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System Administrator

Employment Hero -
Sydney NSW

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Job Details

Full-time | Contract
$20,000 - $25,000 a month
8 hours ago

Qualifications

Authentication
Performance tuning
TCP
Azure
Computer Science
Ansible
Disaster recovery
Administrative experience
DHCP
AWS
Analysis skills
Bachelor's degree
Virtualisation
Scripting
DNS
Telecommunication
SAN
VMWare
RHCE
AI
RHCSA
Communication skills
vSphere
ESXi
Information Technology

Full Job Description

AI Job Summary

Minimum 3–5 years as a Linux System Administrator/VMware Administrator/Infrastructure Engineer in enterprise and telecom
Proven VMware vSphere/ESXi/vCenter experience incl. VM provisioning, clustering, HA, DRS, and vMotion
Experience installing/configuring/administering Linux (RHEL/CentOS/Ubuntu/SUSE or equivalent), incl. hardening, patching

Role Type

Contract • Full-time • Mid-level Senior

Pay Rate

$20,000 AUD – $25,000 AUD (Month)

Description

Overview

We are seeking a skilled System Administrator with strong Linux and VMware expertise to support and maintain enterprise infrastructure within a Telecommunication environment in a Managed Services team. The successful candidate will be responsible for managing Linux servers, VMware virtualization platforms, system performance, security, and operational stability while ensuring high availability of critical telecom and business systems.

This role operates in a 24/7 managed services setup supporting large-scale telecom infrastructure, where stability, performance, and rapid incident resolution are critical.

Key Responsibilities

Install, configure, administer, and maintain Linux server environments (Red Hat, CentOS, Ubuntu, SUSE, or equivalent).
Manage and support VMware vSphere, ESXi hosts, vCenter, virtual machines, and associated infrastructure components.
Perform server provisioning, patch management, upgrades, and system hardening activities.
Monitor infrastructure health, capacity, performance, and availability across physical and virtual environments in a telecom production environment.
Troubleshoot Linux OS, VMware, storage, and networking issues impacting telecom services.
Configure and maintain user accounts, permissions, authentication services, and security policies.
Support backup, disaster recovery, and business continuity processes aligned with telecom SLAs.
Implement and maintain system monitoring and automation tools used in managed services operations.
Perform root cause analysis and proactively resolve infrastructure incidents within SLA timelines.
Create and maintain technical documentation, operational procedures, and system configurations.
Collaborate with network, storage, backup, security, and telecom operations teams.
Participate in 24/7 on-call support and shift-based operations as required in managed services delivery.

Required Experience

Minimum 3–5 years of experience as a Linux System Administrator, VMware Administrator, or Infrastructure Engineer.
Strong hands-on experience in enterprise and telecom-grade environments.
Proven experience managing VMware vSphere, ESXi, vCenter, VM provisioning, clustering, and virtualization technologies.
Experience with server performance tuning, monitoring, patching, and troubleshooting in production environments.
Knowledge of storage technologies including SAN, NAS, and virtual storage environments.
Experience supporting enterprise backup and disaster recovery solutions.
Familiarity with scripting and automation using Bash, Shell, Python, or Ansible.

Technical Skills

Linux Administration

Red Hat Enterprise Linux (RHEL)
CentOS / Rocky Linux
Ubuntu Linux
Linux Server Hardening
Package Management
System Performance Tuning

Virtualization

VMware vSphere
VMware ESXi
VMware vCenter
High Availability (HA)
Distributed Resource Scheduler (DRS)
VM Migration (vMotion)

Infrastructure

DNS, DHCP, NTP
TCP/IP Networking
SAN & NAS Storage
Backup & Recovery Solutions
Monitoring Tools (enterprise/telecom OSS tools preferred)

Automation & Scripting

Bash/Shell Scripting
Python
Ansible
Infrastructure Automation

Preferred Qualifications

Bachelor’s degree in Information Technology, Computer Science, Engineering, or a related discipline.
VMware Certified Professional (VCP) certification preferred.
Red Hat Certified System Administrator (RHCSA) or Red Hat Certified Engineer (RHCE) preferred.
Experience with cloud platforms such as AWS, Azure, or Google Cloud is advantageous.
Experience in Telecommunication Managed Services operations or NOC/SOC environments is highly desirable.
Strong troubleshooting, analytical, and communication skills.

Key Attributes

Strong problem-solving and diagnostic abilities in high-pressure telecom environments.
Ability to work independently and within cross-functional managed services teams.
Excellent documentation and communication skills.
Proactive approach to infrastructure reliability, security, and continuous improvement.
Ability to work in shift-based and SLA-driven operational environments.

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