Job Description
Marble Arch Consulting Group (MAC) is seeking an experienced Network & Security Engineer to join our Managed Services team in Alexandria, Sydney.
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You'll help maintain the operational health of the network and security infrastructure we manage for our customers. This hands-on role covers enterprise routing and switching, wireless, load balancing and security platforms, with opportunities to resolve complex incidents, deliver approved changes and support new solution implementations.
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As an experienced member of the team, you'll act as an escalation point for junior engineers, take a leading role during major incidents and contribute to the team's technical development.
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We're interested in capable engineers, not applicants who match every keyword. Equivalent platforms and demonstrable practical experience will be considered.
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You'll join a collaborative team where you can broaden your technical experience, work across varied customer environments and make a visible contribution to the continued development of our managed services.
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What you'll be doing
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Monitor customer network and security environments and respond to alerts
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Investigate and resolve incidents, service requests and work orders within agreed SLAs
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Lead the resolution of complex and major incidents
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Own tickets throughout their lifecycle, coordinating with vendors and technical teams
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Implement standard and approved changes, including occasional out-of-hours changes
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Support Cisco routing, switching and wireless infrastructure
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Operate and support Fortinet security platforms
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Develop runbooks, knowledge articles and operational procedures
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Onboard and maintain customer devices within SolarWinds and PRTG
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Provide accurate handovers for open incidents and in-flight changes
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Mentor junior engineers and support their technical development
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Assist with implementations,



migration planning, testing and as-built documentation
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Support the successful transition of new solutions into production
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Contribute to service reporting and continuous improvement
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What you'll bring
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Three to five years' hands-on experience supporting enterprise network and security infrastructure
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Experience gained in an MSP, enterprise service desk or comparable operational setting
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Operational experience with Fortinet FortiGate and FortiManager
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Cisco routing and switching experience, including Catalyst and ASR
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Experience with Cisco Nexus/NX-OS and/or Cisco wireless technologies such as Prime, WLC, Spaces or ISE
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Experience working within ITIL incident, change and problem-management processes
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Experience using network monitoring and IT service-management or ticketing systems
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Cisco CCNA or equivalent knowledge demonstrated through practical experience
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A structured approach to troubleshooting and incident resolution
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Clear written and verbal communication skills
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Willingness and eligibility to work staggered rostered hours and participate in an on-call rotation
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Desirable, but not essential
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Palo Alto firewalls and Panorama
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Zscaler Branch Connector or Zscaler Internet Access
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Aruba switching, wireless or ClearPass
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Cisco CUCM or Webex Cloud
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F5 or comparable load-balancing platforms
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MPLS and SD-WAN
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ServiceNow, SolarWinds or PRTG
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Network scripting or automation
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CCNP, Fortinet certification, ITIL Foundation or relevant tertiary qualifications
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What we offer
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We invest in our engineers and provide training based on individual development needs. This may include:
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Fortinet security training
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Cisco and Zscaler specialist courses
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Cisco and Aruba wireless technologies
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F5 load balancing
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SolarWinds and PRTG administration
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ITIL certification
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📌 Network & Security Engineer (New South Wales)
🏢 Marble Arch Consulting
📍 New South Wales