Senior Systems Administrator

Role Overview

• Deliver advanced operational support, escalation, and continuous improvement across customer and internal environments.
• Play a key role in maintaining platform health, resolving complex issues, driving standardisation, and mentoring engineers.
• Ensure services meet agreed SLAs and security standards.
• Work closely with Service Delivery Managers, project teams, and customer stakeholders to support technical outcomes across various platforms.
• Act as a senior escalation point for complex incidents, problems, and requests across multiple customer environments.
• Perform root cause analysis (RCA), implement permanent fixes, and reduce recurring issues through strong problem management.
• Maintain and uplift monitoring, alerting, patching, and operational health across managed services platforms.
• Participate in on-call/after-hours support per roster requirements (where applicable).
• Administer and optimise Microsoft Windows Server environments and core services (AD DS, DNS, DHCP, GPO, etc.).
• Manage Windows 10/11 endpoint configuration, hardening, patching, and lifecycle activities.
• Support identity and access, including Active Directory and Entra ID (Azure AD), MFA, conditional access, and SSO where applicable.
• Administer Microsoft 365 services including Exchange Online, Teams, SharePoint Online, OneDrive, Entra ID, Intune/Endpoint Manager and Microsoft security features as relevant to customer environments.
• Support platform changes, migrations, improvements, and service optimisation initiatives.
• Deploy, maintain, and troubleshoot virtual environments across VMware vSphere and Microsoft Hyper-V.
• Administer enterprise backup and recovery solutions including Veeam and Commvault.
• Conduct backup health checks, restore testing, DR support, and recovery activities during incidents.
• Create and maintain automation to improve service quality and reduce manual effort (PowerShell and Ansible strongly preferred).
• Develop and maintain SOPs, KB articles, and technical standards; ensure documentation quality and reusability.
• Identify service improvement opportunities and contribute to tool uplift and standardisation.
• Provide technical guidance and uplift capability across the Managed Services engineering team.
• Mentor and support junior engineers/administrators, contributing to training pathways and knowledge maturity.
• Support the technical direction of the organisation by evaluating tools and proposing improvements.

Requirements

• Strong troubleshooting skills with the ability to validate and test completed solutions for usability and stability.
• Proven experience supporting Microsoft server and workstation environments in a multi-customer/MSP context.
• Strong Microsoft 365 administration skills (Exchange Online, Teams, SharePoint/OneDrive, Entra ID; Intune desirable).
• Strong virtualisation experience across VMware and Hyper-V .
• Demonstrated experience with backup and recovery platforms, including Veeam and Commvault .
• Automation mindset with strong scripting capability (PowerShell strongly preferred).
• Exceptional interpersonal and customer relationship skills; ability to communicate clearly with technical and non-technical stakeholders.
• Ability to take ownership, work autonomously, and manage competing priorities effectively in a service environment.
• Excellent documentation and change discipline; comfortable working within ITIL-aligned processes (incident/request/change/problem).
• Strong stakeholder management and vendor relationship skills; keeps abreast of new technologies.
• Strong MS Office skills, including Outlook, Word, Excel, Visio and Project.
• Professional Certifications and/or expert knowledge in one or more of the following disciplines (highly regarded): Windows Server and core systems concepts including AD, GPO, DNS, DHCP, NTP etc. Microsoft 365 / Entra ID / Intune Virtualisation products and solutions (VMware / Hyper-V) Backup systems and solutions (Veeam / Commvault ) Storage systems and solutions Cloud systems and solutions Security systems Networking systems and solutions.

Tech Stack

• Ansible
• Azure
• Cloud
• DNS
• VMware

Benefits

• Career growth via succession planning, internal mobility programs, and mentorship opportunities.
• Ongoing investment in professional development through industry certifications.
• Employee benefits, recognition, and wellbeing platform.
• Mental health support through our Employee Assistance Program.
• Support for family and caring responsibilities, including paid parental leave.
• Employee referral program, with monetary incentives offered.
• Commitment to supporting Australia’s veterans.