Top Network Engineer Jobs in Sydney

Provides network infrastructure management, troubleshooting, security hardening, capacity planning, performance testing, incident response, and optimization. The role supports Cisco networking, firewalls, software-defined networking, cloud technologies, automation, and cybersecurity improvements. Responsibilities include network traffic analysis, systems commissioning, technical documentation, scripting, vulnerability remediation, and collaboration with cyber security teams. Occasional scheduled work is required at the Bella Vista business resumption site.

Designs, configures, maintains, and troubleshoots complex LAN, WAN, wireless, cloud, and multi-site network environments. Supports Cisco security devices, F5 load balancers, VPNs, routers, switches, firewalls, and network virtualization technologies. Maintains documentation, monitoring, ticketing, change management, service levels, and assigned projects while participating in a 24/7 on-call roster.

Designs, implements, maintains, and optimizes enterprise voice, data, security, WAN, and SD-WAN infrastructure. Provides Level 3 technical support, manages telecommunications carriers and vendors, monitors service performance, maintains documentation and security, supports incidents and on-call escalation, and leads network infrastructure projects and improvements.

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.

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.

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.

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.

Deliver complex network projects from design through production deployment across LAN, WAN, SD-WAN, MPLS, VPN, and wireless environments. Conduct client discovery, document infrastructure, identify risks, develop migration plans, configure multi-vendor networking and security equipment, and lead post-migration stabilization. Collaborate with clients, vendors, and internal teams while presenting designs, plans, and recommendations. Troubleshoot complex network issues and contribute to continuous improvement in project delivery and documentation.

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.

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.

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

The Senior Software Engineer will design and implement automation for complex network workflows, collaborate with telco teams, and employ AI-assisted tools for efficient solutions.

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.

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.

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.

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.

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.