Senior Network Engineer (Remote) - L3 & Incident Lead

Cognizant; Madison (WI); Remote; USD 99,000 - 116,000; Full time

Job summary

Cognizant Technology Solutions Corporation is seeking a Senior Network Engineer to design, implement, secure, operate, and optimize enterprise networks across datacenters, campuses, and cloud environments. You will lead incidents, migrations, and lifetime upgrades, while collaborating with security, cloud, and architecture teams.

Required hands-on experience with F5 BIG-IP, Palo Alto, Cisco ACI/Nexus/Meraki, and cloud networking.

Qualifications

• Bachelor’s degree in CS/IT/Engineering or equivalent practical experience.
• 8+ years of enterprise network engineering experience, including senior/L3 role.
• Strong knowledge of TCP/IP, IPv4/IPv6, VLANs, STP, vPC, HSRP/VRRP, OSPF, BGP, VPN, QoS, NAT, wireless networking, and packet analysis.
• Hands‑on production experience with F5 BIG-IP LTM, Palo Alto firewalls/Panorama, Cisco ACI/APIC, Cisco Nexus, and Cisco Meraki.
• Practical Azure and/or AWS networking experience, including private connectivity to on‑premises environments.
• Hands‑on DNS, DHCP, and IPAM experience with Infoblox or a comparable enterprise DDI solution.
• Experience with Wireshark, tcpdump, network monitoring, ITIL incident/problem/change processes, and technical documentation.
• Strong communication skills and the ability to coordinate high‑severity incidents and complex changes.

Responsibilities

• Own complex P1/P2 incidents involving routing, switching, wireless, firewalls, load balancing, DNS, DHCP, IPAM, VPN, SD-WAN, and hybrid-cloud connectivity.
• Lead troubleshooting bridges, analyze packet captures and telemetry, restore service, document root cause, and implement permanent corrective actions.
• Prepare and execute implementation, validation, risk, dependency, and rollback plans for production changes and maintenance windows.
• Maintain network diagrams, standards, operating procedures, inventory, capacity plans, lifecycle roadmaps, and disaster-recovery documentation.
• Participate in on-call support, vulnerability remediation, compliance reviews, and vendor escalation activities.

Skills

TCP/IP

IPv4/IPv6

VLANs

OSPF/BGP

VPN

NAT

QoS

Wireshark

tcpdump

ITIL processes

documentation

communication

Education

Bachelor’s degree in CS/IT/Engineering

Tools

F5 BIG-IP LTM

Palo Alto / Panorama

Cisco ACI/APIC

Cisco Nexus

Cisco Meraki

Azure networking

AWS networking

Infoblox

Job description

Cognizant Technology Solutions Corporation is seeking a Senior Network Engineer to design, implement, secure, operate, and optimize enterprise networks across datacenters, campuses, and cloud environments. You will lead incidents, migrations, and lifetime upgrades, while collaborating with security, cloud, and architecture teams.

Required hands-on experience with F5 BIG-IP, Palo Alto, Cisco ACI/Nexus/Meraki, and cloud networking.