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The Digital and Intelligence Service

C4 Expert (C4X)

C4 (Command, Control, Communications, Computers) Experts (or C4X) anchor MINDEF/SAF’s cyber defence and digital solutions.

Last updated 10 February 2026

In the digital track, C4Xs cultivate digital competencies ranging from software engineering, data science and artificial intelligence, to cloud architecting. Software are now lines of operations. C4Xs are digital warfighters who conceptualise and develop digital solutions across a full spectrum of operations.

In the cyber track, C4Xs build strong expertise in security monitoring, cyber incident response, vulnerability assessment and penetration testing, malware analysis and cyber forensics. They defend against potential aggressors who use digital tools to weaken our nation. They also conduct cyber threat intelligence operations to detect potential threats to Singapore.

Requirements

Basic Requirements

  • Singapore Citizen

  • Singapore Permanent Resident intending to take up Singapore Citizenship

Academic Requirements

Academic Requirements for C4X

Education Level

Relevant Course of Studies

Placing in university or Undergraduate

  • Computer Engineering

  • Computer Science

  • Data Science and Artificial Intelligence

  • IT / Computing related courses such as Information Systems / Information Security / Technology, Game Design, etc

Starting rank and salary

Salary guidelines for C4X

Starting rank

Starting salary

ME4 - 1

S$4,180 - S$6,780

ME4 - Trainee

S$3,280 - S$6,090

Gross Monthly Salary includes:

  1. Basic Salary Component: This includes a Monthly Variable Component and is pegged to your rank and grade.

  2. Allowances: Skilled-based allowances (where applicable)

    • Market Adjustable Specialisation Component (MASC): MASC is tied to the specialisation and level of expertise of the Military Expert.

Training progression

Training Phases and Duration for C4X

Training Phase

Duration

Basic Military Training

3 months

Military Domain Expert Course Phase 1 (OCS):

  • SAF Leadership Training

  • DIS Service Term

  • Professional Term

  • Joint Term

9.5 months

Military Domain Expert Course Phase 2 (OCS)

1 month

Learning and growth

At the DIS, knowledge is our key business, and you are our best asset. To help you stay on top of your game, you will be expected to learn, grow and adapt continuously. We offer multiple opportunities for professional development and continuous education.

To continually hone specialised competencies across the diverse roles within the DIS,
we have development pathways for:

  • Leadership and management

  • Military domain knowledge and skills

  • Sponsorships for academic upgrading ranging from diploma, degree to post-graduate programmes

  • Industry-recognised professional certifications

Professional Certifications offered to individual based on their specialisation and scope of work:

  • International Information Systems Security Certification Consortium (ISC)2

  • Global Information Assurance Certification (GIAC)

Interested to become a C4 Expert (C4X)?

Apply here

Find out more about Scholarships & Sponsorships.