F5 Security/Network Security Architect

Zone IT Solutions; Sydney; On-site; AUD 180,000 - 240,000; Full time

Job summary

Zone IT Solutions Pty Ltd is seeking a F5 Security/Network Security Architect with 7+ years of hands-on experience in designing, implementing, and managing complex network and security infrastructures across APAC. Deep expertise in F5 BIG-IP platforms, modules, DNS, and application security is essential.

You will lead end-to-end delivery, architect high-availability solutions, and drive automation using AS3/iRules and Terraform.

Qualifications

• 7+ years in network infrastructure, security architecture or application delivery.
• Proven experience delivering F5 professional services to enterprise/ISP clients.
• Experience with large-scale migrations, including DNS migrations, CGNAT deployments and WAF rollouts.
• APAC regional project implementation experience is highly desirable.

Responsibilities

• Lead end-to-end design, implementation and delivery of F5-based solutions.
• Architect DNS solutions, including caching resolvers and authoritative servers.
• Design DNS and application security controls to protect against DDoS and WAF threats.
• Prepare and maintain high/low level design docs and runbooks.
• Collaborate with network, infrastructure, platform and security teams.
• Drive high availability and failover architecture for zero-downtime resilience.
• Provide troubleshooting, optimization and post-implementation support.
• Define professional services scoping and engage with customers.
• Champion automation using Terraform, AS3 and iRules.
• Implement security hardening, RBAC, logging and compliance across F5 platforms.

Skills

F5 BIG-IP

LTM

DNS/GTM

ASM

AFM

CGNAT

Routing & Switching

IPSec VPN

Packet Capture

Grafana

Prometheus

VMware

AWS

Azure

TACACS+

RADIUS

Kafka

Kubernetes

Tools

AS3

iRules

Job description

F5 Security/Network Security Architect with deep expertise in F5 technologies, enterprise network security, and application delivery. The ideal candidate brings 7+ years of hands on experience designing, implementing, and managing complex network and security infrastructures, ideally within ISP, enterprise, or professional services environments across the APAC region.

Key Skills & Technical Expertise

• F5 BIG-IP platforms: iSeries, rSeries, Velos, Viprion (hardware & virtualised).
• F5 Modules: LTM, DNS/GTM, ASM (AWAF), SSLO, CGNAT, AFM (DDoS), PEM, BIG-IQ CM.
• Enterprise routing and switching: OSPF, BGP, STP, VLAN, LACP.
• IPSec VPN design and implementation.
• Packet capture and analysis: tcpdump, Wireshark.
• Automation & Infrastructure as Code: Terraform, AS3, iRules.
• Authentication services: TACACS+, RADIUS.
• Monitoring & observability: SNMP, Syslog, Grafana, Prometheus.
• Virtualisation: VMware and related technologies.
• Cloud platforms: AWS and Microsoft Azure.

Key Responsibilities

• Lead end-to-end design, implementation and delivery of F5-based network and security solutions.
• Architect DNS solutions, including caching resolvers, validating resolvers and authoritative DNS servers.
• Design DNS and application security controls to protect against DDoS attacks, WAF threats and DNS-based exploits.
• Prepare and maintain HLD, LLD, security design documents, operational runbooks and SOPs.
• Collaborate with network, infrastructure, platform and security teams.
• Drive high availability and failover architecture to ensure zero-downtime resilience.
• Provide troubleshooting, optimization and post-implementation support.
• Define professional services scoping requirements and engage directly with customers.
• Champion automation using Terraform, AS3/iRules and related tools.
• Implement security hardening, RBAC, secure logging and compliance controls across F5 platforms.

Experience Requirements

• 7+ years in network infrastructure, security architecture or application delivery.
• Proven experience delivering F5 professional services to enterprise and/or ISP clients.
• Experience with large-scale migrations, including DNS migrations, CGNAT deployments and WAF rollouts.
• APAC regional project implementation experience is highly desirable.

We specialize in Digital, ERP, and larger IT Services. We offer flexible, efficient and collaborative solutions to any organization that requires IT, experts. Our agile, agnostic, and flexible solutions will help you source the IT Expertise you need.

Zone IT Solutions is an equal opportunity employer and our recruitment process focuses on essential skills and abilities. We encourage applications from a diverse array of backgrounds, including individuals of various ethnicities, cultures, and linguistic backgrounds, as well as those with disabilities.