Geologist, Geophysicist, Chemist (within GSI), and Scientist ‘B’ across Hydrogeology, Chemical, and Geophysics streams (within CGWB). Eligible postgraduates holding an M.Sc, M.Tech, or equivalent qualification in Earth Sciences, Physics, Chemistry, or allied subjects can submit their applications online through the UPSC One-Time Registration (OTR) portal at upsconline.nic.in.

UPSC Combined Geo-Scientist Examination 2026: Fast Overview
| Parameter | Official Notification Details |
| Exam Conducting Body | Union Public Service Commission (UPSC) |
| Exam Name | Combined Geo-Scientist Examination 2026 |
| Parent Organizations | Geological Survey of India (GSI) & Central Ground Water Board (CGWB) |
| Positions Offered | Geologist, Geophysicist, Chemist & Scientist ‘B’ (Hydrogeology/Chemical/Geophysics) |
| Service Classification | Central Civil Services, Group ‘A’ & Group ‘B’ Gazetted Scientific Cadre |
| Application Mode | Online via UPSC One-Time Registration (OTR) Portal |
| Online Application Deadline | 22 September 2026 (until 06:00 PM) |
| Application Correction Window | 23 September 2026 to 29 September 2026 |
| Selection Framework | Stage-I (Prelims CBT) + Stage-II (Mains Written) + Stage-III (Interview) |
| Official Portals | upsconline.nic.in & upsc.gov.in |
Important Dates Schedule
Candidates should note the key dates for registration, form correction, and examinations:
| Examination Milestone | Scheduled Calendar Date | Status |
| Official Notification Issued | 02 September 2026 | Released |
| Online Application Opening Date | 02 September 2026 | Active |
| Last Date to Submit Online Application | 22 September 2026 (until 06:00 PM) | Closing Soon |
| Application Form Correction Window | 23 September 2026 to 29 September 2026 | Upcoming |
| Admit Card Release Date | 1 to 2 weeks prior to Stage-I Exam | Portal Download |
| Stage-I: Preliminary Examination Date | January / February 2027 | Scheduled |
| Stage-II: Main Written Examination Date | To be notified post Stage-I results | Scheduled |
Application Fee & Payment Mode
| Category | Examination Fee |
| General (UR), OBC, and EWS Male Candidates | ₹200/- |
| All Female Candidates (Any Category) | ₹0/- (Exempted) |
| SC / ST / PwBD Candidates | ₹0/- (Exempted) |
Payment Channels: Candidates can pay online using Visa, Mastercard, RuPay credit or debit cards, Net Banking, or UPI. Cash payments can also be made by generating a system-generated Pay-in-Slip and depositing cash at any State Bank of India (SBI) branch before the prescribed deadline.
Post-Wise Educational Qualifications
Candidates must hold a recognized Master’s degree (M.Sc or M.Tech) from an accredited university in the relevant specialization:
1. Geologist (Group ‘A’ – GSI)
- Master’s degree in Geological Science, Geology, Applied Geology, Geo-Exploration, Mineral Exploration, Engineering Geology, Marine Geology, Earth Science and Resource Management, Oceanography and Coastal Areas Studies, Petroleum Geosciences, or Petroleum Exploration.
2. Geophysicist (Group ‘A’ – GSI) & Scientist ‘B’ (Geophysics – CGWB)
- M.Sc in Physics, Applied Physics, Geophysics, Applied Geophysics, Marine Geophysics, Exploration Geophysics, or Petroleum Geophysics.
3. Chemist (Group ‘A’ – GSI) & Scientist ‘B’ (Chemical – CGWB)
- M.Sc in Chemistry, Applied Chemistry, Analytical Chemistry, Physical Chemistry, Inorganic Chemistry, Organic Chemistry, or Industrial Chemistry.
4. Scientist ‘B’ / Assistant Hydrogeologist (Hydrogeology – CGWB)
- Master’s degree in Geology, Applied Geology, Marine Geology, or Hydrogeology.
(Note: Candidates enrolled in the final year or final semester of their qualifying Master’s degree program are provisionally eligible to sit for the Stage-I Preliminary Examination, provided they present documentary proof of passing the degree during the Stage-II Detailed Application Form verification).
Age Limitations & Statutory Relaxations
- Geological Survey of India (GSI) Posts: 21 to 32 Years.
- Central Ground Water Board (CGWB) Scientist ‘B’ Posts: 21 to 35 Years.
- Permissible Upper Age Relaxations:
- Other Backward Classes (OBC – Non-Creamy Layer): 3 Years
- Scheduled Caste (SC) / Scheduled Tribe (ST): 5 Years
- Persons with Benchmark Disabilities (PwBD): Up to 10 Years
Three-Tier Examination Pattern & Selection Architecture
$$\text{Final Merit List (800 Marks)} = \text{Stage-II Main Written Exam (600 Marks)} + \text{Stage-III Interview (200 Marks)}$$
[Stage-I: Preliminary Exam (400 Marks - Objective CBT)] ───► (Qualifying Screening)
│
▼
[Stage-II: Main Written Exam (600 Marks - Descriptive)] ───► (Counts for Merit)
│
▼
[Stage-III: Interview / Personality Test (200 Marks)] ────► (Counts for Merit)
Stage-I: Preliminary Examination (Computer Based Screening – 400 Marks)
- Paper-I (General Studies): Common for all streams — 100 Marks (2 Hours duration).
