Infrastructure Engineer - Network & Security Focus (12-Month Contract)

Location: Sydney
Contract: 12 Months, Full-Time

A global organisation in the professional services sector is seeking an experienced Infrastructure Engineer to lead a comprehensive review and modernisation of its network and security environment. You'll join a highly skilled infrastructure team supporting a multi-site operation of approximately 750 users across Australia.

This is a hands-on, project-driven role with a focus on auditing, optimising, and strengthening network infrastructure - ideal for someone with deep technical knowledge and a strategic mindset around security, performance, and operational resilience.

What You'll Be Doing

• Assess and document the current network landscape - hardware, topology, connectivity, and security configurations.
• Lead efforts to improve performance, security, and scalability, identifying and resolving bottlenecks and gaps.
• Overhaul and optimise firewall rules, VPNs, access policies, and segmentation strategies.
• Enhance monitoring and alerting systems to improve visibility across environments and reduce incident response times.
• Contribute to hybrid cloud initiatives, particularly around Azure networking.
• Work closely with both internal stakeholders and external vendors to ensure system resilience and compliance.
• Deliver detailed documentation, architecture diagrams, and knowledge-sharing sessions to upskill the internal team.

Core Technologies in Use

You'll work across a modern, enterprise-grade toolset including:

• Networking: Cisco switches, Silver Peak routers, Meraki wireless, load balancers
• Firewalls & Security: Palo Alto firewalls, Cisco ISE, VLAN segmentation, ACLs
• Remote Access: Palo Alto GlobalProtect, Azure VPN Gateway
• Cloud & Hybrid: Azure VNets, NSGs, ExpressRoute, Azure Firewall, Application Gateway with WAF
• Monitoring: SolarWinds, Wireshark
• Access & Identity: Azure AD, RADIUS, TACACS+, Microsoft Entra MFA
• Documentation: Visio, Confluence, SharePoint

Success in This Role Looks Like:

• Clear, accurate documentation of all network infrastructure and configurations
• Noticeable reduction in latency, packet loss, and redundant firewall rules
• Improved security posture through segmented network design and zero-trust principles
• Real-time dashboards for network health and performance visibility
• Smooth knowledge handover with documented SOPs and training materials
• Milestone delivery on project audit, optimisation planning, and implementation within contract period

About You

• Proven experience in enterprise networking, security infrastructure, and cloud networking (especially Azure)
• Strong technical audit and documentation skills
• Excellent troubleshooting and problem-solving capabilities
• Comfortable working independently and owning technical outcomes
• Previous experience in regulated or professional services environments a plus