Network Security and Systems Administrator

Overnewton Anglican Community College is seeking an experienced and proactive Network Security & Systems Administrator to join our ICT team on full-time basis for a fixed term period of one year with a possibility of ongoing.

This is an exciting opportunity for a skilled IT professional to play a key role in securing, managing, and enhancing the College's network, systems, and digital infrastructure.

Working closely with the Director of ICT and IT Manager, you will be responsible for the administration and continuous improvement of the College's cybersecurity posture, Microsoft and Apple environments, network infrastructure, identity management systems, and disaster recovery capabilities.

Why Overnewton

• 24/7 free counselling through our Employee Assistance Program

• Free annual flu vaccinations and a robust pastoral care program.

• Learning and development opportunities through supported study programs

• Strong internal promotion pathways

• Dedicated to child safety, non-discrimination and ethical practices.

• Free onsite parking

Key Responsibilities

• Administer and maintain network security technologies including firewalls, VPNs, NAC, IDS/IPS, and security monitoring platforms.

• Manage identity and access services across Active Directory, Microsoft Entra ID, and Microsoft 365, supporting the College's passwordless authentication strategy.

• Conduct security assessments, risk reviews, patch management, vulnerability remediation, and compliance activities.

• Support Microsoft Purview, Data Loss Prevention (DLP), data classification, and information governance initiatives.

• Co-manage Microsoft Server, Exchange, SQL, Azure, Microsoft 365, Intune, VMware vSphere, and Hyper-V environments.

• Support Apple ecosystems including Jamf and Apple School Manager.

• Maintain wired and wireless network infrastructure, including switching, NAC, and Juniper Mist environments.

• Develop and maintain documentation, disaster recovery plans, and business continuity processes.

• Provide technical guidance to ICT team members and contribute to strategic technology initiatives across the College.

Key Selection Criteria

You are an experienced infrastructure and security professional with strong technical expertise and a passion for delivering secure, reliable, and innovative IT services. You possess:

• Demonstrated experience in network security administration and cybersecurity best practices.

• Strong knowledge of Microsoft cloud, identity, and infrastructure technologies.

• Experience managing enterprise Microsoft and Apple environments.

• Excellent troubleshooting, documentation, and problem-solving skills.

• Experience with security audits, compliance, incident response, and disaster recovery planning.

• Relevant tertiary qualifications in Information Technology or a related discipline.

• Minimum 3 years' experience in a senior systems administration, infrastructure, or network security role.

• A current Working with Children Check (or willingness to obtain one).

How to apply

Please apply directly through Seek, applications should include:

• A brief cover letter addressing the Key Selection Criteria and outlining why you are the ideal candidate for the position (maximum two pages).

• A CV, of no more than three pages, documenting key responsibilities and achievements in previous roles

Should you have any questions about this role, please email [email protected]

Please note that applications close at 4:00 PM on Friday 18 September 2026. We will be reviewing applications as they are received, so we encourage you to apply early.

About us

Overnewton Anglican Community College is a proudly inclusive learning community dedicated to excellence, diversity, and belonging. As an independent Prep - Year 12 school, we nurture academic growth and the development of character, providing pathways for all students to thrive. Participation in a wide range of co-curricular and leadership opportunities inspire students to embrace purpose, serve their communities, and lead lives with heart and integrity.