UPSC Combined Geo-Scientist Examination 2027 is now a live opportunity for postgraduate candidates in geology, geophysics, chemistry and related disciplines. The Union Public Service Commission released Examination Notice No. 01/2027-GEOL on 2 September 2026 for 127 tentative vacancies across the Geological Survey of India (GSI) and the Central Ground Water Board (CGWB). Applications are open online until 22 September 2026 at 6:00 PM, and the Preliminary Examination is scheduled for 10 January 2027.
This guide focuses on the practical questions candidates need answered before applying: which posts are included, how the 127 vacancies are divided, who can apply, how the age rule works, what the three-stage examination looks like, what documents are important, and how to submit the form correctly. For the controlling requirements, always read the latest UPSC notice and the Combined Geo-Scientist Examination Rules.
Table of Contents
UPSC Combined Geo-Scientist Examination 2027 at a Glance
| Particular | 2027 Details |
|---|---|
| Conducting body | Union Public Service Commission (UPSC) |
| Examination | Combined Geo-Scientist Examination 2027 |
| Notice number | 01/2027-GEOL |
| Notification date | 2 September 2026 |
| Tentative vacancies | 127 |
| Application mode | Online |
| Last date | 22 September 2026, 6:00 PM |
| Preliminary Examination | 10 January 2027 |
| Main Examination | 19–20 June 2027 |
| Recruiting organisations | GSI and CGWB |
The official UPSC examination page confirms the notification date, application deadline and Preliminary Examination date. The published recruitment information identifies 127 tentative vacancies across GSI and CGWB. Vacancy numbers are subject to the conditions stated in the notice, so candidates should not treat the number as permanently fixed.
What Is the UPSC Combined Geo-Scientist Examination 2027?
The Combined Geo-Scientist Examination is a UPSC recruitment examination for scientific and technical posts connected with earth sciences, geology, geophysics, chemistry and groundwater work. The 2027 cycle covers positions in two major organisations: the Geological Survey of India under the Ministry of Mines and the Central Ground Water Board under the Ministry of Jal Shakti.
Unlike a general graduate recruitment exam, this examination is designed around specialist postgraduate qualifications. That makes the relevant Master’s degree and subject combination one of the most important checks before an applicant spends time on the form or examination preparation.
UPSC Geo-Scientist 2027 Vacancy Details
The 127 tentative vacancies are divided between Category-I posts in the Geological Survey of India and Category-II posts in the Central Ground Water Board. The published vacancy breakdown is as follows.
Category-I: Geological Survey of India — 111 Posts
| Post | Group | Vacancies |
|---|---|---|
| Geologist | Group A | 29 |
| Geophysicist | Group A | 0 |
| Chemist | Group A | 7 |
| Assistant Geologist | Group B | 34 |
| Assistant Geophysicist | Group B | 35 |
| Assistant Chemist | Group B | 6 |
| Total | 111 |
Category-II: Central Ground Water Board — 16 Posts
| Post | Group | Vacancies |
|---|---|---|
| Scientist B (Hydrogeology) | Group A | 5 |
| Scientist B (Chemical) | Group A | 1 |
| Scientist B (Geophysics) | Group A | 1 |
| Assistant Hydrogeologist | Group B | 7 |
| Assistant Chemist | Group B | 1 |
| Assistant Geophysicist | Group B | 1 |
| Total | 16 |
Across both categories, the reported total is 127 tentative posts. The notice also includes reservations within the vacancy structure, including vacancies identified for Persons with Benchmark Disability. Candidates should use the official notice for the exact reservation and disability-category distribution relevant to their application.
UPSC Geo-Scientist 2027 Important Dates
| Event | Date |
|---|---|
| Notification | 2 September 2026 |
| Application starts | 2 September 2026 |
| Last date to apply | 22 September 2026, 6:00 PM |
| Preliminary Examination | 10 January 2027 |
| Main Examination | 19 and 20 June 2027 |
| Personality Test | To be announced by UPSC |
The immediate deadline is the most important date for applicants: the online application window closes on 22 September 2026 at 6:00 PM. UPSC’s official examination page confirms the application deadline and the 10 January 2027 Preliminary Examination date.
