Council of Scientific & Industrial Research SO

This CSIR SO guide explains how the Council of Scientific and Industrial Research recruits Section Officers as of October 2026. It covers the last full CASE cycle (CASE-2023), the separate 2026 drive that recruited Section Officers from UPSC Civil Services candidates, eligibility, the exam pattern, syllabus, salary, previous cut-offs and a practical preparation plan.

It also explains how the SO post differs from the Assistant Section Officer (ASO) post, because many pages mix the two.

Table of Contents

What is CSIR SO?

CSIR SO refers to the Section Officer post in the Council of Scientific and Industrial Research (CSIR), the government body that runs a network of national laboratories across India. It is a Group B Gazetted administrative post at Pay Level 8. Section Officers supervise general administration, finance and accounts, or stores and purchase work at CSIR headquarters in New Delhi and in its laboratories, so the post is filled in three cadres: General, Finance and Accounts, and Stores and Purchase.

CSIR recruits Section Officers mainly through the Combined Administrative Services Examination (CASE), a national-level exam it conducts for both SO and ASO posts. CASE does not follow a fixed yearly calendar: the last full cycle was CASE-2023, and in 2026 CSIR also filled 8 SO posts from non-recommended UPSC CSE-2024 candidates. The exam is open to Indian graduates up to 33 years of age, with relaxation for reserved categories, and it attracts a large field: CASE-2023 received 4,75,688 applications for 444 SO and ASO posts. For SO, selection runs through Paper I and Paper II (CBT), Paper III (descriptive) and an interview.

CSIR SO at a Glance

Latest Update: Where CSIR SO Recruitment Stands

CSIR has used two routes to fill Section Officer posts in recent years. Knowing which route a notice belongs to matters, because the eligibility and stages are completely different.

Route 1: CASE (open competitive exam)

The last full CASE cycle was CASE-2023, advertised for 444 posts (76 SO and 368 ASO). Its key dates were:

As of 28 October 2026, CSIR has not announced CASE-2025 or CASE-2026. Any page quoting fresh CASE dates or vacancies without an official CSIR notice is guessing. The pattern and syllabus on this page follow the CASE-2023 advertisement, which is the latest official reference.

Recruitment from UPSC Civil Services non-recommended candidates (2026)

In January 2026, CSIR advertised 8 Section Officer posts (Advt. No. E-I/RC/2026/1) only for candidates who appeared in the UPSC Civil Services Examination 2024 and were listed as non-recommended on the UPSC Pratibha Setu portal. There was no written test by CSIR. Candidates were shortlisted on their CSE-2024 marks and then interviewed.

This drive is complete. The next CASE or a similar drive will be announced on the CSIR website, so keep checking the recruitment section there and treat any unofficial date as tentative.

CSIR SO vs CSIR ASO: Key Differences

SO and ASO are recruited through the same CASE exam and share Papers I, II and III, but the posts, pay and final stage differ. Testkart has a separate CSIR ASO page; the table below sums up how the two compare.

In CASE-2023, candidates gave their preference for posts (SO and ASO) and cadres in the application, and CSIR allocated them on merit and preference. Because SO is a higher post with fewer seats, its cut-off sits well above the ASO cut-off.

CSIR SO Vacancy Details

2026 drive (UPSC CSE-2024 route)

CASE-2023 (last CASE cycle)

CSIR describes vacancies as provisional in every notice, so the final number can change. Vacancies for the next cycle are not known yet.

CSIR SO Eligibility

Educational qualification

Candidates need a university degree in any discipline from a university or institution recognised by the Government of India. The final result must be declared on or before the closing date of the application.

Age limit

The upper age limit is 33 years, counted on the closing date of the online application. In the 2026 drive this date was 4 February 2026.

Other conditions

• Nationality: Only Indian citizens can apply.

• Government employees: A No Objection Certificate from the employer is needed at document verification.

• Route-specific rule: The 2026 drive was open only to non-recommended UPSC CSE-2024 candidates. CASE is open to all eligible graduates.

