AusNet Electricity Services owns and operates the physical infrastructure that keeps the lights on across Victoria - electricity transmission lines, distribution networks, and gas pipelines serving the outer northern and eastern suburbs of Melbourne and eastern Victoria. The asset base runs to approximately $11 billion, which means the attack surface isn't abstract: it's substations, SCADA systems, and operational technology that directly controls energy flows to millions of people. The threat model here is industrial control system compromise, supply chain infiltration, and the expanding digital footprint that comes with grid modernization and clean energy integration.
This is critical infrastructure security at scale. The technical domains span energy transmission, distribution, gas networks, and the clean energy transition - each carrying distinct OT and IT convergence challenges. Defending a diversified energy network means working across legacy operational technology stacks, grid-edge devices, and the enterprise IT layer that ties it all together. The perimeter isn't a firewall; it's hundreds of kilometers of connected infrastructure.
AusNet operates exclusively in Victoria, Australia, and is the state's largest diversified energy network business. The company's stated priorities center on reliable service and accelerating a sustainable future, which in practice means the security team has to protect both aging infrastructure and the new digital systems being layered on top of it as the grid evolves. If you're looking for a role where the threat model has physical consequences and the scope is genuinely complex, this is one of the higher-stakes environments in Australian critical infrastructure.
