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
- Solid 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 new 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.

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📌 Senior Network Engineer (AI Infrastructure) (Sydney)
🏢 Capital Executive Search
📍 Sydney