ISRO Scientist Selection Process 2025: Procedures & Exam Pattern

ISRO Scientist/Engineer recruitment 2025 follows a two-stage selection process—a written test and an interview. Candidates must qualify both stages to be considered for final selection. In this blog, we provide a detailed breakdown of the ISRO Scientist/Engineer ‘SC’ selection process for 2025.

ISRO Scientist Recruitment 2025 Highlights

ISRO Scientist Selection Process 2025 – Complete Details

Candidates applying for the ISRO Scientist/Engineer ‘SC’ posts will undergo a two-stage selection process that includes a written examination followed by a personal interview. The final selection will be based on the cumulative performance in both stages.

Stage 1: Written Examination

• The written exam will be held at 11 exam centres across India, including major cities such as Bengaluru, Chennai, Mumbai, and New Delhi.
• ISRO may revise the test venue depending on administrative requirements.
• Candidates will receive call letters via email on their registered IDs.

Exam Pattern

• Total Duration: 2 hours (PwBD candidates will get extra time)
• Type of Questions: Multiple Choice Questions (MCQs)
• Structure:

• • Part A – Technical Section:

    • 80 MCQs based on the relevant engineering discipline

    • Each question carries 1 mark

    • Negative marking: ⅓ mark will be deducted for each wrong answer

  • Part B – Aptitude Section:

    • Up to 15 MCQs carrying a total of 20 marks

    • Topics include reasoning (numerical, abstract, diagrammatic, logical, deductive)

    • No negative marking in this section

Stage 2: Interview

• Based on written test scores, candidates will be shortlisted in a 1:5 ratio per vacancy (with a minimum of 10 candidates).
• Additional candidates from reserved categories will also be shortlisted separately.

Interview Assessment Criteria (Total 100 Marks):

• Graduated from top institutions (IITs, IISc, NITs, NIRF Top 20): 3 marks
• CGPA ≥ 9 or >85%: 4 marks
• CGPA 7.5–9 or 71%–85%: 2 marks
• Rank holder (Top 3) in the institute: 3 marks

Qualifying Marks

• The final merit list will be prepared by assigning equal weightage to the marks obtained in the written test and the interview – 50% each.
• In the case of a tie, the following will be considered in order:

1. 1. Higher marks in the written exam

   2. Better academic performance in the qualifying degree

   3. Seniority by age (older candidates will be preferred)

ISRO Scientist 2025 Notification PDF

For complete and official details regarding the ISRO Scientist/Engineer 2025 recruitment such as post-wise vacancies, educational qualifications, age limit, PwBD reservation, and selection process—candidates are advised to refer to the official notification. Click the link below to download the ISRO Scientist 2025 notification PDF.

ISRO Scientist 2025 Vacancy Details

ISRO Scientist 2025 Eligibility Details

Educational Qualification:
Candidates must hold a BE/B.Tech or equivalent degree in the relevant engineering discipline with a minimum aggregate of 65% marks or CGPA 6.84/10. The disciplines required are:

• Electronics & Communication Engineering (for Electronics posts)
• Mechanical Engineering (for Mechanical posts)
• Computer Science Engineering (for Computer Science posts)

Candidates completing their final year in the academic year 2024-25 can also apply, provided their final degree is awarded by 31.08.2025 and they meet the minimum marks criteria.

Note:

• Allied disciplines may be acceptable as per ISRO guidelines.
• For universities issuing both CGPA and percentage, at least one criterion must meet eligibility.
• For CGPA-only universities, CGPA must meet ISRO standards; conversion formulas are not accepted.
• In Dual/Integrated degree cases, CGPA/percentage relevant to graduation level or as specified by the university will be considered.

Age Limit:
The upper age limit is 28 years as on 16.06.2025. Age relaxation is applicable for serving Central Government employees, Ex-Servicemen, and Persons with Benchmark Disabilities as per Government of India rules.

Reservation for Persons with Benchmark Disabilities (PwBD):

• Specific vacancies are reserved for PwBD candidates across different disability categories (A to E), including visual, hearing, locomotor, and multiple disabilities.
• Candidates must submit a valid Disability Certificate at the time of the interview, confirming at least 40% disability, issued by a Medical Board as per the Rights of Persons with Disabilities Act, 2016.

How to Apply for ISRO Scientist/Engineer Posts 2025

• Apply online only via the official ISRO website between 27 May and 16 June 2025.
• Candidates can apply for multiple posts but must select the same exam center for all applications.
• Separate application fees must be paid for each post applied.
• After registration, candidates will get a Registration Number—keep it safe for future reference.
• A valid email ID is mandatory during application.
• Application fee: ₹250 per post (non-refundable).
• Processing fee: ₹750 per application (refundable after written exam attendance).
• Fees are payable online via Bharatkosh portal using:

  • Internet Banking

  • UPI

  • Debit Cards (Domestic)

  • Credit Cards (Domestic)

• Candidates in government or public sector jobs must submit a No Objection Certificate (NOC) at the time of interview.
• No documents (except photo & signature) to be uploaded online; originals must be produced during interview.
• Ensure correct bank details are provided for refund processing.
• Check payment status on ISRO’s website 24 hours after payment.
• Late payments or incomplete applications will not be accepted.

ISRO Scientist 2025: Pay Scale and Benefits

Candidates selected for the Scientist/Engineer ‘SC’ role will join at Level 10 of the Pay Matrix, earning a starting basic salary of ₹56,100 per month. In addition to the basic pay, the following allowances will be provided in accordance with government norms:

• Dearness Allowance (DA)
• House Rent Allowance (HRA)
• Transport Allowance

These benefits are supplemented by coverage under the New Pension Scheme (NPS)/Unified Pension Scheme. Further perks include:

• Medical care for employees and their dependents
• Subsidized canteen facilities
• Availability of limited housing quarters as an alternative to HRA
• Leave Travel Concession (LTC)
• Group Insurance benefits
• House Building Advance

All these are governed by Central Government rules and policies.

Key Instructions and Conditions for ISRO Scientist 2025 Applicants

• Appointees may be assigned to any ISRO Centre or Unit across India and can be transferred as needed by the organization.
• The number of vacancies advertised is tentative; ISRO reserves the right to alter the number based on requirements.
• Although the posts are temporary, they are likely to continue for an extended period.
• Candidates appearing for the interview will be reimbursed for second-class or sleeper-class train fare for travel between their declared hometown and the interview venue. No travel allowance will be paid for attending the written exam.
• It is mandatory to present original documents confirming the details submitted in the application during the interview.
• Providing false or incorrect information may lead to disqualification and denial of travel reimbursement.
• Only Indian citizens are eligible to apply for these positions.
• ISRO has the discretion to fill or not fill any of the advertised vacancies.
• For any clarifications, candidates should first consult the FAQs available on the ISRO website. Further questions can be emailed to rmt-icrb@isro.gov.in. Queries already addressed in the advertisement or FAQs will not be entertained.
• All official communication will be sent via the candidate’s registered email ID and posted on the ISRO website. Candidates are advised to monitor their email inboxes regularly, including spam or junk folders.
• Any attempt at canvassing or influence in any form will lead to immediate disqualification.
• Candidates must carefully adhere to all eligibility criteria and application guidelines. Failure to comply with deadlines or instructions will result in cancellation of candidature without any further appeal.