Job description:

Job Description
Role Summary
The AWS L3 SME is responsible for designing, building, automating, and supporting AWS-based network infrastructure to host network appliances and servers. The role works closely with AWS and network teams to define low-level designs, implement infrastructure using Terraform and GitHub pipelines, and enable secure, scalable connectivity between AWS environments and enterprise networks via Transit Gateway (TGW) and Direct Connect (DX) across PNX locations.
Detailed Responsibilities
Design & Architecture
Collaborate with AWS and Network teams to develop Low-Level Designs (LLD) for AWS network infrastructure.
Translate architectural requirements into implementable AWS configurations (VPCs, subnets, routing, TGWs).
Ensure alignment with enterprise network, security, and connectivity standards.
Infrastructure Build & Automation
Provision AWS infrastructure using Terraform (IaC).
Develop and maintain GitHub CI/CD pipelines for automated deployments.
Build and configure:
VPCs, subnets, route tables
Transit Gateways (TGW) and attachments




Security groups and network controls
Ensure reusable, modular, and compliant infrastructure code
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Connectivity Enablement
Establish connectivity between recent VPCs and:
Existing TGWs, or
Newly created TGW architectures
Enable hybrid connectivity to on-prem settings through Direct Connect (DX) across all PNX locations.
Validate routing, traffic flow, and failover behavior.
Deployment Support
Support deployment of network appliances and servers in AWS environments.
Ensure proper network configuration for appliance onboarding (interfaces, routing, security).
Work with network teams/vendors to enable appliance configuration in cloud.
Operations & Troubleshooting Responsibilities
Provide L3-level troubleshooting for:
AWS networking (VPC, TGW, routing issues)
DX connectivity and hybrid routing
Terraform and pipeline deployment failures
Network appliance onboarding and communication issues

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