Job Description

Head of IT & Infrastructure | Sydneyn

Take complete ownership of IT and infrastructure for a quick-growing technology business.

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We're partnering with a rapidly scaling technology company where software, hardware and advanced engineering come together.

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This is an opportunity for a hands-on infrastructure leader to take full ownership of the systems keeping the entire operation running, from complex networking, cloud and security through to the specialist infrastructure supporting engineering and production.

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The business is growing quickly and needs someone who can bring structure, improve reliability and build an infrastructure environment capable of supporting that growth.

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You'll have the autonomy to make technical decisions, shape the long-term infrastructure roadmap and build out the IT function as the business expands.

What You'll Be Working Onn

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Networking: Own the design and operation of the network environment, including switching, routing, VLANs, firewalls, VPNs and network segmentation.

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Infrastructure: Manage Linux and Windows environments, servers, virtualisation, storage, backups and disaster recovery.

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Cloud: Support and improve AWS, DigitalOcean and on-premise infrastructure, with a focus on reliability, security and automation.

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Identity & Endpoints: Manage Microsoft Entra ID, Active Directory, SSO, MFA, device management and access controls.

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Security: Implement practical security controls, improve infrastructure security and support compliance requirements.

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Engineering Systems: Maintain the infrastructure supporting technical teams, including compute resources, CI environments, storage and specialist equipment.

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Strategy & Ownership: Take responsibility for infrastructure planning, vendors, budgets, documentation and scaling the IT function.

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What We're Looking Forn

We're looking for someone with broad technical capability who has experience taking ownership of infrastructure across a business, rather than specialising in just one area.





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The key things we're looking for:

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Excellent networking fundamentals, including hands‑on experience configuring switches, routing, firewalls, VLANs and troubleshooting network issues.

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Broad systems administration experience across Linux, Windows, virtualisation and storage.

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Strong Microsoft identity experience, including Entra ID, Active Directory and hybrid environments.

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Experience managing cloud infrastructure, ideally AWS, alongside on‑premise systems.

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Scripting and infrastructure automation experience.

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Good security fundamentals across identity, access, endpoints and infrastructure.

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Experience working in a growing business where you've built, improved or taken ownership of systems yourself.

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The ability to move between hands‑on technical work, problem‑solving and longer‑term infrastructure planning.

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Experience supporting engineering teams, specialist technical environments or complex on‑premise infrastructure would be particularly valuable.

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Kubernetes, manufacturing systems and formal security compliance experience would also be useful, but aren't essential.

Why Consider This Opportunity?n

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Genuine ownership: Take responsibility for how the entire IT and infrastructure environment operates and evolves.

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Build and improve: Design new solutions, modernise existing systems and introduce better ways of working.

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Technical variety: Work across networking, cloud, infrastructure, security and specialist systems rather than being limited to one technology.

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Autonomy: Make decisions, solve problems and shape the future infrastructure environment.

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Growth: Join a scaling business with the opportunity to build and lead a team as the company expands.

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Equity: Competitive base salary plus company equity.

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Location: Sydney

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If you're currently an Infrastructure Lead, IT Infrastructure Manager, Head of Infrastructure or Senior Infrastructure Engineer looking for greater ownership, we'd be keen to speak.

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📌 Head of IT Infrastructure (Sydney)
🏢 The Onset Group
📍 Sydney