UPSC Geo-Scientist 2027 Age Limit
The normal age band for the 2027 examination is 21 to 32 years as on 1 January 2027, subject to the relaxation provisions applicable under the examination rules. In practical terms, candidates should not decide eligibility from their current age alone. The prescribed reference date and the candidate’s date of birth have to be checked together.
The site already has a dedicated UPSC Geo-Scientist Age Limit 2027 guide covering the DOB window, relaxation and eligibility details. You can also use the Exact Age Calculator by Date of Birth as a preliminary age check, then confirm the result against the official UPSC rule.
Why the DOB Cutoff Matters
A candidate who is 32 today is not automatically eligible or ineligible. The relevant question is whether the candidate’s date of birth falls within the permitted range on the prescribed cutoff date. This is why an application should be checked using the actual DOB rather than a rounded age.
Age Relaxation
Eligible reserved-category candidates and other specified categories may receive upper-age relaxation under the applicable rules. The amount and conditions depend on the candidate’s category or status. Do not assume that every relaxation can be combined with every other relaxation; the examination rules control the final entitlement.
Educational Qualification: Who Can Apply?
Educational eligibility is post-specific. Broadly, the recruitment is aimed at candidates holding relevant Master’s-level qualifications in subjects such as geological science, geology, applied geology, geophysics, physics, chemistry and hydrogeology. The exact accepted degree names differ between posts.
Geologist
The Geologist route includes Master’s-level qualifications in specified geological and earth-science disciplines. The official notification lists a detailed set of accepted subject combinations, so a generic “M.Sc. in science” is not enough to establish eligibility.
Geophysicist and Assistant Geophysicist
These posts require specified postgraduate study in physics, applied physics, geophysics or related accepted specialisations. Candidates should compare the exact wording of their degree with the qualification clause in the notification.
Chemist and Assistant Chemist
Chemistry-related posts accept specified Master’s qualifications in chemistry and listed applied or analytical chemistry disciplines. Again, the exact post-wise wording should be checked rather than relying on the broad label “M.Sc. Chemistry”.
Hydrogeology Posts
Hydrogeology positions have their own subject requirements. Candidates interested in the CGWB posts should read the hydrogeology-specific qualification clause carefully because the acceptable academic background can differ from the GSI Geologist route.
UPSC Geo-Scientist 2027 Selection Process
The selection architecture has three broad stages:
- Stage I: Preliminary Examination
- Stage II: Main Examination
- Stage III: Personality Test / Interview
The 2027 Preliminary Examination is the immediate gateway. The current notification invites applications for the Preliminary Examination, and candidates who qualify at that stage are then permitted to proceed to the Main Examination under the rules.
UPSC Geo-Scientist Preliminary Exam Pattern 2027
The Preliminary Examination is objective in nature and uses a common General Studies component together with a discipline-specific paper. The structure reported for the 2027 cycle is:
| Paper | Area | Marks |
|---|---|---|
| Paper I | General Studies | 100 |
| Paper II | Geology / Geophysics / Chemistry stream subject | 300 |
| Total | 400 |
For candidates, the practical lesson is simple: do not prepare only the technical subject. The General Studies component is also part of the Preliminary structure, while the technical paper carries the larger share of the marks.
What Happens in the Main Examination?
The Main Examination moves away from the objective format and tests deeper subject knowledge through conventional/descriptive papers. The reported structure for the current examination cycle provides three discipline papers, with the Main stage carrying 600 marks in total. The Main Examination is scheduled for 19 and 20 June 2027.
This difference matters for preparation. A candidate who performs well on objective questions but cannot produce structured technical answers may struggle at the Main stage. Preparation should therefore gradually move from concept revision and MCQs toward written technical answers, diagrams where appropriate, numerical work where relevant, and timed practice.
