DRDO Recruitment: 6 Entry Routes + Eligibility Checklist

Who actually conducts DRDO recruitment?

DRDO recruitment is run by three different bodies, and knowing which one handles your target post is the first thing to get right.

• RAC (Recruitment and Assessment Centre) — recruits Scientists into the Defence Research and Development Service (DRDS), a Group 'A' Gazetted cadre. Advertisements are numbered sequentially and published on rac.gov.in and in Employment News.
• CEPTAM (Centre for Personnel Talent Management) — recruits technical and administrative staff such as Senior Technical Assistant-B and Technician-A. Advertised on drdo.gov.in with its own portal at ceptam.drdo.in.
• Individual DRDO laboratories — GTRE Bengaluru, DIBT, DGRE, ADA, ARDE and roughly fifty others recruit Junior Research Fellows, Research Associates, apprentices and project staff directly, each on its own schedule.

RAC states plainly on its site that advertisements for Junior Research Fellowships and apprenticeship positions are posted on the DRDO website rather than RAC's, and that RAC does not handle student internship queries at all. That single sentence explains why so many students watching only rac.gov.in conclude that DRDO never hires — they are watching the wrong page for the opportunities they qualify for.

RAC also warns that unauthorised websites impersonate it in search results, and advises typing the URL directly into the browser rather than following a link. Given how many DRDO-branded job sites exist, that is worth following literally.

What are the entry routes into DRDO?

There are six practical entry routes into DRDO, and they differ in qualification, selection method and where they are advertised.

The practical reading of that table: a fresh BE/B.Tech graduate has exactly one permanent-cadre route (Scientist 'B'), and it is gated by GATE. Everything else available to a fresher is either a fellowship, an apprenticeship or a contract project post — valuable experience, but not a permanent government position.

That is not a reason to skip them. A JRF at a DRDO lab puts defence R&D on your CV and inside the building where the work happens, which matters when you later apply through RAC. But apply with clear eyes about what each route is.

How does Scientist 'B' recruitment work?

Scientist 'B' is DRDO's entry-level permanent scientist post, in the DRDS Group 'A' Gazetted cadre at Level 10 of the Pay Matrix.

The sequence in a typical RAC cycle:

1. Advertisement published on rac.gov.in and in Employment News, listing item numbers by discipline. Each item is effectively a separate mini-recruitment with its own vacancy count and eligibility.
2. Online application through the RAC portal against the specific item numbers you qualify for.
3. Administrative screening of applications against the eligibility conditions.
4. Challenge/review window, during which candidates can query their screening status and upload a review document. This window is short and closes on a fixed date and hour.
5. Technical screening, then in some disciplines an online preliminary interview.
6. Final personal interview, with candidates self-scheduling from a published calendar.

Two things about eligibility that trip candidates up. First, age limits are set per advertisement and have been revised mid-cycle before — in the revised Advt No. 145, RAC raised the DRDO Scientist 'B' age limit from 28 to 35 years for unreserved candidates, with 38 for OBC (non-creamy layer) and 40 for SC/ST. Never rely on an age limit quoted in a blog, including this one; read the live advertisement.

Second, the discipline items are narrow. A cycle may advertise Electronics & Communication, Mechanical, Computer Science, Electrical, Metallurgy, Chemical, Aeronautical, Civil, Petroleum, Production and Industrial Engineering, and separate science subjects such as Physics, Chemistry, Mathematics and Geology & Geophysics. Which of those appear, and how many posts each carries, changes every cycle based on lab requirements.

Beyond Scientist 'B', RAC runs lateral recruitment at Scientist 'C', 'D' and 'E' grades for candidates with prescribed experience. These are small, specialised drives — Advertisement No. 157, released on 30 May 2026 with a 19 June 2026 deadline, carried 33 such vacancies. If you are a working engineer rather than a fresher, this is the route to watch, and it moves quickly when it opens.

Is GATE compulsory for DRDO?

For direct recruitment to Scientist 'B', yes. RAC states that candidates are required to possess a valid GATE score in the relevant discipline for which GATE is conducted, including the disciplines of Engineering Sciences, Life Sciences, and Humanities & Social Sciences.

For every other DRDO route, no. CEPTAM's STA-B and Technician-A recruitment runs on its own computer-based tests and does not use GATE. Apprenticeships are typically interview-based. JRF and Research Associate positions at labs commonly ask for NET or GATE qualification, but the requirement varies by advertisement and some run on walk-in interviews and written tests conducted by the lab itself.

So the honest answer for a B.Tech student is: GATE is the only key to the permanent scientist cadre, and it is irrelevant to most of the other doors into the same organisation.

One warning that comes straight from RAC's own public notice. While processing applications against an earlier advertisement, RAC found candidates who had entered incorrect GATE scores and uploaded modified scorecards. Those candidates were debarred from applying against any DRDO vacancy for three years. Your GATE score is verified against the official record. Enter it exactly as it appears.

What is CEPTAM recruitment for STA-B and Technician-A?

CEPTAM recruitment fills DRDO's technical support cadre and opens on qualifications far below a B.Tech, which makes it the widest-access route into the organisation.

