Senior Infrastructure Engineer

Profectus is seeking an experienced Senior Infrastructure Engineer with F5 expertise to support enterprise application delivery services within an Australian Government agency. You will engineer, maintain and support F5 BIG-IP platforms that provide load balancing, traffic management and secure access for high availability services. The work covers platform administration, complex troubleshooting, upgrades and hardware refresh, and vulnerability remediation.

Key Responsibilities

• Administer and engineer F5 BIG-IP platforms, including LTM, DNS/GTM and APM
• Design and maintain F5 configurations, including virtual servers, pools, monitors, SSL/TLS profiles, iRules and certificates
• Troubleshoot complex application delivery and network performance issues across multiple technology layers
• Perform packet captures, traffic flow analysis, log analysis and root cause investigation
• Plan and deliver F5 software upgrades, firmware maintenance and vulnerability remediation
• Support hardware lifecycle activities, including refresh planning, licensing, commissioning and handover
• Implement changes during planned maintenance windows, including testing, validation and rollback planning
• Contribute to data centre network design, resilience and disaster recovery planning
• Work with vendors, managed service providers and internal technical teams to deliver operational and project outcomes
• Develop and maintain technical standards, documentation and operational procedures
• Mentor and transfer knowledge to internal staff

Required Experience

• Expert-level experience administering and troubleshooting F5 BIG-IP platforms in large government or enterprise environments
• Hands-on experience with F5 LTM, DNS/GTM and APM, including high availability clusters
• Strong knowledge of load balancing, SSL/TLS, authentication and traffic management
• Advanced UNIX/Linux command-line skills for diagnostics, packet capture and log analysis
• Strong knowledge of TCP/IP, routing, switching, VLANs, firewall integration and segmentation in data centre networks
• Experience leading platform upgrades, hardware refresh and vulnerability remediation, including testing and rollback planning
• Experience working within change management processes for critical infrastructure
• Strong documentation skills and the ability to explain technical issues to technical and non-technical audiences

Desirable Experience

• F5 certifications, such as F5-CA, F5-CTS or F5-CSE
• Cisco CCNP Enterprise, CCNP Data Centre or equivalent
• Experience with Cisco ACI, Nexus switching and integration with load balancing platforms
• Automation and scripting experience using Python, Ansible, Terraform or similar
• Red Hat or Linux administration certifications
• Security certifications such as Security+, CISSP or CISM
• Experience supporting Australian Government or regulated industry environments

Security Clearance Requirements

• Must be an Australian Citizen
• Must have a current AGSVA Baseline Security Clearance (minimum)
• Current AGSVA NV1 Security Clearance (or higher) is preferred

Working Arrangements

• Hybrid
• Canberra

Why Profectus

Profectus partners with Australian Government agencies to deliver trusted ICT capability across complex delivery programs. We take a long term, relationship driven approach, supporting our people across the full lifecycle of their engagement while contributing to outcomes of national importance.