Senior Network Architect (On-Site) – TS/SCI Eligible

Gdh Consulting, Inc.; St. Louis (MO); On-site; USD 187,000 - 228,000; Full time

Benefits offered by this job

Medical insurance options

Dental insurance

Vision insurance

Life insurance

Disability insurance

Pet insurance

Wellbeats membership

Gym membership discount

Holiday pay

401(k) plan

Direct deposit

Employee referral program

Job summary

GDH Consulting, Inc. is seeking a Senior Network Architect to design and implement enterprise-grade networks in a fast-paced environment. You will lead architecture across Arista EOS, Cisco routing/switching, and F5 BIG-IP platforms, and guide modernization efforts with automation and observability.

You will collaborate with security, cloud, and infra teams, mentor engineers, and participate in architectural reviews to shape scalable, highly available networks and data center transformations.

Qualifications

• 10+ years of experience in network engineering or infrastructure architecture.
• Expertise in Arista EOS, Cisco routing and switching, and F5 BIG-IP platforms.
• Deep knowledge of BGP, OSPF, IS-IS, and advanced routing design.
• Experience with spine-leaf and modern data center architectures, VXLAN/EVPN overlays, and high availability setups.
• Strong troubleshooting skills in multi-vendor network environments.
• Proven ability to design large-scale enterprise and service provider networks.
• Excellent documentation and architectural design skills.
• This position requires eligibility for a U.S. Government security clearance. In accordance with federal law, U.S. citizenship is required.
• Active U.S. security clearance required, or the ability to obtain and maintain one (Top Secret/SCI with willingness to obtain a CI Polygraph).

Responsibilities

• Architect and design high-performance, highly available network solutions utilizing Arista, Cisco, and F5 platforms.
• Serve as the escalation point for advanced network and application delivery issues.
• Develop and implement Layer 2-Layer 7 solutions, including routing, traffic engineering, and application delivery strategies.
• Lead network modernization efforts, including automation, infrastructure as code, and observability enhancements.
• Establish operational standards, reference architectures, and best practices for network management.
• Collaborate with security, cloud, and infrastructure teams to ensure secure, scalable network design.
• Evaluate emerging networking technologies and recommend adoption strategies.
• Manage large-scale network migrations, upgrades, and data center transformations.
• Mentor senior and mid-level engineers on troubleshooting, design, and operational best practices.
• Participate in architectural review boards and strategic planning initiatives.

Skills

Arista EOS

Cisco routing

Cisco switching

F5 BIG-IP

BGP

OSPF

IS-IS

VXLAN/EVPN

Data center design

Security clearance

Documentation

Job description

GDH Consulting, Inc. is seeking a Senior Network Architect to design and implement enterprise-grade networks in a fast-paced environment. You will lead architecture across Arista EOS, Cisco routing/switching, and F5 BIG-IP platforms, and guide modernization efforts with automation and observability.

You will collaborate with security, cloud, and infra teams, mentor engineers, and participate in architectural reviews to shape scalable, highly available networks and data center transformations.