The CEPTAM-11 cycle gives a representative picture. The notification was released on 11 December 2025 for 764 vacancies — 561 Senior Technical Assistant-B and 203 Technician-A — with applications closing on 11 January 2026 after an extension. The Tier-I computer-based test was held on 23 March 2026, results were declared on 25 May 2026, and the Tier-II examination followed on 15 June 2026.

Three points worth knowing before you target this route. Tier-I is a screening test covering general science, English, quantitative aptitude and reasoning, and it carries negative marking. Merit is prepared on Tier-II performance, so clearing Tier-I is necessary but contributes nothing to your final rank. And the trade test for Technician-A is qualifying in nature rather than merit-adding.

If you hold a B.Tech and are considering STA-B as a backup, read the cycle notification carefully rather than assuming you qualify. CEPTAM notifications specify their qualification bands precisely, and whether a higher degree helps or disqualifies you is a question the notification answers and no blog should.

What routes exist if you are still studying?

Students and recent graduates have three DRDO routes that do not require a permanent-cadre vacancy to exist: apprenticeships, fellowships and internships.

Apprenticeships run at individual labs under the Apprentices Act framework. As an example of scale and terms, DIBT advertised six Graduate Apprentice posts for BSc, BE and B.Tech holders aged 21 to 28, with a stipend of ₹12,300 per month, selection by interview and no application fee, with applications closing 15 September 2026. GTRE Bengaluru runs its own apprenticeship training programme with separate selection lists. These are small intakes advertised lab by lab, which is exactly why they are less contested than you would expect.

Junior Research Fellowships and Research Associate positions are the research route. DRDO labs advertise these in batches — an August–September 2026 cycle covered roughly 52 fellowship positions across five laboratories in disciplines including mechanical, electronics, computer science, physics, chemistry, mathematics, civil, materials science and quantum technologies. Selection runs through walk-in interviews, written tests or application shortlisting depending on the lab. A DGRE advertisement in the same period listed a JRF fellowship of ₹37,000 per month with walk-in interviews held in Chandigarh.

Internships are handled by DRDO directly, not RAC, and guidelines are published on the DRDO website. RAC explicitly does not respond to internship queries, so email to RAC about an internship goes nowhere.

The practical advice for a second or third-year student: you cannot apply for Scientist 'B' yet, so use this window for an internship or, after graduating, a JRF. Both put you inside a lab, and lab experience is what makes your eventual RAC interview different from every other candidate's.

What happens after you apply?

DRDO recruitment moves slowly and in stages, and the silence between stages is normal rather than a sign that something went wrong.

After the application window closes, applications go through administrative screening against eligibility conditions. Results appear at your candidate login on the RAC website, not by email. A challenge window then opens for a fixed period — often a few weeks, closing at a stated hour — during which you can query your screening status and upload a review document. Miss that window and the status stands.

Technical screening follows for those who clear administrative screening. Some disciplines then run an online preliminary interview before the final personal interview. RAC's status board shows cycles where these stages ran across many months, with different disciplines progressing at different speeds inside the same advertisement.

The interview scheduling deserves its own warning. Shortlisted candidates select their own interview date from a calendar that opens for a fixed period of about five days, with dates released incrementally — half at a time, only between 10:00 and 16:00 — on a first-come-first-served basis. Candidates are notified by SMS or email to log in and choose. If you are not watching, the convenient dates go. RAC's own advice is to visit the website at least twice a week, and it means that literally.

Two limitations to hold in mind. First, an advertised vacancy is not a guaranteed selection. RAC's status board records advertisements cancelled due to inadequate response, and individual discipline items cancelled because too few administratively eligible candidates applied. Second, the process routinely spans a year or more from advertisement to result. Do not stop preparing for other opportunities while a DRDO application is pending.

DRDO or ISRO: which should you target?

Both DRDO and ISRO recruit BE/B.Tech graduates into Level 10 of the Pay Matrix, so the choice comes down to the entry gate and the kind of work, not the starting pay.

The practical answer for most engineering students is to prepare for both, because the gates are different and do not conflict. GATE preparation covers your core branch syllabus in depth, and that same depth is what ISRO's discipline-specific paper tests. One year of serious branch revision serves both applications.

Where they genuinely differ is discipline breadth. If your background is Metallurgy, Chemical, Petroleum, Civil, Psychology or a pure science, DRDO advertises items in those areas in a way ISRO's engineering-focused notifications generally do not. If you are set on space systems specifically, ISRO is the direct route and DRDO is not a substitute for it.

For the current ISRO cycle, eligibility, exam pattern and deadlines are covered separately in our ISRO recruitment guide.

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The DRDO Route-Selection and Application Checklist

Two parts. Part A tells you which route you qualify for. Part B is what to do once you know.

