Location:

Sydney, Australia About the Company

A rapidly growing technology organisation is building next-generation

AI infrastructure and cloud platforms

across APAC and is looking for a

Principal Network Architect

to lead the design and evolution of its national and international backbone network. This is a highly strategic technical role focused on building a

scalable, resilient and vendor-neutral connectivity architecture

across terrestrial fibre, subsea networks, optical transport, IP backbone and data-centre interconnection. You will work closely with carriers, fibre providers, subsea operators, data centres, technology vendors and internal engineering teams, acting as a key technical authority for backbone architecture and connectivity strategy. Key Responsibilities

Own the architecture and technical direction of the

national and international backbone network . Design and evolve terrestrial fibre, subsea, optical and IP backbone infrastructure. Define network standards, reference architectures and reusable design patterns. Ensure high levels of

resilience, route diversity and SRLG protection .



Lead technical evaluation and selection of carriers, subsea providers and network vendors. Develop technical requirements, RFPs and vendor evaluation criteria. Provide technical assurance across design, delivery, migration and operational readiness. Lead complex network changes, migrations and cutovers. Work closely with Network Engineering, Data Centre and Operations teams. Mentor senior engineers and contribute to long-term connectivity strategy. 10+ years' experience

designing and operating large-scale backbone networks. Principal/Lead Architect or Distinguished Engineer-level experience. Background within a

carrier, hyperscaler, cloud, data-centre or AI infrastructure

setting. DWDM / OTN / coherent optics 100G / 400G / 800G IP/MPLS & Segment Routing EVPN & traffic engineering SRLG and network resilience Experience working with carriers, fibre providers, subsea operators and major network vendors. Solid architecture, technical assurance and stakeholder management skills.
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📌 Principal Network Architect Haymarket
🏢 Hamilton Barnes
📍 Haymarket