Top Network Engineer Jobs in Sydney

Lead global corporate and cloud network architecture and roadmap. Design, deploy and operate secure, highly available hybrid LAN/WAN/Wi‑Fi/VPN across multi‑cloud and multi‑region sites. Own incident response, vendor hardware configuration, international connectivity (including China), infrastructure-as-code automation, documentation, mentoring, and participate in global on‑call rotations.

Hands-on network engineering role combining traditional TCP/IP, BGP/OSPF, DNS/DHCP, VPN expertise with cloud networking (AWS/Azure/GCP), hybrid connectivity (Direct Connect/ExpressRoute), Infrastructure as Code (Terraform/CloudFormation), and network security (NSGs, firewalls, zero-trust, IAM) for large-scale, multi-site enterprise environments.

Manage and secure cloud and on-prem network infrastructure, optimise firewalls and SD-WAN, provide L2/L3 operational support, automate deployments with IaC, collaborate on cloud networking architecture, and participate in a 24x7 on-call roster and incident reviews.

Design, build, automate, and operate secure, scalable cloud networking across AWS (with alignment to GCP and NSX). Develop reusable Terraform modules, drive best practices, collaborate with DevOps and security teams, provide technical leadership and mentorship, own operational support and incident escalation, and maintain architecture and process documentation.

Support and manage ASX core network infrastructure (datacentre, internet, office, service provider), respond to incidents, perform capacity planning and monitoring, assist with network deployments and projects, operate within ITIL processes, design and support F5 and Palo Alto devices, and liaise with stakeholders to deliver mission-critical network solutions.

Support and lead L2/L3 investigations for 5G Cloud Core (UDM/CCxx) incidents, perform fault isolation and service restoration, analyze logs and network flows, collaborate with product/project teams to improve stability, manage provisioning/data operations and upgrades, and drive automation, documentation and knowledge sharing to prevent repeat faults.

Provide L2/L3 support for IMS, 5G Core and Cloud Core: own complex incidents, restore services, perform root-cause analysis, collaborate on releases, drive automation, mentor, and improve live network stability and customer communications.

Deliver complex network projects from design through production across LAN/WAN/SD‑WAN/MPLS/VPN/wireless. Lead discovery, configure routers/switches/firewalls, perform cutovers and post‑migration stabilization, produce designs and plans, engage stakeholders, and improve project delivery processes.

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

Implement and deliver end-to-end network and security solutions for a new trading platform and customer access network. Design and deploy enterprise, data center and cloud networks, configure routing (BGP, OSPF), multicast, MLAG and VLANs, manage firewalls and load balancers, liaise with vendors, and maintain documentation and service delivery.

The Senior Network Engineer will architect and deliver solutions for QRT's network infrastructure, focusing on low latency trading environments. Responsibilities include managing complex networks, collaborating with teams, and staying informed on industry trends.

Monitor, detect and respond to security alerts on edge security platforms; investigate threats, perform incident response and remediation; configure and optimise vendor security services; conduct traffic analysis, log correlation and threat hunting; support vulnerability assessments and post-incident reviews; collaborate with internal teams and vendor partners and maintain operational documentation.

Provide hands-on network engineering support for enterprise and government environments: troubleshoot switching/routing/firewall issues, manage BGP and IPsec VPNs, maintain wireless infrastructure, respond to escalations, implement changes/upgrades, monitor performance, update documentation, and collaborate with internal teams and government clients to ensure secure, compliant solutions.

Lead network operational evolution toward SRE and IaC, automate virtual appliances, resolve major incidents, support hybrid cloud migrations and data centre decommissioning, and collaborate with architecture, security, and infrastructure teams to improve reliability and automation.

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.

Design and implement network solutions, troubleshoot issues, coordinate vendor installations, and manage projects for optimal network infrastructure. Provide customer support and maintain systems for local and wide-area networks.

The Network Engineer Tier 3 is responsible for supporting diverse network infrastructures, troubleshooting complex issues, and providing technical leadership. Tasks include network design, implementation, maintenance, and evaluation of network performance. The role also involves documentation and compliance with standards.

The Network Engineer Tier 2 supports diverse network infrastructures, ensuring compliance and troubleshooting across various networks while integrating new technologies.

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.

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.

Provision, maintain, harden and performance-test network and storage infrastructure. Provide 2nd-line incident and security response, produce designs, automation scripts and documentation, analyse traffic for performance and security improvements, perform acceptance testing and commissioning, support ACI/SDN, F5 and firewall technologies, work with cybersecurity to remediate vulnerabilities, and support infrastructure refresh projects.

Design, implement and deliver end-to-end network and security solutions for ASX's trading platform and ASXNET. Lead routing and multicast deployments, select hardware/software, coordinate with SMEs and vendors, document solutions, and ensure service delivery and customer expectations for mission-critical, large-scale network environments.

Seeking a Senior Network Automation Engineer to enhance and maintain our Perl-based network automation systems, focusing on API development, technical debt reduction, and mentoring junior engineers.

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.