Personality Test / Interview
Candidates who clear the written stages proceed to the Personality Test. UPSC uses the final stage to assess suitability for the service and the professional responsibilities attached to the posts. The interview should not be treated as a separate general-knowledge contest; candidates should be ready to discuss their academic specialisation, technical fundamentals, current issues related to earth sciences or groundwater where relevant, and the work associated with the post.
UPSC Geo-Scientist Salary and Pay: What Candidates Should Verify
Salary is an important consideration, but candidates should be careful with online figures. The 2027 examination notice and the applicable service/recruitment rules should be treated as the controlling sources for post-wise pay. Secondary websites currently report different pay levels for Group A and Group B posts, so it is safer not to present a single “UPSC Geo-Scientist salary” number as if every post has identical compensation.
What is clear is that the recruitment covers both Group A scientific posts and Group B assistant-level posts. The final compensation depends on the post, applicable Central Government pay rules, allowances and deductions. Candidates comparing this examination with another government job should therefore compare the exact post and grade rather than only the examination name.
Application Fee
The reported examination fee for applicable candidates is ₹200, while women, SC, ST and PwBD candidates are among the categories receiving fee exemption under the notification. Because fee rules can contain specific conditions, applicants should confirm their exemption status inside the official application process before submission.
How to Apply for UPSC Geo-Scientist Examination 2027
UPSC requires online application through its current online application system. The Commission has previously explained that the newer portal uses a Universal Registration and Common Application structure, with examination-specific information completed for the individual examination.
- Open the official UPSC examination information and online application portal.
- Complete or verify your Universal Registration details as required.
- Complete the Common Application Form and personal information carefully.
- Select the Combined Geo-Scientist Examination 2027 examination module.
- Choose the applicable category/stream and service preferences according to the notice.
- Enter your educational qualification exactly as shown on your certificates.
- Upload the photograph, signature and other documents in the required format.
- Pay the applicable fee if you are not exempt.
- Review the complete form before final submission.
- Save the final application/confirmation details for future reference.
Documents to Keep Ready
- Date-of-birth proof accepted under UPSC rules.
- Master’s degree certificate or qualifying academic documents.
- Semester/marks documents where required to establish the qualification.
- Category certificate, if claiming reservation.
- PwBD certificate, where applicable.
- Government-service or other supporting documents for any special relaxation claim.
- Recent photograph and signature in the prescribed digital format.
The most common document mistake is assuming that an application declaration can replace documentary proof later. UPSC verifies eligibility at the prescribed stage, so claims about DOB, qualification, category and other conditions must ultimately be supportable by valid documents.
Before You Submit the UPSC Geo-Scientist Form
Use a final eligibility checklist before pressing submit. First, confirm the exact post or category for which your academic qualification is acceptable. Next, check your date of birth against 1 January 2027 rather than relying on an approximate age. Then review your category, disability status and any relaxation claim against the supporting certificate you actually possess. Finally, compare every important field in the online form with the original documents you will later use for verification.
It is also useful to keep a copy of the submitted application and payment confirmation. Recruitment applications can become difficult to reconstruct months later, especially when a candidate is preparing for the Main Examination. A simple folder containing the application PDF, fee receipt, educational certificates, category documents and a copy of the relevant notification can save considerable time.
Do not rush through the service preference or stream-related choices simply because the deadline is approaching. Read the notification first, understand the posts for which you are academically eligible, and then make the choices required by the application system. If a qualification or document is unclear, the official UPSC notice and applicable examination rules should take priority over coaching-site summaries or social-media posts.
Common Mistakes Candidates Should Avoid
1. Checking Only the Broad Degree Name
“M.Sc.” or “M.Tech.” by itself does not establish eligibility. The accepted specialisation and post-wise qualification wording matter.
2. Using Current Age Instead of the Cutoff Date
Eligibility is tied to the prescribed reference date. Always check the exact DOB against the rule.
