Capital Executive Search is exclusively partnering with IREN
to appoint a Senior Network Engineer into its Australian Deployment Team. IREN is an Australian-founded, NASDAQ-listed infrastructure company headquartered in Sydney, building and operating next-generation data centres designed for high-performance computing and AI.
IREN is rapidly expanding its AI Cloud infrastructure, deploying large-scale GPU environments and the networking architecture required to support some of the world's most demanding AI workloads. The company owns and operates its data centre infrastructure, with a focus on renewable energy and power-dense computing.
This is an opportunity to join the team responsible for bringing new AI data centre capacity online, working across high-performance networking, GPU fabrics, automation and large-scale deployment.
The Role:
As a Senior Network Engineer, you will design, deploy, automate and optimise the network infrastructure supporting IREN's AI/HPC environments.
You will:
Design and deploy high-performance data centre networks across GPU compute, storage, front-end and management environments
Design and implement CLOS / ECMP data centre fabrics
Work across Layer 2/3 technologies including VLANs, VXLAN, BGP EVPN, OSPF and IS-IS
Lead network workstreams through data centre construction, energisation and deployment
Work closely with construction, electrical, data centre operations and engineering teams on rack layouts, cabling and deployment timelines
Provision, configure and validate network infrastructure at scale




Develop standardised network designs, bills of materials and deployment runbooks
Build automation for zero-touch provisioning, configuration generation and deployment validation
Support RDMA / RoCEv2 and/or InfiniBand environments, including PFC, ECN and lossless fabric tuning
Own network acceptance testing and GPU cluster bring-up
Troubleshoot complex deployment issues and hand fully validated environments into operations
Desired Qualifications:
Proven experience designing and deploying large-scale or complex data centre networks
Deep expertise in Layer 2/3 networking and data centre fabric architecture
Strong knowledge of CLOS, ECMP, VXLAN and BGP EVPN
Experience with Arista, Cisco, Dell, NVIDIA Spectrum-X and/or Fortinet
Experience with Cumulus Linux, SONiC, NX-OS or EOS
Strong firewall and network security experience, ideally Fortinet / VDOM
Experience supporting AI/HPC, RDMA, RoCEv2 or InfiniBand environments is highly desirable
Automation experience with Python, Ansible, Terraform and Git/GitLab
Why IREN?
This is not a traditional enterprise networking role. You'll be working directly on the infrastructure behind large-scale AI and GPU compute, with the opportunity to influence how current data centre environments are designed, deployed and brought into production. IREN is building at significant scale, combining data centre infrastructure, renewable energy and high-performance computing to support the next generation of AI workloads.

📌 Senior Network Engineer (Ai Infrastructure) (New South Wales)
🏢 Capital Executive Search
📍 New South Wales