Sr Network Engineer And Sre

Job Title: Sr. Network Engineer and SRE

Location: Chicago, IL

Work Model: Hybrid

We are seeking a highly skilled Senior Network Engineer to lead the design, automation, and modernization of enterprise network infrastructure across hybrid environments. This role is responsible for building highly resilient, secure, software-defined network architectures spanning on-premises data centers, private cloud, and public cloud platforms.

The ideal candidate possesses deep expertise in network engineering, Infrastructure as Code (Terraform), scripting, network isolation, micro-segmentation, and cloud networking. This individual will partner closely with Cloud Engineering, Cybersecurity, Infrastructure, SRE, and Application teams to deliver secure, scalable, and automated networking solutions aligned with Zero Trust principles.

Enterprise Network Engineering

• Design, implement, and support highly available enterprise network infrastructure across:

  • On-premises data centers

  • Private cloud platforms

  • AWS

  • Microsoft Azure

• Engineer resilient Layer 2/Layer 3 network architectures including:

  • Routing

  • Switching

  • BGP

  • OSPF

  • VXLAN/EVPN

  • SDN technologies

• Design network architectures supporting critical enterprise resiliency and disaster recovery.

Infrastructure Automation

• Build Infrastructure as Code (IaC) solutions using Terraform.

• Develop reusable Terraform modules and standardized deployment patterns.

• Automate network provisioning and configuration management.

• Integrate automation into Git-based CI/CD pipelines.

• Eliminate manual networking activities through automation-first engineering.

Scripting & Automation

• Develop automation using:

  • Python

  • PowerShell

  • Bash

  • REST APIs

• Automate:

  • Network provisioning

  • Configuration validation

  • Compliance verification

  • Drift detection

  • Operational reporting

  • Health monitoring

Network Isolation & Segmentation

• Lead enterprise initiatives involving:

  • Network isolation strategies

  • Secure enclave design

  • Air-gapped environments

  • Isolated Recovery Environments (IRE)

  • Secure management networks

  • Recovery network architectures

• Design secure separation between:

  • Production

  • Non-production

  • Recovery environments

  • Cyber Recovery environments

  • Management networks

Micro-Segmentation

• Design and implement enterprise micro-segmentation utilizing technologies such as:

  • VMware NSX

  • Illumio

  • Cisco Secure Workload (formerly Tetration)

  • Cloud-native security groups

  • Azure Network Security Groups

  • AWS Security Groups

  • Network ACLs

• Responsibilities include:

  • East-West traffic control

  • Zero Trust network architectures

  • Least-privilege network access

  • Dynamic policy enforcement

  • Application dependency mapping

Cloud Networking

• Engineer networking solutions across:

  • AWS: VPCs, Transit Gateway, Direct Connect, Route Tables, PrivateLink, Network Firewall

  • Azure: VNets, ExpressRoute, Virtual WAN, Azure Firewall, NSGs, Application Gateway, Azure Load Balancer

Security Engineering

• Collaborate with Cyber Security to implement:

  • Zero Trust networking

  • Network Access Control

  • Secure remote connectivity

  • Firewall architecture

  • IDS/IPS

  • DDoS protection

  • Secure DNS

  • Certificate management

  • Encryption in transit

Resiliency Engineering

• Design networking solutions supporting:

  • High Availability

  • Disaster Recovery

  • Active-Active architectures

  • Active-Passive architectures

  • Multi-region cloud deployments

  • Automated failover

  • Resilient routing

  • Critical application recovery

Monitoring & Observability

• Implement enterprise network observability using tools such as:

  • ThousandEyes

  • SolarWinds

  • Dynatrace

  • Splunk

  • Grafana

  • Prometheus

  • Cloud-native monitoring solutions

• Develop dashboards, KPIs, and automated alerting for proactive network operations.

• Bachelor's degree in Computer Science, Information Technology, Engineering, or equivalent experience.

• 8+ years of enterprise network engineering experience.

• 5+ years supporting hybrid cloud networking.

• 3+ years of Terraform Infrastructure as Code experience.

• Strong experience with Python, PowerShell, or Bash scripting.

• Extensive experience with enterprise routing and switching.

• Experience implementing software-defined networking (SDN).

• Hands-on experience designing network isolation and secure segmented environments.

• Experience implementing micro-segmentation in enterprise environments.

• Strong understanding of Zero Trust networking principles.

• Experience supporting mission-critical enterprise platforms.

• Experience in large financial institutions or other highly regulated industries.

• Experience supporting hybrid multi-cloud environments.

• Knowledge of Kubernetes/OpenShift networking.

• Experience with VMware NSX or Cisco ACI.

• Familiarity with GitHub, GitLab, or Azure DevOps pipelines.

• Experience with disaster recovery and cyber recovery networking.

• Knowledge of Infrastructure as Code governance and policy-as-code.

• Experience with immutable infrastructure and resilient network architectures.

• CCNP Enterprise or CCIE

• AWS Advanced Networking Specialty

• Microsoft Azure Network Engineer Associate (AZ-700)

• HashiCorp Terraform Associate

• VMware VCP-NV (NSX)

• Palo Alto PCNSE

• CISSP (preferred)

• Enterprise network architecture

• Hybrid cloud networking

• Infrastructure as Code (Terraform)

• Python, PowerShell, and Bash scripting

• Network automation

• Zero Trust architecture

• Network isolation

• Micro-segmentation

• Cloud networking (AWS & Azure)

• SDN technologies

• Enterprise resiliency

• Disaster Recovery networking

• Cyber Recovery networking

• Infrastructure security

• CI/CD integration

• Cross-functional leadership

• Excellent communication and executive presentation skills