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# Network Engineer L3

- **Company:** LTM Inc
- **Location:** Houston, TX, United States
- **Experience:** Expert
- **Salary:** $130,000.0 - $140,000.0
- **Contract:** Internship / Graduate position
- **Skills:** Amazon Web Services, Microsoft Azure, Border Gateway Protocol, Cisco PIX, Cisco Routers, Cloud Computing, Complex Networks, Data Centers, Enhanced Interior Gateway Routing Protocol, EtherChannel, Monitoring of Systems, Internet Protocol Security (IP SEC), Virtual Private Networks (VPN), Routing, Open Shortest Path First (OSPF), Paessler Router Traffic Grapher, Remote Access Technology, Virtual Local Area Networks, Wireless Networks, Computer Networking Systems, Computer Network Operations, System Availability, Amazon Virtual Private Cloud (VPC), Cisco Firewalls, SolarWinds (Software), Network Support, Fortinet, Routing & Switching, Firepower, Cisco, SSL VPN
- **Published:** October 12, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=5441ef7735a2c485

## About the Role

* Cisco Firewalls
 * Cisco ASA Firepower FTD
 * NAT ACLs IPsec SSL VPN
 * High Availability upgrades
 * Routing Switching
 * Strong handson with Cisco Routers Switches
 * OSPF BGP EIGRP
 * VLANs STP HSRPVRRP VPC EtherChannel

Troubleshooting

 * Deep packetlevel and protocollevel troubleshooting
 * Handling highseverity incidents in production

Good to Have

 * Exposure to Fortinet Palo Alto firewalls
 * Experience with Data Center or Enterprise networks
 * Monitoring tools SolarWinds PRTG SNOW
 * Basic understanding of cloud networking Azure AWS connectivity
 * ITIL process awareness Incident Change Problem Management

Experience Qualifications

 * 6 to 10 years of experience in Network Operations Network Support
 * Strong experience in L3 operational support roles
 * Cisco certifications CCNP CCIE preferred not mandatory, Mandatory Skills : Cisco DC/Branches Routers & Switches, Cisco Wireless, Cisco-sdn-network-administration
Good to Have Skills : AWS Infra Services, Azure Infra Services
Other details

## Description

We are looking for a Network Operations L3 Engineer to provide advanced operational support troubleshooting and implementation for enterprise network infrastructure The role involves handling complex incidents leading changes and acting as an SME for Cisco Firewalls and Routing Switching environments, * Provide L3 support for production network environments including incident resolution root cause analysis and preventive actions

 * Troubleshoot and resolve complex network issues related to routing switching and firewall technologies
 * Configure manage and optimize Cisco Firewalls ASA Firepower FTD including
 * ACLs NAT VPN SitetoSite Remote Access
 * Policy changes upgrades and failover scenarios
 * Design configure and support Routing Switching infrastructure
 * Routing protocols OSPF BGP EIGRP
 * Switching technologies VLANs STP HSRPVRRP PortChannels
 * Lead and execute network changes upgrades migrations and maintenance activities following ITIL processes
 * Act as escalation point for L2NOC teams and mentor junior engineers
 * Participate in problem management RCA documentation and service improvement initiatives
 * Work closely with security cloud and application teams during outages and project activities
 * Maintain technical documentation HLDLLD SOPs runbooks change records