Windows Administrator – Secure Infrastructure

About the role

As a Windows Administrator within Leidos Australia’s AGO GEO SPACES program, you will support advanced national‑security capabilities by delivering and maintaining secure, high‑availability infrastructure. Working with specialist technical professionals, you will ensure critical systems remain reliable, secure and operational in a highly regulated environment.

Key responsibilities

• Provide Level 2 and Level 3 support for complex Microsoft Windows infrastructure, resolving incidents and maintaining performance of mission‑critical systems.
• Administer and optimise Windows Server environments, Active Directory, Group Policy and VMware platforms to deliver secure and reliable services.
• Manage development, packaging, deployment and lifecycle of applications and Standard Operating Environments using MECM.
• Support and maintain physical and virtual infrastructure, including HP OneView and GreenLake platforms, while adhering to security and compliance frameworks.

Required profile

• Experienced infrastructure professional comfortable working in secure, complex technical environments.
• Collaborative mindset with a commitment to operational excellence and strong troubleshooting abilities.

Required skills

• Administration of Microsoft Windows Server 2016, 2019 and 2022.
• Active Directory and Group Policy management, including identity and access management.
• MECM application packaging, deployment and SOE lifecycle management.
• VMware virtual infrastructure administration.
• Level 2 and Level 3 incident response and troubleshooting in enterprise settings.
• Experience with HP OneView and GreenLake platforms (advantage).

What we offer

• Flexibility such as Life Days (up to 12 extra days off), part‑time, job‑sharing and compressed hours.
• Wellbeing support including free Headspace and MeQuilibrium access and dedicated wellness spaces.
• Learning opportunities with over 120 000 on‑demand courses and professional development programmes.
• Work on nationally significant defence and government projects that have real impact.
• Career development pathways and investment in technical or leadership growth.