Job Description

Position Overview

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We are seeking an experienced Level 3 Network Engineer to provide advanced network support across a critical Operational Technology (OT) environment. The role focuses on enterprise networking, network security, load balancing, proxy services, and network time synchronisation.
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Key Responsibilities

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Provide Level 3 support for complex network incidents, problems, and outages.
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Configure, maintain, and troubleshoot Dell PowerSwitch network infrastructure.
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Administer and troubleshoot Palo Alto Firewalls, including policies, NAT, VPNs, and routing.
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Support F5 Load Balancers, including virtual servers, pools, health monitors, and SSL/TLS.
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Support and troubleshoot Squid Proxy services and configurations.
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Maintain and troubleshoot Trimble GPS Clock and network time synchronisation services.
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Troubleshoot TCP/IP, DNS, DHCP, VLANs, routing, switching, VPNs, and network connectivity.
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Perform root-cause analysis and implement permanent solutions.
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Support network security, segmentation, hardening, and vulnerability remediation.
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Perform network installations, upgrades, maintenance, and technology refresh activities.
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Maintain network documentation, diagrams, configurations, and operational procedures.
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Work with vendors and internal teams to resolve complex technical issues.
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Essential Skills & Experience

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5+ years' experience in network engineering or a similar technical role.
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Proven Level 3 network troubleshooting and support experience.
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Solid hands-on experience with Dell PowerSwitch or equivalent.
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Strong experience with Palo Alto Firewalls.
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Experience with F5 Load Balancers.
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Experience with Squid Proxy or equivalent proxy technologies.
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Experience with Trimble GPS Clock, NTP, PTP, or network time synchronisation.
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Solid knowledge of TCP/IP, VLANs, routing, DNS, DHCP, VPNs, NAT, and network security.
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Experience with network monitoring and diagnostic tools such as Wireshark and tcpdump.
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Robust problem-solving and root-cause analysis skills.
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Ability to work independently and support critical operational environments.
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Experience in OT, utilities, energy, mining, manufacturing, or other critical infrastructure is highly desirable.
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📌 Level 3 Network Engineer, Sydney New South Wales (Australia)
🏢 Nexon Asia Pacific
📍 Australia