Research OrganizationSpace Technology, Satellite Systems & Rocket Launch VehiclesDirect CBT Exam

Indian Space Research Organisation (ISRO)

Recruitment Blueprint • Engineering Trainee & Scientific Officer Preparation

ISRO is India's national space agency under the Department of Space. Scientist/Engineer 'SC' positions are recruited by the ISRO Centralised Recruitment Board (ICRB) through a nationwide written examination (CBT) followed by an in-depth personal interview.

Notice Verification: Verified September 2026

GATE Requirement: No (Direct Examination)

Recruited Engineering Branches:

MechanicalECECSE/ITEECivil

Eligibility Criteria & Standards

Last Verified: Verified September 2026

Qualifying Degree

B.E. / B.Tech or equivalent in first class with an aggregate minimum of 65% marks or 6.84/10 CGPA

Minimum Aggregate Marks

65% aggregate (all semesters averaged)

Age Requirements

Maximum 28 years (relaxations for reserved categories as per GOI norms)

GATE Paper / Nationality

Indian Citizen

Notice: Eligibility criteria and category relaxations are periodically updated. Always verify against the organization's definitive official recruitment notification at https://www.isro.gov.in/Careers.html before submitting an application.

Recruitment Stages & Evaluation Weightage

ICRB Written Test (CBT)

50% Final Weightage (or qualifying for interview shortlist)

Part 'A': Core Discipline Questions (80 Qs, 80 Marks). Part 'B': Aptitude / Reasoning (15 Qs, 20 Marks). Total 100 Marks.

Comprehensive Technical Interview

50% Final Weightage (Minimum 60% marks in interview required to qualify)

Detailed technical interview covering core engineering fundamentals, spacecraft/launch vehicle applications, and academic projects.

Exam & CBT Test Pattern Architecture

Testing Parameter	Pattern Specification
Total Questions	95 Questions
Exam Duration	120 Minutes (2 Hours)
Technical Discipline Weight	80 Marks / Questions
General Aptitude & Reasoning	15 Marks / Questions
Negative Marking Scheme	0.33 marks deducted per incorrect answer

Discipline-Specific Blueprints

Technical Syllabus by Engineering Branch

Commonly tested core topics based on documented public examinations and national GATE blueprints.

Mechanical Engineering

Fluid Mechanics & Rocket Propulsion (Cryogenic, Solid, Liquid Motors)
Thermodynamics & Heat Transfer in Spacecraft Thermal Control
Strength of Materials, Machine Design & Vibrations
Manufacturing Technology & Precision Machining
Orbital Mechanics & Satellite Dynamics

Electronics (ECE)

Satellite Communication (Transponders, Link Budget Analysis)
Microwave Engineering, Antennas & Wave Propagation
Digital Signal Processing (DSP) & Telemetry/Telecommand (TT&C)
Control Systems & Satellite Attitude Control
VLSI & Radiation-Hardened Electronics

Computer Science (CSE/IT)

Real-Time Systems & Mission-Critical Software Engineering
Data Structures & Algorithms
Operating Systems & Concurrency Control
Computer Networks & Space Data Protocols (CCSDS)
Computer Architecture & Fault-Tolerant Computing

Interview Evaluation & Viva Architecture

Interview Format: In-Depth Technical Interview before ISRO Center Scientists

Panel Composition: 5-7 Senior Scientists / Mission Directors

Primary Evaluation Focus Areas:

Clear understanding of fundamental engineering physics and mechanics
Ability to derive mathematical formulas from basic principles
Spacecraft subsystems: Power (Solar/Batteries), TT&C, Propulsion, Attitude & Orbit Control (AOCS)

Strategic Preparation Roadmap

1Solve all ISRO ICRB previous 15 years' question papers: ISRO questions heavily test conceptual clarity without lengthy algebraic calculations.
2In the interview, panels test your passion for space systems: read up on Chandrayaan, Gaganyaan, Aditya-L1, and launch vehicle architectures (PSLV, GSLV, LVM3).
3Maintain minimum 60% marks in the interview: even a high written exam score will not guarantee selection if interview cutoff is not met.

Interactive Assessment Simulation

Practice & Diagnostic Test Papers

Unofficial original practice questions inspired by commonly tested skills. Not official previous examination papers.

Mechanical & ECE/CS Core⏱ 20 Mins

ISRO ICRB Scientist/Engineer 'SC' Diagnostic Paper

📋 15 Questions • Negative Marking: 0.33

Launch Diagnostic Test

Official Source & Independence Disclaimer:InterviewJobs.in is an independent educational portal and is not affiliated with Indian Space Research Organisation (ISRO), government recruitment boards, or official examination authorities. All organizational names and logos are used strictly as factual identifiers. Always check the official website (https://www.isro.gov.in/Careers.html) for definitive dates, notifications, and rules.