Top Network Engineer Jobs in Sydney

Designs reference architectures for AI data center networks, including L2/L3 fabrics, BGP, EVPN/VXLAN, RoCEv2, and QoS. Builds and operates labs to qualify switches, NICs, and network operating systems; performs interoperability and performance testing; reproduces complex customer issues; and troubleshoots congestion, packet loss, MTU, latency, PFC, and ECN behavior. Documents best practices, develops automation, collaborates with vendors and internal teams, and provides feedback to product R&D.

Design, implement, support, and optimize enterprise network infrastructure for a large-scale data centre transformation program. Responsibilities include routing and switching, migration delivery, troubleshooting, performance improvements, testing, transition activities, and stakeholder engagement across technical and business teams.

Network Engineer Intern supporting Cisco’s APJ Customer Proof of Concept team in Sydney. Responsibilities include preparing and maintaining network testbeds, troubleshooting technical issues, enhancing network infrastructure, administering lab inventory, and maintaining OH&S compliance. The role offers opportunities to support customer engagements and develop networking skills.

Provide expert network management, troubleshooting, automation, security hardening, capacity planning, performance testing, and infrastructure support. Use Terraform and Python to automate secure network services across multi-datacentre environments. Manage Cisco and firewall infrastructure, analyze network traffic, participate in incident and security response, commission communications systems, and collaborate with cybersecurity teams to remediate vulnerabilities.

The Senior Network Engineer will provision, maintain, secure, test, monitor, and optimize network infrastructure across Cisco, ACI, wireless, SD-WAN, Azure, F5, and firewall environments. Responsibilities include incident and security response, traffic analysis, vulnerability remediation, automation, documentation, infrastructure commissioning, wireless migrations, and project delivery. The role supports network refresh initiatives and collaborates with cybersecurity teams and stakeholders to improve network performance, resilience, and security.

Performs network optimization, capacity planning, traffic analysis, forecasting, and bottleneck identification. Designs, deploys, supports, and troubleshoots IP, WAN, mobile, and fixed network solutions. Develops Python automation scripts, conducts root cause analysis, supports network upgrades and modernization, and collaborates with operations, architecture, and vendors. Requires 6+ years of network engineering experience, telecom exposure, and strong routing and switching fundamentals.

Designs, implements, and optimizes carrier-grade IP/MPLS and SRv6 service provider networks. Provides advanced L3 operational support, troubleshoots complex issues, leads root cause analysis for critical incidents, and supports network transformation and migration programs. Develops network automation using Python, Ansible, YANG, and NETCONF/RESTCONF while managing configuration and continuous operational improvements.

Plan, design, implement, and support enterprise Exchange transformation initiatives, including data center migrations, site consolidations, upgrades, hybrid deployments, tenant migrations, and cloud modernization. Manage mail flow, high availability, Active Directory integration, security, troubleshooting, automation, and reporting. Collaborate with infrastructure, security, cloud, and business stakeholders to execute migrations with minimal disruption and maintain service availability.

Designs, implements, and supports enterprise data center network transformation and migration initiatives. Responsibilities include Cisco data center infrastructure administration, routing and switching, network security and load balancer integration, troubleshooting, infrastructure assessments, technology refreshes, documentation, and stakeholder coordination. The engineer supports large-scale modernization programs while ensuring network availability and performance.

Provides expert network infrastructure management, troubleshooting, security hardening, capacity planning, performance testing, and incident response. Designs and implements network improvements, automation scripts, documentation, and acceptance tests. Supports Cisco, firewall, F5 BIG-IP, ACI, SD-WAN, and Azure environments while collaborating with cybersecurity teams to remediate vulnerabilities. The role includes occasional work at a business resumption site and participation in an on-call roster.

Supports Defence communications and ICT services by delivering infrastructure changes, deployments, remediation, troubleshooting, releases, and service requests. The role maintains operational and configuration data, prepares technical documentation, communicates with stakeholders, and contributes to continuous improvement. It requires network engineering or infrastructure support experience, strong routing and switching skills, and an active NV1 security clearance.

Designs, deploys, and operates resilient data center network fabrics supporting GPU, AI, storage, and high-performance computing infrastructure. Responsibilities include hardware evaluation, BGP and EVPN-VXLAN network design, congestion management, connectivity integration, automation, monitoring, documentation, vendor collaboration, troubleshooting, and technical escalation. The role also develops network architectures, supports deployments, and provides technical guidance to leadership and customers.

Hands-on Network Engineer responsible for designing, deploying, optimizing, and automating enterprise network infrastructure across traditional, cloud, and hybrid environments. The role requires expertise in routing, DNS, DHCP, VPNs, cloud networking, dedicated connectivity, network security, Infrastructure as Code, and highly available multi-region architectures. The engineer will support complex, multi-site environments and use Terraform or CloudFormation to automate network provisioning.

Designs and supports network security infrastructure as a firewall engineer, performs remediation work, and uses DevOps tools including Bitbucket, Jenkins, JIRA, GitHub, Terraform, and Vault. The role requires at least six years of experience.

Build out and expand Cloudflare's global network by provisioning and maintaining datacenter hardware and network devices, performing remote server administration via IPMI/BMC, configuring network equipment, managing contractors, automating tasks with Python/Changie and agentic AI, creating SOPs/runbooks, and coordinating cross-connects and deployments.

Build and design proxy infrastructure from scratch, implement rotation systems, manage IP reputation, optimize for performance, and develop reverse proxy systems for various proxy types.

The role involves supporting infrastructure deployments, managing LAN/WAN environments, optimizing capacity and reliability, and collaborating with teams for network solutions.

Maintain, troubleshoot, and optimize high-performance, low-latency infrastructure supporting global financial exchanges. Responsibilities include tuning RHEL systems, managing highly available routing and multicast networks, implementing security and disaster recovery controls, coordinating maintenance windows and upgrades, and improving automation, configuration management, observability, and operational tooling using Ansible, Zabbix, and Python.

Design, implement, and troubleshoot local and wide-area network solutions (IP/VoIP), lead network projects, create proof-of-concepts, coordinate vendor installs, and support go-live and maintenance. Support monitoring, virtualization (SDN/SD‑WAN), and emerging wireless/5G technologies while communicating requirements to teams and customers.

Support and operate Optiver's APAC network and security infrastructure across offices and data centers. Deploy and manage LAN/WAN, multi-zone firewall architectures, and DC environments using IaC tools. Monitor performance, respond to incidents, collaborate with internal teams and vendors, and drive capacity, reliability, and latency optimizations.

Lead and execute design, migration and build-out of core LAN and switching infrastructure for a data-centre relocation. Plan and raise changes, implement layer 2/3 fibre switching, configure routing protocols, ensure fault tolerance, test and sign off, assist DR client migrations and minimise user impact.

Lead and execute a federal datacentre relocation: design and implement IP/X.25 networks, layer 2/3 fibre and core switching, configure WAN/LAN hardware, manage OSPF/BGP/NAT/VLANs, support VoIP/PABX, create migration plans and test/signoff, and produce technical/operational documentation.

Own customer-facing support for Point One's correction network: troubleshoot complex incidents, lead incident response and RCA, build monitoring/alerting and scalable support processes, surface operational insights, and coach a growing ops/support team.

The Network Engineer will design, implement, and support enterprise networking infrastructure, manage Cisco equipment, FortiGate firewalls, and participate in troubleshooting and optimization tasks across multiple sites.