C4i Solutions Tech Stack

Defence and critical-infrastructure cyber security and ICT services

Technology, Information and Internet Sydney, New South Wales 11–50 employees Privately Held

C4i Solutions delivers cyber, ICT, and digital solutions to Australia's defence, government, and critical-infrastructure sectors. The tech stack—Windows, SAP, Linux, Tenable, Splunk, Wazuh, Azure, AWS, Cisco, Fortinet—reflects a mature, compliance-heavy environment. Active hiring is split evenly between engineering and security roles at senior and mid levels, while projects cluster around ATO (Authority to Operate) processes, CSAAF compliance, and defence-system integration, signaling sustained demand for sovereign, security-vetted capabilities.

Tech Stack 20 technologies

Core StackSAP Linux Ansible Splunk AWS Cisco Windows Server Windows PowerShell Bash Tenable Nessus Tenable.sc Tenable.io Wazuh Azure Red Hat Fortinet FortiGate ITIL Windows Deployment Services

What C4i Solutions Is Building

◆Challenges

Ensuring compliance with defence frameworks
Achieving authority to operate
High-pressure secure ict projects
Supporting classified defence systems
Continuous improvement in cyber security governance
Maintaining authority to operate
Managing risk in classified environments
Ensuring availability and resilience
Reducing operational impact
Maintaining compliance and security

▲Active Projects

Csaaf ato processes
Continuous improvement in cyber security governance
Core security artefacts development
Essential eight implementation
Csaaf assessment and authorisation
Ato workflow management
Defence cyberworthiness system (dcws) integration
Developing core security artefacts for csaaf
Maintain csaaf artefacts
Dr planning and testing

Hiring Activity

Accelerating25 roles · 10 in 30d

Department

Engineering

Security

Logistics

Ops

Support

Seniority

Senior

Mid

Junior

Lead

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About C4i Solutions

C4i Solutions is a veteran-owned, Australian-headquartered firm specializing in ICT, cyber, and digital solutions for defence, government, space, emergency services, and critical-infrastructure operators. Founded in 2017, the company operates a permanent, security-vetted workforce and works with industry partners to deliver end-to-end system design, integration, and security services—from concept through deployment. The organisation's mission focus is protecting critical ICT assets against emerging threats in highly regulated, high-stakes environments where compliance frameworks (CSAAF, ATO, Essential Eight) and risk management in classified settings are operational requirements.

HeadquartersSydney, New South Wales

Company Size11–50 employees

Hiring MarketsAustralia

Frequently Asked Questions

What tech stack does C4i Solutions use?

Windows, SAP, Linux, Tenable, Nessus, Splunk, Wazuh, Azure, AWS, Red Hat, Cisco, and Fortinet FortiGate. The mix reflects compliance, vulnerability management, and multi-cloud infrastructure for defence and critical-infrastructure workloads.

What is C4i Solutions working on?

Projects centre on ATO workflows, CSAAF compliance and artefacts, Essential Eight implementation, cyber-governance improvement, and defence-system integration (DCWS). Work includes DR planning and continuous compliance in classified environments.