ISRO Recruitment Selection Process — Stage-wise Complete Guide

ISRO Recruitment Selection Process — this page explains the full, evergreen multi-stage selection process for the ISRO Recruitment examination conducted by Indian Space Research Organisation (ISRO). Use it to plan your preparation timeline; the cycle-specific dates and venue allotment for any particular cycle are the ones printed in the official ISRO Recruitment notification PDF on isro.gov.in.

Overview of the ISRO Recruitment selection process

ISRO Recruitment follows a structured, multi-stage process designed to test aptitude, subject knowledge, physical and medical fitness (where applicable) and personality. The standard stages, in order, are:

1. ICRB written examination / centre-specific Computer-Based Test
2. Online application within the announced window on isro.gov.in
3. Skill / Trade Test for technical cadres, where prescribed
4. Personal Interview at ISRO designated venue (for Scientist / Engineer SC)
5. Document Verification and Pre-employment Medical Examination

Each stage is qualifying for the next. Marks from screening stages may or may not be carried forward to the final merit list — the weightage formula is defined in the official notification for the cycle.

Stage-wise structure

The screening stage (typically a computer-based test) is the gatekeeper for the rest of the process. It filters candidates against a category-wise cut-off and shortlists a multiple of the notified vacancies for the next stage. The subsequent main/written stage tests deeper subject knowledge. Skill tests, physical tests, medical tests and personality tests follow, depending on the cadre.

Computer-Based Test (CBT) stage

The CBT stage is conducted at designated centres allotted by ISRO. It is an objective multiple-choice paper administered through a secure browser. Candidates report to the centre with the printed admit card, valid photo ID and the prescribed number of passport-size photographs as instructed in the admit card. The duration of the paper, the number of sections, the marks per question and the negative-marking ratio are restated in the official notification for each cycle.

Physical Efficiency / Measurement Test

Where physical standards are prescribed for the post (for example, defence services and uniformed cadres recruited through ISRO), candidates clearing the CBT are called for the Physical Efficiency Test (PET) and Physical Measurement Test (PMT). The PET tests endurance through prescribed events such as running, long jump and high jump, with separate norms for male and female candidates. The PMT measures height, chest and weight against the standards in the notification. Both PET and PMT are qualifying in nature — marks are not added to the final score but failure leads to elimination.

Personality / Interview / SSB stage

For officer-level cadres in defence and Group A/B services, ISRO Recruitment includes a personality assessment stage — a personal interview for civil services posts, and the multi-day Services Selection Board (SSB) procedure for defence services. The personality stage tests communication, reasoning under pressure, situational judgment, leadership and group behaviour. The exact format, duration and weightage of the personality stage are defined in the official notification.

Document Verification

Candidates clearing the prior stages are called for Document Verification (DV). The originals and one set of self-attested photocopies of all certificates claimed in the application form must be produced. Any mismatch between the application data and the originals can lead to disqualification at DV — cross-check carefully before reporting.

Pre-Recruitment Medical Examination

The final stage is a Pre-Recruitment Medical Examination (PRME) conducted by the medical authority designated for the cadre. The medical standards (visual acuity, colour perception, hearing, general physical condition) are spelled out in the official notification. Candidates classified TEMPORARY UNFIT are typically allowed a review medical board; those classified PERMANENT UNFIT for the post are not appointed. Refer to the notification for the exact medical standards and appeal procedure.

Final merit list and posting

The final merit list is prepared as per the weightage formula in the notification and posts are allotted in order of merit and post preference, subject to category-wise vacancies and reservation rules. Posting locations vary by cadre and are governed by the cadre-specific transfer policy. The final allotment order, training schedule and reporting date are issued by the appointing authority after due verification.

What to focus on at each stage

• CBT: sectional speed and accuracy, negative-marking discipline, familiarity with the official mock interface.
• Main written: deeper subject mastery, descriptive-answer structure where applicable, time-bound mock attempts.
• PET/PMT: consistent endurance training over 8–12 weeks; do not rely on last-minute crash programmes.
• Personality / SSB / Interview: current affairs reading, situational role-play practice, mock interviews with realistic stress.
• DV: document folder organised in the order of the application form; nothing missing, nothing in the wrong format.
• PRME: general fitness, eye check-up well in advance, no last-minute medication that could affect medical clearance.

How to verify any update for ISRO Recruitment

The single authoritative source for ISRO Recruitment updates is the official Indian Space Research Organisation portal at isro.gov.in. Every paragraph on this page is written from the long-term, evergreen structure of ISRO Recruitment — the post profile, the selection process and the broad shape of the syllabus and exam pattern. Specifics such as the exact application window, the cycle-wise vacancy count, the precise application fee, the cut-off marks, the venue allotment, the answer key release schedule and the final result date are always cycle-specific. For those, open the latest official notification PDF on isro.gov.in and read the relevant clause directly.

We refresh this page when Indian Space Research Organisation publishes new ISRO Recruitment information so that the structural details here stay aligned with the latest official guidance. We do not publish unverified release dates, leaked answer keys, rumoured vacancy splits or unofficial cut-off claims. If a date is uncertain, this page will say so plainly and point you to the official notification rather than guess.

Things to avoid while preparing for ISRO Recruitment

• Do not rely on a single coaching prediction for the application window or the exam date — the only binding source is the official ISRO notification on isro.gov.in.
• Do not assume that age relaxation, fee or syllabus weightage from a previous cycle automatically applies to the current cycle. Reservation clauses and fee structures are restated in every notification.
• Do not trust unofficial answer keys, leaked papers or social-media cut-off claims; the official answer key window is the only safe input for raw-score estimation.
• Do not delay document collection. Class 10, Class 12, graduation, category, EWS, PwBD and ID proofs in the prescribed format should be ready before the application window opens — a missing certificate at verification can lead to disqualification.
• Do not skip the official mock test on the ISRO portal before the computer-based stage — familiarity with the testing interface saves crucial minutes on exam day.

Related ISRO pages

Use the related links below to navigate between the eligibility, syllabus, exam-pattern, admit-card and result pages for ISRO Recruitment and other PSU & Engineering Govt Jobs pages on this site. All of these pages follow the same evergreen, verification-first structure.