About the role

The Senior Systems Engineer is responsible for the design, implementation, automation, monitoring, and support of critical telecommunications infrastructure that underpins carrier-grade network services. The role ensures the availability, reliability, security, and performance of systems supporting telecommunications operations, customer services, network management platforms, and business-critical applications.

Working within a complex and highly available environment, the Senior Systems Engineer will lead the administration of Red Hat Linux platforms, virtualization infrastructure, authentication services, monitoring systems, and automation frameworks while supporting the operational requirements of a 24x7 telecommunications network.

What you’ll be doing

Telecommunications Infrastructure Operations

- Design, deploy, and support highly available infrastructure supporting telecommunications platforms and network services.
- Ensure infrastructure stability and resilience across production, disaster recovery, and testing environments.
- Support systems that enable OSSplatforms, network management systems, authentication services, and customer-facing applications.
- Participate in network and infrastructure upgrades, maintenance activities, and technology refresh programs.

Linux Platform Engineering

- Administer and maintain enterprise-scaleRed Hat Enterprise Linux (RHEL) environments.
- Manage operating system lifecycle activities, patching, vulnerability remediation, and compliance standards.
- LeverageRed Hat Satellitefor system provisioning, patch management, configuration control, and reporting.

Automation & DevOps

- Develop and maintain automation solutions usingAnsibleto streamline deployment, configuration, and operational processes.
- Create and maintainPythonscripts and tools to improve operational efficiency and reduce manual intervention.




- Drive Infrastructure-as-Code and automation best practices across operational environments.

Authentication & Network Services

- Administer and supportRADIUSinfrastructure for customer, network device, and operational authentication services.
- Work closely with network engineering teams to support AAA (Authentication, Authorization, and Accounting) platforms.
- Troubleshoot authentication, access control, and integration issues across network and application environments.

Virtualisation & Platform Management

- Manage and support enterpriseVMwareinfrastructure including ESXi, vCenter, cluster management, storage integration, and high availability services.
- Perform capacity planning, resource optimization, and infrastructure performance tuning.

Monitoring & Observability

- Design and maintain operational dashboards, monitoring, and alerting usingGrafana.
- Develop proactive monitoring solutions for systems, applications, and telecommunications platforms.
- Identify trends and operational risks through data analysis and performance metrics.

Database Administration

- Support and maintainMySQLdatabases supporting operational and customer service platforms.
- Perform backup management, recovery testing, performance tuning, replication management, and troubleshooting.

Incident & Problem Management

- Act as a senior escalation point for complex systems and infrastructure issues.
- Perform root cause analysis of major incidents, implementing permanent corrective actions.
- Support 24x7 operational environments through participation in on-call and after-hours support rosters.

Security & Compliance





- Implement security hardening standards across Linux, virtualized, and database platforms.
- Ensure compliance with telecommunications security, operational, and regulatory requirements.
- Support vulnerability management and remediation programs.

Leadership & Mentoring

- Provide technical leadership and guidance to engineers within the Infrastructure and Operations team.
- Contribute to architecture reviews, technology roadmaps, and continuous improvement initiatives.
- Mentor junior engineers and promote engineering best practices.

What you’ll bring to the role

Essential

- Minimum 7+ years of experience in Systems Engineering, Infrastructure Engineering, or Platform Operations roles.
- Advanced administration ofRed Hat Enterprise Linux (RHEL).
- Strong experience withAnsibleautomation and configuration management.
- Proficiency inPythonscripting and automation.
- Experience managingVMware vSphere, ESXi, and vCenter environments.
- Robust knowledge ofGrafanamonitoring and dashboard development.
- Administration and support ofMySQLdatabases.
- Experience withRed Hat Satellite.
- Experience supportingRADIUSauthentication environments.
- Strong troubleshooting skills across Linux, virtualization, authentication, and database technologies.
- Bachelor’s degree in information technology, Engineering, Computer Science, or equivalent industry experience.

Telecommunications Experience

- Experience operating in a telecommunications, ISP, carrier, or managed network services environment.
- Knowledge of carrier-grade availability requirements and operational practices.
- Familiarity with OSS/BSS platforms and network management systems.
- Understanding of AAA services, network authentication, and telecommunications operational processes.
- Experience supporting systems that operate in 24x7 environments.

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📌 Systems Engineer (Sydney)
🏢 Colonial Group
📍 Sydney