Network Engineer (Data Center)

HireOn Tech; St. Louis (MO); On-site; USD 90,000 - 120,000; Full time

Job summary

HireOn Tech is seeking a Network Engineer 3 to lead enterprise data-center networking initiatives in a fast-paced environment. The role focuses on Arista switching (EOS) and migrating from Cisco ACI, with tight integration to security tools like Palo Alto Panorama, F5 BIG-IP and Imperva WAF.

You will implement, validate, and maintain complex network infrastructure, coordinate across security, DNS/IPAM, and monitoring teams, and contribute to automation using Python, Ansible, Git and Terraform.

Qualifications

• Extensive experience in enterprise data-center networking.
• Ability to implement, troubleshoot, and support complex network infra.
• Experience with Cisco ACI-to-Arista migrations.
• Security integrations with Palo Alto Panorama, F5 BIG-IP and related tools.

Responsibilities

• Plan, implement, validate, maintain, and rollback network changes.
• Deploy, configure, and troubleshoot Arista switching with EOS and CloudVision.
• Support Cisco ACI-to-Arista migrations and related activities.
• Coordinate with Palo Alto, F5, Imperva, Infoblox and FireMon for integrated ops.
• Automate repeatable tasks using Python, Ansible, Git, REST APIs, Terraform.
• Manage changes via ServiceNow and support after-hours maintenance.

Skills

Layer 2 & 3 fundamentals

VLANs

VRFs

MLAG

BGP

OSPF

High availability

Tools

Arista EOS

CloudVision

Palo Alto Panorama

F5 BIG-IP

Imperva WAF

Infoblox DNS/DHCP/IPAM

FireMon

Terraform

Ansible

Git

REST APIs

Job description

• Demonstrated professional experience in enterprise network engineering within data-center environments, with the ability to independently implement, troubleshoot, and support complex network infrastructure.
• Strong Layer 2 and Layer 3 fundamentals, including VLANs, VRFs, MLAG, BGP, OSPF, route redistribution, and high availability.
• Hands-on experience with Arista EOS and CloudVision.
• Working knowledge of leaf-spine architecture, VXLAN, and EVPN.
• Experience supporting migrations from Cisco ACI to Arista.
• Experience with Palo Alto firewalls and Panorama.
• Familiarity with F5 BIG-IP, Imperva WAF, Infoblox DNS/DHCP/IPAM, and FireMon.
• Ability to create and execute implementation, validation, maintenance, and rollback plans.
• Strong troubleshooting skills using packet captures, logs, telemetry, routing tables, and monitoring tools.
• Basic automation skills using Python, Ansible, Git, REST APIs, Terraform, or Arista Validated Designs.
• Experience with ServiceNow change management and cross-team production migrations.
• Flexibility to support planned after-hours maintenance and emergency changes.
• The Network Engineer 3 will support the implementation, migration, and operation of enterprise data-center and network-security infrastructure, with a primary focus on Arista switching and Cisco ACI-to-Arista migration.
• Deploy, configure, and troubleshoot Arista switching using EOS and CloudVision.
• Support Cisco ACI-to-Arista migrations and related implementation activities.
• Implement routing, switching, segmentation, and high-availability changes.
• Coordinate integrations and dependencies across Palo Alto/Panorama, F5 BIG-IP, Imperva WAF, Infoblox, and FireMon.
• Prepare and execute implementation plans, validation steps, maintenance procedures, and rollback plans.
• Troubleshoot issues using packet captures, logs, telemetry, routing tables, and monitoring platforms.
• Automate repeatable activities using Python, Ansible, Git, REST APIs, Terraform, or Arista Validated Designs.
• Manage changes through ServiceNow and coordinate production migrations with application, server, security, and infrastructure teams.
• Support planned after-hours maintenance and emergency changes when required.