Senior AWS Network & Firewall Engineer (L3)
First seen by Alion on Nov 4, 2026.
Job Description
We are seeking an experienced Network & Firewall Engineer to design, administer and troubleshoot AWS networking infrastructure, firewall services and enterprise network security solutions.
Key Responsibilities
Design and manage AWS VPCs, subnets, routing and Transit Gateway (TGW).
Configure and troubleshoot VPN connectivity and network routing.
Manage AWS Security Groups and Network ACLs (NACLs).
Administer and troubleshoot AWS Network Firewall, WAF and Palo Alto firewalls.
Support ALB, NLB and GWLB services.
Manage Route 53 and troubleshoot DNS resolution issues.
Support and troubleshoot Squid proxy services.
Perform advanced L3 network and firewall troubleshooting.
Review firewall policies, security rules and network configurations.
Lead root cause analysis for complex network incidents.
Implement network optimisation and approved security changes.
Requirements
Minimum 6 years of overall relevant experience.
Minimum 5 years in Network & Security, including AWS networking and firewall technologies.
Strong hands-on experience with VPC, subnets, routing, TGW and VPN.
Experience with AWS Network Firewall, WAF, Security Groups and NACLs.
Experience with Palo Alto firewalls and Squid proxy.
Knowledge of ALB, NLB, GWLB and Route 53.
Strong L3 network troubleshooting and security policy management experience.
Bachelor's degree in IT, Computer Science or equivalent qualification.
AWS Certified Advanced Networking – Specialty certification required.
Skills
Squid, Certifications, Subnetting, Security Group, Information Technology, DNS Management, Computer Science, Network Troubleshooting, VPN Network, IP Routing, Amazon EC2, Network Administration and Maintenance, Windows Firewall, VPN, Amazon VPC, Firewall Management