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# Senior Network Infrastructure Engineer

- **Company:** Quantum Leap Research
- **Location:** Leesburg, VA, United States
- **Experience:** Expert
- **Salary:** $155,000.0 - $175,000.0
- **Contract:** Permanent contract
- **Skills:** Proxmox, Application Layers, Border Gateway Protocol, Configuration Management, Linux, Elasticsearch, Networking Hardware, Virtual Private Networks (VPN), Multi-protocol Systems, Network Security, Linux System Administration, Network Architecture, Routing, Network Service, Ansible, System Testing, Systems Integration, Virtualization Technology, Wide Area Networks, Fluentd, Firewalls (Computer Science), Infrastructure Automation Frameworks, PfSense, Ansible Tower, OpenSearch, Cisco
- **Published:** October 17, 2026
- **Apply:** https://www.thejobnetwork.com/job/2a03ae99-c895-4ea1-9a2d-15bd8029d7db/senior-network-infrastructure-engineer

## About the Role

Required

 * Deep experience in network engineering within on-prem/datacenter environments
 * Strong expertise with:
*

 + Cisco, Arista, VyOS
 + Routing protocols (BGP required; MPLS preferred)
 + SDN and Linux-based routing
 * Strong Linux systems administration skills
 * Experience with infrastructure automation (Ansible strongly preferred)
 * Experience with configuration management and system integration
 * Hands-on experience with firewalls and network security controls
 * Proven ability to:
*

 + Design and deploy complex infrastructure
 + Work across multi-vendor environments
 + Own projects independently

Preferred

 * Experience with:
*

 + Proxmox or virtualization platforms
 + OpenSearch / Elastic stack
 + PacketFence, Fluentd, Oxidized
 + AWX (Ansible Tower)
 * Exposure to non-cloud / locally hosted infrastructure environments
 * Experience integrating networking with systems and application layers

## Description

You will serve as a technical leader responsible for building and maintaining multi-vendor network environments, while driving infrastructure automation and integration across systems., * Design and implement datacenter and site network architectures (on-prem, SDN-focused)

 * Configure and manage networking equipment: Cisco, Arista, VyOS, and other platforms
 * Build and maintain routing environments, including Linux-based routing
 * Design and support SDN, WAN/SD-WAN, BGP, MPLS, and VPN configurations
 * Deploy infrastructure into remote datacenters, including documentation and validation
 * Administer Linux systems supporting infrastructure and network services
 * Implement and manage firewalls (pfSense, VyOS, ACLs, Linux firewalls)
 * Lead infrastructure automation initiatives using Ansible and configuration management tools
 * Manage and integrate tools such as OpenSearch/Elastic and monitoring/logging systems
 * Maintain up-to-date network documentation and diagrams (NetBox or similar)
 * Own projects end-to-end:
*

 + Define scope
 + Break down work
 + Estimate timelines
 + Deliver outcomes
 * Support ongoing operations:
*

 + Patching, upgrades, and lifecycle management
 + Monitoring, troubleshooting, and optimization
 + System validation and documentation