3. Waiting Until the Last Few Hours
The deadline is 22 September 2026 at 6:00 PM. Technical issues, document problems or payment delays can turn a simple application into a last-minute problem.
4. Preparing Only for the Preliminary Exam
The examination has multiple stages. A preparation plan should account for the descriptive Main Examination well before the Preliminary result.
5. Treating Third-Party Salary Figures as Official
Online salary estimates can mix different posts, grades and allowance assumptions. Use the applicable recruitment rules and official service information for the authoritative figure.
How to Prepare for UPSC Geo-Scientist 2027
A practical preparation plan should be divided into four layers.
- Technical foundation: revise core postgraduate concepts in your chosen stream.
- Prelims practice: solve objective questions under time pressure and review errors systematically.
- General Studies: maintain a compact current-affairs and general-science revision plan instead of leaving Paper I until the end.
- Mains writing: practise structured answers, technical explanations, diagrams and calculations where appropriate.
Because the Preliminary Examination is on 10 January 2027, candidates have a defined runway, but the application deadline arrives much earlier. First secure eligibility and submit the form correctly; then organise preparation around the January Prelims and the June Main Examination.
UPSC Geo-Scientist 2027 vs Other Government Recruitment
The most important distinction is specialisation. Many government examinations accept a broad graduation degree, whereas the Combined Geo-Scientist Examination is built around specific postgraduate scientific disciplines. That makes it particularly relevant to candidates whose academic background already matches geology, geophysics, chemistry or hydrogeology.
For general government-job eligibility, the site also covers broader opportunities such as Government Jobs After 40 in India. Candidates comparing bank recruitment can refer to the Banking Jobs Age Limit 2026 guide, while those checking another specialist scientific recruitment can review the ISRO Scientist/Engineer SC Recruitment 2026 article.
Frequently Asked Questions
How many vacancies are there in UPSC Geo-Scientist 2027?
The 2027 recruitment reports 127 tentative vacancies across GSI and CGWB. The vacancy figure is subject to the conditions in the official notice.
What is the last date to apply?
The last date is 22 September 2026 at 6:00 PM.
When is the Preliminary Examination?
The Preliminary Examination is scheduled for 10 January 2027.
When is the Main Examination?
The Main Examination is scheduled for 19 and 20 June 2027.
What is the age limit?
The normal age range is 21–32 years as on 1 January 2027, subject to the relaxation provisions in the applicable rules.
What qualification is required?
A relevant Master’s-level qualification is required, but the exact accepted subject depends on the post. Candidates should read the post-specific qualification clause rather than relying on a general degree label.
Can one application cover both GSI and CGWB categories?
The published recruitment information indicates that eligible candidates may apply for one or both categories through the prescribed application process, subject to the conditions in the notification.
Where should I apply?
Applications are submitted online through the UPSC online application system. The official UPSC site directs examination applicants to its current online portal.
Quick Action Plan for Applicants
- Verify your post-wise Master’s qualification.
- Check your DOB against the 1 January 2027 age reference date.
- Keep category and qualification documents ready.
- Submit the online form before 22 September 2026 at 6:00 PM.
- Start technical and General Studies preparation immediately after submission.
- Keep the Main Examination in view while preparing for Prelims.
Final Verdict
UPSC Combined Geo-Scientist Examination 2027 is a strong specialist government-recruitment opportunity for candidates whose postgraduate subject matches the notified scientific disciplines. The immediate attraction is the scale of the recruitment: 127 tentative vacancies across GSI and CGWB, with applications open until 22 September 2026. The Preliminary Examination is scheduled for 10 January 2027, followed by the Main Examination in June.
The most important next step is not simply to start studying. First verify your exact post-wise qualification, DOB-based age eligibility, category claims and documents against the official notice. Then submit the online application before the deadline and build preparation around both the objective Preliminary stage and the descriptive Main Examination.
Official sources: UPSC Combined Geo-Scientist Preliminary Examination 2027 and UPSC Online Application Portal.
