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Linux system administrator city of sydney

Sydney
Cognizant
System Administrator
Posted: 21 May
Offer description

About the Role

As a Linux Systems Administrator, you will make an impact by designing and executing automated, zero-touch patch management workflows that keep our large-scale virtual infrastructure secure, compliant, and running at peak performance. You will be a valued member of the Infrastructure & Cloud Operations team and work collaboratively with your manager, peer systems engineers, and security and compliance stakeholders.

In this role, you will:

* Design, develop, and maintain Ansible playbooks, roles, and Automation Platform (AAP) workflows to automate OS patching, kernel upgrades, service restarts, and pre/post-patch validation across RHEL/Ubuntu and VMware ESXi environments
* Manage and troubleshoot VMware ESXi hosts and virtual machines via vCenter/ESXi API, including snapshot management, guest tool updates, and host patching
* Own compliance and reporting by ensuring all servers meet security standards, generating automated compliance reports, and maintaining thorough patch documentation
* Manage infrastructure as code using Git for version-controlled Ansible playbooks, enforcing idempotent configuration across the workplace
* Provide L2/L3 incident support for Linux and VMware issues, conducting root cause analysis to prevent recurrence and performing daily administration tasks including user management, LVM, SAN/NFS storage, and security hardening

What You Need to Have to Be Considered

* Hands‐on Red Hat Enterprise Linux (RHEL) and/or CentOS administration experience; RHCSA or RHCE certification preferred
* Proven expertise writing and implementing Ansible playbooks, roles, and workflows using Ansible Tower, AWX, or Ansible Automation Platform (AAP)
* Solid working knowledge of VMware vSphere/ESXi 7.x or 8.x, including VM provisioning, datastore management, and host patching via vCenter
* Proficiency in Bash or Python scripting for task automation, along with familiarity with patching tools such as Red Hat Satellite and YUM/DNF
* Working knowledge of TCP/IP, DNS, SSH, NFS, and SAN/LVM storage concepts

These Will Help You Stand Out

* Experience with Git, GitLab, or Jenkins for automation workflow orchestration and CI/CD pipeline management
* Familiarity with infrastructure as code (IaC) principles and maintaining idempotent configuration at scale
* Background in generating automated security compliance reports and documenting patch outcomes for audit purposes
* RHCE certification or VMware Certified Skilled (VCP) designation

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