Senior Network Engineer – Enterprise Routing & Modernization

Gdh Consulting, Inc.; Washington (District of Columbia); On-site; USD 127,000 - 141,000; Full time

Benefits offered by this job

Health benefits

Dental & Vision

Wellbeats membership

Gym discount

Job summary

GDH is seeking an experienced network engineer to design, implement, and support advanced enterprise routing and switching infrastructures. The role focuses on modernization, upgrades, and secure operations within a regulated environment.

The candidate will troubleshoot complex networks, manage Cisco technologies including ISE and Catalyst Center, and collaborate with cross-functional teams to ensure optimal performance and security compliance.

Qualifications

• 10–12 years of hands-on network engineering experience focused on routing and switching.
• Strong knowledge of Cisco routing/switching technologies, including Cisco ISE and Catalyst Center.
• Experience supporting network refresh, migration, modernization, and equipment replacement initiatives.
• Advanced troubleshooting with VLANs, trunking, STP, OSPF, BGP, QoS, LACP, ARP, and related networking technologies.
• Strong understanding of network security concepts for secure enterprise environments.
• U.S. citizenship and DoD 8570 IAT II certification required.

Responsibilities

• Design, implement, maintain, and support enterprise routing and switching environments.
• Support network refresh, replacement, migration, and modernization initiatives.
• Troubleshoot complex network issues involving VLANs, trunking, STP, OSPF, BGP, QoS, LACP, ARP, and related technologies.
• Configure, manage, and optimize Cisco routing and switching technologies, including Cisco ISE and Catalyst Center.
• Apply network security principles and established standards to support secure network operations.
• Collaborate with cross-functional teams to coordinate network configurations, upgrades, migrations, and troubleshooting.

Skills

Cisco routing & switching

Network security concepts

VLANs, STP, OSPF, BGP, QoS

LACP & ARP troubleshooting

Education

DoD 8570 IAT Level II

Tools

Cisco ISE

Catalyst Center

Job description

GDH is seeking an experienced network engineer to design, implement, and support advanced enterprise routing and switching infrastructures. The role focuses on modernization, upgrades, and secure operations within a regulated environment.

The candidate will troubleshoot complex networks, manage Cisco technologies including ISE and Catalyst Center, and collaborate with cross-functional teams to ensure optimal performance and security compliance.