Network LAN Engineer

Realign Llc; Liberty (NC); On-site; USD 90,000 - 120,000; Full time

Job summary

Realign Llc in Liberty, NC is seeking an experienced Network LAN Engineer to design, implement, maintain, and troubleshoot enterprise LAN infrastructure. The role emphasizes hands-on Cisco switching/routing and strong knowledge of TCP/IP, VLANs, and network security.

You will configure switches/routers, manage VLANs and inter-VLAN routing, support upgrades and migrations, and document networks. Collaboration with security, systems, and applications teams is essential.

Qualifications

• Experience designing and maintaining enterprise LAN/WAN networks.
• Hands-on with Cisco switching/routing and Catalyst switches.
• Strong TCP/IP, VLAN, STP, and inter-VLAN routing knowledge.
• Ability to troubleshoot complex network issues in production.

Responsibilities

• Design, configure, implement, and maintain LAN/WAN infrastructure.
• Configure Cisco switches and routers and manage VLANs.
• Monitor and troubleshoot network performance and availability.
• Support upgrades, migrations, and expansion.
• Maintain network documentation and runbooks.
• Collaborate with security, systems, and applications teams.
• Participate in change management and disaster recovery.
• Assist with network automation initiatives.

Skills

LAN/WAN networking

Cisco networking

Cisco Catalyst

VLAN & STP/EtherChannel

TCP/IP & OSI

OSPF & BGP

DHCP/DNS/IP addressing

Network troubleshooting

Network monitoring tools

Security: Firewalls/VPN/NAC

Documentation & Change Mgmt

Tools

Cisco DNA Center

Wireshark

SNMP

NetFlow

Python automation

Ansible automation

Job description

Liberty, North Carolina 27298 Posted October 2nd, 2026

We are seeking an experienced Network LAN Engineer to design, implement, maintain, and troubleshoot enterprise LAN infrastructure. The ideal candidate will have strong hands-on experience with switching, routing, network protocols, and network security, along with the ability to troubleshoot complex network issues in a production environment.

Key Responsibilities

• Design, configure, implement, and maintain LAN/WAN network infrastructure.
• Configure and troubleshoot Cisco switches and routers.
• Manage VLANs, STP, EtherChannel, trunking, and inter-VLAN routing.
• Work with TCP/IP, DHCP, DNS, ARP, and ICMP protocols.
• Troubleshoot network connectivity, performance, and availability issues.
• Implement and maintain Layer 2 and Layer 3 networking solutions.
• Support network upgrades, migrations, and infrastructure expansion.
• Monitor network performance and identify potential issues proactively.
• Work with firewalls, VPNs, NAC, and network security controls.
• Perform network configuration, incident resolution, and root cause analysis.
• Maintain network documentation, diagrams, configurations, and operational procedures.
• Collaborate with infrastructure, security, systems, and application teams.
• Participate in network maintenance, change management, and disaster recovery activities.
• Support enterprise network automation and configuration management where applicable.

Must-Have Skills

• Strong experience with LAN/WAN networking.
• Hands-on experience with Cisco networking technologies.
• Strong knowledge of Cisco Catalyst switches.
• Experience with VLAN, STP, RSTP, MSTP, EtherChannel, and trunking.
• Strong understanding of TCP/IP and OSI models.
• Experience with routing protocols such as OSPF and BGP.
• Knowledge of DHCP, DNS, ARP, and IP addressing/subnetting.
• Strong network troubleshooting and root cause analysis skills.
• Experience with network monitoring and troubleshooting tools.
• Knowledge of network security, firewalls, VPN, and NAC.
• Experience with network documentation and change management.

Good to Have

• Experience with Cisco DNA Center / SD-Access.
• Knowledge of SD-WAN.
• Experience with Python or Ansible for network automation.
• Knowledge of cloud networking — AWS/Azure/GCP.
• Experience with wireless LAN (WLAN) technologies.
• Familiarity with ITIL and enterprise network operations.