- Paper-II (Stream-Specific Discipline): Geology / Geophysics / Chemistry / Hydrogeology — 300 Marks (2 Hours duration).
- Marking Scheme: Objective Multiple Choice Questions (MCQs) with a negative marking penalty of one-third (0.33) marks deducted for each incorrect response.
Stage-II: Main Written Examination (Descriptive – 600 Marks)
Candidates qualified in Stage-I appear for the written descriptive test consisting of three discipline-specific papers:
- Paper-I: Stream Subject — 200 Marks (3 Hours)
- Paper-II: Stream Subject — 200 Marks (3 Hours)
- Paper-III: Stream Subject — 200 Marks (3 Hours)
Stage-III: Personality Test / Interview (200 Marks)
Candidates clearing the Stage-II written cutoff are called before an expert UPSC board in New Delhi to assess scientific aptitude, field observation capability, and domain clarity.
Step-by-Step Online Application Guide (UPSC OTR System)
- Open the official recruitment portal: upsconline.nic.in.
- Click on One-Time Registration (OTR) for Examinations of UPSC.
- If not registered, click New Registration to enter your demographic particulars (Full Name, Father’s Name, Mother’s Name, Date of Birth, Board Roll Number) and authenticate via mobile/email OTP.
- Log into your account using your OTR ID, Mobile Number, or Email along with your password.
- On the dashboard, locate Combined Geo-Scientist Examination 2026 under the “Latest Notifications” directory.
- Click Click Here for Part-I to choose your qualifying discipline, target post options (GSI, CGWB, or both), and exam center preferences.
- Pay the ₹200 application fee through Net Banking, Cards, UPI, or select the SBI cash challan mode (exempt categories skip this step).
- Upload a clear digital photo, specimen signature, and an identity proof PDF (such as your PAN Card or Voter ID) meeting UPSC dimensions.
- Review your entries on the preview page, accept the declaration, submit the form, and download a printed copy for future reference.
💡 RK Advice: 5 Essential Tips for UPSC Geo-Scientist Aspirants
- Verify Stream Compatibility for Dual Application (GSI & CGWB): Geology and Applied Geology postgraduates can apply simultaneously for Geologist in GSI and Scientist ‘B’ (Hydrogeology) in CGWB through a single application form. Check both options in your preferences if eligible.
- Balance General Studies Preparation in Stage-I: Many science postgraduates focus solely on their core technical discipline, overlooking the 100-mark General Studies paper in Stage-I. Scoring well in current events, general science, and Indian polity provides a vital cushion to clear the preliminary screening cutoff.
- Keep Identity Document Numbers Identical in OTR: The photo identity number entered in your OTR profile must match the physical ID card carried to the examination center. Discrepancies can lead to verification delays at the entry gates.
- Practice Descriptive Numerical Answers for Stage-II: Unlike the preliminary stage, the Main examination requires full descriptive derivations, structural sketches, and numerical solutions in geophysics and physical chemistry. Regular practice with previous UPSC question papers is key to completing answers within the 3-hour limit.
- Submit Well Before the 22 September Cut-Off: The UPSC server traffic increases significantly on the final day, and the application window closes strictly at 06:00 PM (not midnight). Completing your registration early helps prevent submission failures.
Important Links: UPSC Combined Geo-Scientist 2026
| Resource / Official Portal | Direct Action Link |
| Join Official WhatsApp Channel (Fast Alerts) | 📲 Join WhatsApp Channel |
| Direct Candidate Portal Login (OTR Apply Link) | 👉 Login & Apply Online |
| UPSC OTR Main Application Portal | upsconline.nic.in |
| Download Official Notification PDF | 📄 View Official Notification |
| Best Earth Sciences & Geo-Scientist Preparation Books | 🛒 Buy on Amazon |
| UPSC Official Website | upsc.gov.in |
Frequently Asked Questions (FAQs)
Q1: What is the closing date for UPSC Geo-Scientist 2026 online registration?
Ans: The online application deadline is 22 September 2026 at 06:00 PM.
Q2: Are final-year M.Sc students eligible to apply?
Ans: Yes. Candidates appearing in the final year or semester of their qualifying Master’s degree program can apply provisionally for the Stage-I examination. They must submit proof of completion before attending the Stage-II examination.
Q3: Are Preliminary Examination marks counted in the final merit list?
Ans: No. Stage-I marks are used exclusively to screen candidates for the Stage-II Main examination. The final merit ranking is calculated out of 800 marks (600 marks from Stage-II plus 200 marks from the Stage-III Interview).
Q4: Is there an application fee for female candidates?
Ans: No. All female applicants, as well as SC, ST, and PwBD candidates, are completely exempt from the application fee.