Network Systems Administrator

Be the technical expert our clients trust when it matters most

Are you an experienced systems and network professional who enjoys solving complex technical problems, improving client environments and delivering support that makes a genuine difference?

Lanrex is looking for a capable and customer-focused Network Systems Administrator to join our Managed Services team in Macquarie Park.

This is a hands-on role for someone who can confidently support on-premises and cloud environments, take ownership of escalated technical issues and communicate clearly with clients throughout the resolution process.

You will work across systems, networks, servers, Microsoft cloud services, virtualisation, remote access and vendor technologies. The role combines reactive technical support with proactive maintenance, optimisation, documentation and project delivery.

What you’ll be doing

In this role, you will:

• Provide second and third level support across client systems and network infrastructure
• Diagnose, own and resolve complex incidents and service requests
• Support Microsoft technologies, including Windows Server, Microsoft 365, Active Directory, Exchange, SQL Server and SharePoint
• Troubleshoot WAN and LAN connectivity, routers, firewalls, VPNs, security, virtualisation and remote access environments
• Support VMware, Microsoft virtualisation, Remote Desktop and Citrix environments
• Perform proactive maintenance, monitoring and optimisation across client environments
• Identify recurring issues, root causes and opportunities for automation
• Maintain accurate technical documentation, configuration records, ticket notes and knowledge articles
• Contribute technical expertise to infrastructure projects, scopes of work and implementation planning
• Complete testing, documentation and handover for implemented changes
• Keep clients informed through clear, professional and timely communication
• Collaborate with internal teams, vendors and telecommunications carriers to progress issues through to resolution

What success looks like

You take ownership of technical issues and work methodically through to resolution or appropriate escalation. You balance urgency with quality, identify root causes rather than relying on quick fixes, and leave client environments more stable and supportable.

You communicate clearly, document your work properly and share your knowledge with others. You understand that great technical support is not only about solving the problem, but also about giving the client confidence throughout the process.

Success in the role means:

• Client infrastructure is stable, reliable and maintained with fewer repeat issues
• Technical incidents are resolved through structured diagnosis and sound judgement
• Clients receive clear updates and understand progress, risks and next steps
• Monitoring, maintenance and automation improve service reliability and efficiency
• Technical documentation enables consistent support across the team
• Project changes are implemented cleanly and transition into support without avoidable rework

What you’ll bring

You will ideally have:

• Demonstrated experience in systems and network administration or infrastructure support
• Experience resolving escalated infrastructure issues
• Practical deployment and change experience
• Strong knowledge of Microsoft server and cloud technologies
• Experience with identity and access management, networking, virtualisation, backup and disaster recovery, remote access and infrastructure monitoring
• Experience working with PSA, ticketing, RMM and technical documentation platforms
• Relevant IT qualifications, certifications or equivalent demonstrated industry experience
• A structured and disciplined approach to troubleshooting
• Strong written and verbal communication skills
• The ability to manage competing priorities and follow work through to completion
• A commitment to quality, accountability and positive client outcomes

Experience in an MSP environment and familiarity with technologies such as Microsoft 365, Azure, Entra ID, Intune, Hyper-V, VMware, Citrix, Fortinet, ConnectWise, N-central, IT Glue or PowerShell will be highly regarded.

Why join Lanrex?

At Lanrex we focus on delivering reliable, practical technology outcomes that support our clients and strengthen their organisations.

You’ll join a collaborative and welcoming team that values accountability, customer focus, continuous learning and doing what we say we will do.

We offer:

• A flexible workplace that supports different ways of working
• Modern, professional offices in Macquarie Park
• Onsite parking
• A great team culture with regular team-building and social activities
• Career development opportunities to help you build your skills and progress
• Supported workplace training and practical learning opportunities
• Exposure to a broad range of clients, technologies and environments
• A collaborative team that shares knowledge and works together to solve problems
• The opportunity to contribute ideas and improve how our services are delivered

Our values guide how we work

• Embrace Change
• Unified Resolution
• Delivering on Our Promises
• Developing Self & Others
• Be Authentically You

Ready to join us?

If you are a technically capable systems and network professional who enjoys taking ownership, solving problems and creating a positive client experience, we would love to hear from you.

Apply now with your résumé and a short cover letter outlining the experience and strengths you would bring to the Lanrex Managed Services team.