Senior Network Engineer - L3 Ops & Cloud Networking

Cognizant; Lansing (MI); 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 datacenter, campus, branch, wireless, and hybrid-cloud networks. The role requires hands-on expertise with F5 BIG-IP, Palo Alto, Cisco ACI/Nexus/Meraki, cloud networking, and enterprise DDI platforms.

You will serve as an L3 escalation point and lead major incidents.

Qualifications

• Bachelor’s degree in computer science, information technology, engineering, or equivalent practical experience.
• 8+ years of enterprise network engineering experience, including at least 3 years in a senior or L3 role.
• Advanced 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

Network engineering

L3 escalation

Incident troubleshooting

DNS/DHCP/IPAM

Cloud networking

Security hardening

Education

Bachelor's degree in computer science / IT / Engineering

Tools

F5 BIG-IP

Palo Alto Panorama

Cisco ACI/APIC

Cisco Nexus

Cisco Meraki

Infoblox

Wireshark

tcpdump

Terraform/Automation

Ansible

Job description

Cognizant Technology Solutions Corporation is seeking a Senior Network Engineer to design, implement, secure, operate, and optimize enterprise datacenter, campus, branch, wireless, and hybrid-cloud networks. The role requires hands-on expertise with F5 BIG-IP, Palo Alto, Cisco ACI/Nexus/Meraki, cloud networking, and enterprise DDI platforms.

You will serve as an L3 escalation point and lead major incidents.