LAN/WAN Engineer: responsibilities, education, skills and career path

Designs and operates LAN and WAN connectivity for sites, branches and data centres.

Entry

Intermediate

Coding

Low

Key skills

LAN/WAN designRouting (OSPF/BGP)Switching (VLAN/STP)Troubleshooting

Common progression

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Career overview

The LAN/WAN Engineer builds the wired backbone of the organisation: campus and data-centre LANs, inter-site WAN links, routing protocols, segmentation and interconnections. They design for performance, redundancy and security, and troubleshoot the latency, packet loss and routing issues that affect every other IT service. It is a core networking role and a natural path toward SD-WAN and network architecture.

Main responsibilities

Design LAN, WAN and interconnection architectures
Configure switches, routers, VLANs and Wi-Fi
Troubleshoot latency, packet loss and routing issues
Manage firewall rules, VPN and network segmentation
Monitor platform health, alerts and dashboards
Prepare and execute change requests in production
Keep technical documentation up to date
Lead incident resolution and post-mortem analysis
Follow capacity, performance and resource usage
Coordinate with software vendors and third parties

Technical skills

LAN/WAN design85%

Routing (OSPF/BGP)80%

Switching (VLAN/STP)80%

Firewall & segmentation70%

Troubleshooting75%

Monitoring65%

Network security65%

Scripting40%

Capacity planning60%

Vendor management55%

Technologies

CiscoJuniperAristaBGPOSPFVLANSTPIPsecWiresharkNetboxZabbixSolarWindsPythonGitDNSDHCPBashTeams

Education level

Education requirements vary depending on the company, country and experience. Professional experience, certifications and technical skills can sometimes compensate for formal education.

High School / Bac

Less common

Bac+2 (2-year degree)

Less common

Bac+3 (Bachelor)

Common entry point

Bac+5 (Master / Engineering)

Common entry point