For relaxation rules and edge cases, see the detailed CSIR SO eligibility guide.

Application Fee and How to Apply

CASE-2023 also exempted CSIR departmental candidates from the fee. Applications are accepted online only:

1. Open the recruitment section of the CSIR website and select the active advertisement.

2. Register with your mobile number and email ID (the 2026 drive also asked for the UPSC roll number).

3. Fill in personal, education and category details, then upload the photograph, signature and documents.

4. Pay the fee online where applicable and submit before the closing time.

5. Save the submitted form and payment receipt for later stages.

In the 2026 drive, the photograph and signature had to be JPG files under 50 KB each, and other documents PDFs under 1 MB each. Check the specifications again in the next notice.

CSIR SO Exam Pattern

The CASE pattern below is from the CASE-2023 advertisement, the latest official CASE scheme.

Objective papers carry 1 mark per question with a deduction of 0.33 marks for each wrong answer. Papers are bilingual except the English section of Paper I, and Paper III can be written in English or Hindi.

What this means for you:

• Paper II is the biggest block: 200 of the 350 Stage I marks come from Paper II, so its eight subjects deserve the most practice time.

• Guessing is costly: Three wrong answers wipe out roughly one correct answer, so attempt only questions you can narrow down.

• Writing counts: Paper III adds 150 marks to the merit list, which is why regular essay practice separates selected candidates.

Some pages still show 0.25 negative marking or list the CPT as an SO stage. Follow the official advertisement. The full breakdown is on the CSIR SO exam pattern page.

CSIR SO Syllabus Summary

The topic-wise checklist with suggested starting points is on the CSIR SO syllabus page.

CSIR SO Selection Process

Through CASE, the Section Officer selection runs in this order:

1. Stage I (Paper I and Paper II): Candidates must reach the minimum threshold in aggregate out of 350 to qualify for Stage II.

2. Stage II (Paper III): Candidates must reach the threshold in aggregate of Papers I, II and III (out of 500) to be called for interview.

3. Interview (100 marks): Held for SO candidates only.

4. Final merit (out of 600): Based on Papers I, II, III and the interview, followed by document verification and cadre allocation on merit and preference.

CSIR may normalise scores when the CBT runs in multiple shifts. For SO ties, CASE-2023 used higher written marks first, then fewer negative marks, then age. In the 2026 UPSC route, merit was the CSE-2024 total plus the 350-mark CSIR interview.

CSIR SO Salary and Career Growth

Take-home pay depends on DA rates and the city's HRA class, so any in-hand figure you see online is an estimate, not an official number. Section Officers manage administrative sections and can move to higher administrative grades under CSIR's promotion rules.

How to Prepare for CSIR SO

Stage I preparation

• Build Paper II first: Reasoning and arithmetic need daily practice, while ethics, management and decision making reward concept clarity and case-style questions.

• Read for General Awareness: Cover modern Indian history, polity and governance from standard books, and keep monthly current affairs notes.

• Fix English basics: Grammar rules, vocabulary and one comprehension passage a day cover most of the 50 marks.

Stage II and interview preparation

• Write weekly: One timed essay, one precis and one formal letter each week from the second month onward.

• Know the organisation: Read about CSIR's role, laboratories and administrative structure before the interview.

Mock tests and official practice

CSIR does not publish a public mock test for CASE. For CASE-2023, the official Stage I notice said the mock test link would be emailed to registered candidates, so check your inbox and spam folder after applying. All official updates appear on the CSIR website.

Official website: https://www.csir.res.in/

CSIR SO Cut-off Reference

The official CASE-2023 final result notice (2 January 2025) gave these minimum marks for empanelment as Section Officer, out of 600:

Cut-offs change every cycle with difficulty, vacancies and the number of applicants. Treat these figures as a benchmark only and aim for a clear margin above them. Category-wise detail, including PwBD and the 2026 route, is on the CSIR SO cut-off page.