Senior Systems Administrator
Sydney | Contract Opportunity
I'm working with a client undertaking a significant infrastructure security uplift program and they're looking for an experienced Senior Systems Administrator to support a range of Windows and Linux server initiatives.
This role will suit someone who is equally comfortable working across both operating systems and has experience delivering security-focused infrastructure projects within enterprise environments.
What you'll be doing
* Building and configuring Windows and Linux servers following established standards and procedures
* Supporting Essential Eight maturity and broader cyber security uplift initiatives
* Deploying and managing Microsoft Defender across server environments, including Linux
* Rolling out application control and server hardening solutions across Windows and Linux platforms
* Working closely with infrastructure, security and project teams to improve server security posture
* Assisting with operational support, troubleshooting and platform optimisation
What we're looking for
* Strong Systems Administration experience across both Windows and Linux environments
* Experience supporting Essential Eight maturity programs or security uplift projects
* Hands‐on experience deploying and managing Microsoft Defender for Endpoint
* Exposure to application control technologies and endpoint security tooling
* Experience building and configuring servers from documented procedures and standards
* Strong troubleshooting skills and a security‐first mindset
* Excellent communication and stakeholder engagement skills
Nice to have
* Experience in regulated or enterprise‐scale environments
* Exposure to vulnerability remediation programs
* Knowledge of infrastructure security best practices and hardening frameworks
If you're a senior infrastructure professional who enjoys working across both Windows and Linux and wants to contribute to a major security transformation program, I'd love to have a confidential chat.
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