Australian Citizens residing in Australia only respond. Must have Negative Vetting Level 1 Mandatory Criteria: 1.A minimum of five (5) years demonstrated experience in the design, management and maintenance of internet gateway and/or large-scale data centre networking environment. Weighted Criteria: Demonstrated experience and technical proficiency in the design of services utilising F5/Blue Coat Layer 4-7 switching/load balancing and proxy systems. Demonstrated experience in the design and deployment of network infrastructure including Cisco Data centre technologies like Cisco ACI, Cisco Routers, nexus switches, routing protocols like BGP, OSPF, EIGRP. Demonstrated experience with and/or detailed understanding of Palo Alto firewalls and IPS Solutions. Demonstrated experience in the design and implementation of VPN technologies, email and DNS (Infoblox) Solutions. Demonstrated experience in the design and integration of hybrid and public cloud services. Demonstrated experience in the development and maintenance of system architecture and design documentation. Demonstrated experience with or knowledge of Australian Government information security policies, the ASD Information Security Manual and Essential Eight