Top Senior Network Engineer Jobs in Chicago, IL

Lead the design, implementation, and operation of enterprise network security infrastructure across data centers, cloud environments, offices, retail locations, and distribution centers. Manage Palo Alto, Fortinet, and Zscaler platforms; implement zero trust, segmentation, secure connectivity, and compliance controls; coordinate incident response; automate security operations; support audits; and provide architectural guidance. The role also oversees device lifecycle management, documentation, service-provider escalations, and continuous improvement of network security capabilities.

Leads the design, implementation, and operation of enterprise network security platforms across data centers, cloud environments, retail locations, offices, and distribution centers. Responsibilities include Palo Alto and Fortinet firewall management, Zscaler administration, zero trust architecture, segmentation, compliance controls, incident response, automation, documentation, device lifecycle management, and security architecture strategy.

Design, implement, and support low-latency, high-availability network infrastructure for real-time trading. Own projects across data centers, troubleshoot complex network and latency issues, perform maintenance and upgrades, monitor capacity, document systems, and participate in on-call rotation while collaborating with software engineers and traders.

Design, implement, and support a high-performance networking environment while collaborating with traders and developers to enhance network operations.

Design, deploy, and operate multi-vendor, multi-region hybrid cloud data center networks. Drive automation-first deployments using IaC and scripting, improve deployment quality/velocity, integrate automation into capacity workflows, build visibility/tools, maintain production reliability, and participate in 24x7 on-call rotations.

Lead strategy and execution for scalable compute and edge network infrastructure spanning on-premise and cloud. Automate distributed connectivity, drive software-first solutions for service routing and traffic engineering, ensure performance and operability, decompose complex problems, produce reusable artifacts, and mentor engineering teams.

Lead and grow multiple product-focused software engineering teams building cloud-native, ultra-low-latency, highly resilient payment systems. Drive architecture, microservices decomposition, AWS deployments, engineering practices, cross-team collaboration, mentorship, and adoption of cutting-edge AI tooling to accelerate development and improve system availability and scalability.

Lead technical vision and architecture for a cloud-native, low-latency global payments platform. Decompose complex systems, ensure performance/scalability/operability, drive reusable solutions, mentor engineers, evangelize best practices, and apply advanced AI tooling to accelerate development.

Lead and mentor a team building high-throughput, resilient distributed microservices and full-stack cloud solutions for global payment processing. Collaborate with product managers, design scalable systems, ensure observability and reliability, and occasionally code, evaluate, and modernize platforms using cloud, container orchestration, and multiple programming languages.

Lead a team delivering cloud-based, full-stack, microservices solutions for payment network and regulatory needs. Mentor engineers, drive technical direction, collaborate with product, and occasionally write or evaluate code. Leverage containers, cloud services, databases, and modern languages to build scalable systems.

As a Network Engineer, you will resolve network issues, improve operations through automation, mentor juniors, and interact with clients.

Design and evolve ultra-low-latency global networks across data centers, colocation, and cloud. Lead routing, scalability, lab validation, automation (Python), observability, and high-complexity migrations while mentoring engineers and producing regulatory and operational documentation.

Lead software engineers will manage diverse tech projects, provide mentorship, and deliver robust cloud solutions to meet regulatory needs.

Administer and troubleshoot IBM z/OS Communications Server environments (VTAM, TCP/IP, TN3270); support GDPS disaster recovery networks; manage TPX Session Manager and Connect:Direct; implement secure file transfer (FTP/SFTP/FTPS/FTP-AT/TLS); perform SMP/E software installs and upgrades; monitor and resolve complex mainframe networking issues; participate in on-call rotation and develop operational procedures and best practices.

Lead architecture and implementation of high-throughput, low-latency global payment systems in the cloud. Drive technical vision, mentor engineers, evangelize AI-native patterns, remove technical debt, and partner with executives to deliver resilient, secure, and scalable payments infrastructure.

Lead technical vision and hands-on engineering for Capital One's Global Payment Network. Design and deliver high-throughput, low-latency distributed systems on public cloud, apply AI tooling, drive reliability, performance, and mentor engineering talent across the organization.

The Senior Lead Network Engineer will enhance and maintain large-scale network infrastructure, advise on hardware and software, conduct testing, and provide training.

The Network Engineer will design, implement, and support complex network environments while ensuring cybersecurity and automation of network operations. Responsibilities include maintaining enterprise LANs, WANs, and cloud networks, while also handling vulnerability remediation and operational documentation.

Designs and implements complex enterprise network solutions, supports customer pilots and sales, provides Tier IV escalation support, troubleshoots network issues, develops capacity models, evaluates hardware and software, maintains technical documentation and procedures, and conducts security audits. Leads and mentors network engineers, presents technical information, participates in an on-call rotation, and supports customer professional services projects. The role requires independent judgment, occasional travel, and variable night or weekend work.

Design, deploy, automate, and support large-scale cloud network infrastructure across AWS, Azure, and GCP. Manage firewalls, Kubernetes networking, VPNs, DNS, BGP, monitoring, infrastructure as code, and network performance. Lead technical roadmaps, design reviews, troubleshooting, engineer onboarding, and team direction while participating in on-call support and occasional travel.

Design, deploy, and operate enterprise network infrastructure across data centers and cloud (GCP, AWS, Azure). Manage VPCs, VPNs, BGP, F5 BIG-IP, hybrid connectivity, and observability. Build IaC and automation with Terraform, GitLab CI/CD, and Ansible. Maintain monitoring, documentation, and participate in on-call support for critical incidents.

Design, deploy, and troubleshoot complex multi-vendor network topologies using BGP, OSPF, and MPLS. Implement MPLS-based Layer 2/3 VPNs, optimize routing and failover, configure WAN edge, peering, and route reflectors, and perform packet analysis and traffic shaping for high-performance backbone infrastructure.

Design, configure, operate, and troubleshoot multi-vendor IP networks. Implement and maintain MPLS/IP services, routing (OSPF/BGP), LAN technologies, QoS, IPSec VPNs, and firewalls. Lead migrations, upgrades, audits, documentation, and collaborate with operations and project teams to ensure performance and minimal downtime.

Provision, activate, validate and troubleshoot DWDM/SONET/OTN services across multi-vendor optical transport platforms. Use TL1/CLI and NMS tools for topology, performance and fault management. Perform audits, tracing, upgrades, migrations and cutovers, maintain circuit/configuration documentation, and collaborate with teams during maintenance and deployments.

Design, implement, and maintain global network infrastructure including switching, routing, wireless, VPNs, firewalls, and cloud networking. Troubleshoot performance, enforce security policies, document configurations, collaborate with peers and vendors, provide on-call support, and travel to sites as needed.