Part A — Find your route (10 minutes)

1. Class 10 plus ITI? → CEPTAM Technician-A. Watch drdo.gov.in. GATE is irrelevant to you.
2. Diploma in Engineering or B.Sc? → CEPTAM STA-B. Watch drdo.gov.in.
3. BE/B.Tech, still studying? → Internship now, apprenticeship or JRF after graduating. Watch individual lab pages on drdo.gov.in, not rac.gov.in.
4. BE/B.Tech graduate, no GATE score? → You cannot apply for Scientist 'B'. Register for the next GATE, and meanwhile target JRF, apprentice or project posts.
5. BE/B.Tech first class with a valid GATE score? → Scientist 'B' through rac.gov.in is your primary route.
6. Degree plus prescribed years of experience? → Watch rac.gov.in for Scientist 'C'/'D'/'E' lateral advertisements, which open and close fast.

Part B — Before the next advertisement drops

1. Bookmark rac.gov.in and drdo.gov.in by typing the URLs directly. Do not reach either through a search-result link you have not verified.
2. Set a recurring twice-weekly reminder to check both. RAC's own guidance is to visit at least twice a week, and its status updates appear nowhere else.
3. Keep your GATE scorecard PDF saved and your score, year and registration number noted exactly as printed.
4. Keep a scanned document set ready: degree certificate, consolidated marksheet, category certificate if applicable, ID proof, photograph and signature in standard formats.
5. Note your aggregate percentage and CGPA exactly as printed on the certificate. Do not convert between them; central recruiters frequently disallow it.
6. If you are employed in a government or government-owned organisation, start the process for intimation to your cadre controlling authority now. RAC cycles have required declaration forms with hard deadlines.

Part C — After you apply

1. Save your registration number and a printout of the submitted application.
2. Log into the candidate portal weekly. Screening results and challenge windows appear there, not in your inbox.
3. Diarise the challenge window closing date and hour the moment it is announced.
4. When the interview calendar opens, log in on day one during working hours. Dates are released in halves on a first-come-first-served basis.
5. Keep preparing for other opportunities. Cycles run for a year or more, and some are cancelled outright.

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Common Mistakes

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Frequently Asked Questions

Is GATE compulsory for DRDO recruitment?

GATE is compulsory for direct recruitment to Scientist 'B'. RAC requires a valid GATE score in the relevant discipline, including Engineering Sciences, Life Sciences and Humanities & Social Sciences. GATE is not required for CEPTAM's STA-B and Technician-A posts, apprenticeships, or most lab-level project positions, which use their own selection methods.

What is the difference between RAC and CEPTAM?

RAC, the Recruitment and Assessment Centre, recruits Scientists into DRDO's DRDS Group 'A' cadre and advertises at rac.gov.in. CEPTAM, the Centre for Personnel Talent Management, recruits technical and administrative staff such as Senior Technical Assistant-B and Technician-A, advertising on drdo.gov.in. They run separate applications, separate portals and separate selection processes.

Can a diploma holder get a job in DRDO?

Yes. CEPTAM's Senior Technical Assistant-B route is open to candidates with a diploma in engineering or a B.Sc in a relevant discipline, and Technician-A opens on Class 10 plus an ITI certificate in a relevant trade. Selection runs through a Tier-I screening test followed by a subject-specific Tier-II test.

What is the DRDO Scientist 'B' salary?

Scientist 'B' is a Group 'A' Gazetted post in the DRDS cadre at Level 10 of the Pay Matrix, the same entry level as ISRO's Scientist/Engineer 'SC'. Dearness Allowance, House Rent Allowance and other central government allowances apply on top of basic pay, and the exact in-hand figure depends on your posting location.

Can final-year students apply for DRDO Scientist 'B'?

Eligibility conditions are set in each advertisement, and RAC cycles have generally required the qualifying degree to be complete. Final-year students should target internships now and apprenticeships or Junior Research Fellowships after graduation, while sitting GATE so a valid score is in hand when the next Scientist 'B' advertisement opens.

How long does DRDO recruitment take?

Longer than most candidates expect. RAC cycles routinely run for a year or more from advertisement to result, moving through administrative screening, a challenge window, technical screening, sometimes a preliminary interview, and a final interview. Different disciplines within the same advertisement progress at different speeds.

Why do DRDO advertisements get cancelled?

RAC's public status board records advertisements and individual discipline items cancelled because too few administratively eligible candidates applied, and occasionally for administrative reasons. An advertised vacancy is a requirement, not a commitment, so keep other applications active while a DRDO cycle is pending.

Where are DRDO apprenticeships and fellowships advertised?

On the DRDO website and on individual laboratory pages, not on the RAC portal. RAC states that Junior Research Fellowship and apprenticeship advertisements are posted on the DRDO website. Because each lab advertises separately and intakes are small, these openings are easy to miss and less contested than centralised drives.

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Conclusion

DRDO is not one recruitment process, it is three, and most candidates lose time watching the wrong page. Find your route first: GATE and RAC if you hold a first-class BE/B.Tech with a valid score, CEPTAM if you hold a diploma or ITI, and lab-level fellowships or apprenticeships if you are still finishing your degree.

Then set up the habit that actually decides outcomes here — checking both portals twice a week, because screening statuses, challenge windows and interview calendars appear on the portal and nowhere else, and each of them closes on a deadline that is not going to be emailed to you.

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