Senior Infrastructure Engineer

4 weeks ago

Sydney, New South Wales, Australia Ambition Group Full time

Senior Infrastructure Engineer - Network & Core Services
Sydney based / Permanent role

I'm partnering with a long-standing client to hire a Senior Infrastructure Engineer to modernise and secure their core tech environment. This is a hands-on role, perfect for someone who still enjoys being in the detail, thrives on designing and securing infrastructure, and brings deep knowledge across on-premise, cloud and network platforms.

Why this role?

  • Lead the design, maintenance and security of infrastructure for a medium enterprise with a national footprint
  • Partner with operations, and project delivery teams to drive modernisation and uplift capability
  • Shape foundational architecture across AD, DNS, DHCP, PKI, firewalls, and hybrid identity
  • Supportive team culture with ongoing transformation and investment in technology

Responsibilities include:

  • Designing and maintaining the organisation's core infrastructure services with a strong security lens
  • Driving improvements across identity and access, secure network architecture and system configurations
  • Leading the technical delivery of infrastructure projects (migrations, upgrades, integration)
  • Acting as a senior escalation point and SME across Windows Server, networking, backup/DR, and authentication
  • Contributing to the documentation, life cycle management, and disaster recovery planning
  • Supporting the adoption of zero-trust principles and secure connectivity across sites and platforms

What we're looking for:

  • 6+ years' experience as an Infrastructure Engineer including 3 years in a senior/architectural role
  • Experienced with Microsoft technologies such as AD, GPO, DNS, DHCP, Azure AD
  • Strong understanding of authentication protocols
  • Experienced with a secure network environment such as VPNs, VLANs, firewalls, routing, switching
  • Good understanding of disaster recovery, backup processes, and ensuring systems stay online across on-prem and cloud environments.
  • Familiarity with security frameworks such as Essential Eight or CIS Benchmarks

If you're someone who enjoys being hands-on and delivering outcomes with strategic improvement, I'd love to hear from you

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