Systems Administrator

Location: Watsons Bay, Sydney NSW
Working Arrangement: Onsite (5 days per week at HMAS Watson)
Employment Type: Full-time
Security Clearance: NV2 required

Overview

Cleared Recruitment is partnering with a leading organisation delivering advanced capabilities in simulation, training, and mission-critical technology environments supporting Defence operations.
This is an opportunity to join a highly secure and purpose-driven environment where your work directly contributes to operational readiness and national security outcomes. You will be part of a collaborative and technically skilled team, supporting complex ICT systems in a Defence training setting.

The Opportunity

We are seeking a Systems Administrator to support the configuration, maintenance, and ongoing reliability of ICT systems in a mission-critical environment.
This role will see you responsible for ensuring the performance, availability, and security of networked systems and servers, while supporting high-fidelity training systems used in Defence operations. You will troubleshoot complex issues, contribute to system hardening, and operate within strict cybersecurity frameworks.

Key Responsibilities

• Manage user accounts, access controls, and authentication processes
• Perform system maintenance, updates, and patching across Windows and Linux environments
• Monitor system performance, availability, and security, escalating issues where required
• Maintain documentation, procedures, and onboarding materials
• Support infrastructure across servers, networks, and associated systems
• Contribute to system hardening and compliance with Defence security requirements

Skills and Experience

Essential

• Strong experience administering Windows and Linux systems
• Understanding of network infrastructure including switches, routers, and firewalls
• Experience with patching, system maintenance, and hardening practices
• Knowledge of cybersecurity principles and secure system operations
• Strong troubleshooting and problem-solving skills
• Ability to work onsite in a secure, high-tempo Defence environment

Qualifications

• Bachelor’s degree in Computer Science, Information Technology, or related field (or equivalent experience)
• Active NV2 Australian Defence Security Clearance

Desirable

• Microsoft Certified Systems Administrator (MCSA) or similar
• Cisco Certified Network Associate (CCNA) or equivalent
• Experience working within Defence or government environments

Working Environment

• Highly secure, mission-critical Defence setting
• Onsite role located at HMAS Watson
• Collaborative team supporting complex training systems and infrastructure

Why Apply?

• Work on systems that directly support Defence capability
• Join a high-performing and technically capable team
• Opportunity to build experience in secure, high-assurance environments
• Long-term career development within Defence industry

Diversity and Inclusion

We are committed to fostering an inclusive and diverse workplace and welcome applications from candidates of all backgrounds and experiences.

Veterans

Candidates with Defence or Federal Government experience are strongly encouraged to apply. Your experience is highly valued, and support is available to assist your transition.