Sr. Network Infrastructure Engineer

Our client is seeking a Senior Network & Infrastructure Engineer to architect, deploy, and optimize complex on-premises infrastructure environments that support mission-critical operations. This is a highly visible technical leadership role for an engineer who thrives on solving complex challenges, driving automation, and delivering reliable, scalable network and infrastructure solutions.

This is a fully onsite, permanent position in Leesburg, VA.

Pay range: $120-$150k; salary may be negotiable based on education, experience, geographic location and other factors.

As a key member of our engineering team, you will lead the design and lifecycle management of multi-vendor networks, Linux-based infrastructure, and automation initiatives while serving as a trusted technical expert across the organization. You will have the opportunity to influence architecture decisions, own projects from concept through implementation, and modernize infrastructure through automation and innovation.

What You'll Do

Network Architecture & Engineering

• Design, implement, and optimize enterprise datacenter and remote-site network architectures with a focus on modern, software-defined networking (SDN) principles.
• Deploy, configure, and manage multi-vendor network environments, including Cisco, Arista, VyOS, and related platforms.
• Build and maintain advanced routing environments leveraging BGP, MPLS, VPNs, and Linux-based routing solutions.
• Design and support WAN and SD-WAN architectures that deliver secure, high-performance connectivity across distributed environments.
• Lead infrastructure deployments in remote datacenters, ensuring successful implementation, testing, validation, and documentation.

Infrastructure & Systems Engineering

• Administer and support Linux-based systems that underpin network and infrastructure services.
• Design, implement, and maintain network security controls, including firewalls, ACLs, and secure routing frameworks.
• Manage infrastructure lifecycle activities, including upgrades, patching, performance optimization, and capacity planning.
• Monitor infrastructure health and drive continuous improvements in reliability, resiliency, and operational efficiency.

Automation & Operational Excellence

• Champion infrastructure automation initiatives using Ansible, AWX, and configuration management tools.
• Develop repeatable, scalable deployment and management processes that reduce operational overhead and improve consistency.
• Integrate monitoring, logging, and observability platforms such as OpenSearch and Elastic to enhance visibility across the environment.
• Maintain comprehensive network documentation, architecture diagrams, and inventory records using NetBox or similar platforms.

Project Leadership

• Lead projects from inception through delivery, including requirements gathering, technical design, implementation, and validation.
• Define project scope, develop implementation plans, estimate timelines, and ensure successful outcomes.
• Serve as a technical mentor and subject matter expert, collaborating across engineering, operations, and support teams.

What You'll Bring

Required Qualifications

• Extensive experience designing, implementing, and supporting enterprise network infrastructure in on-premises and datacenter environments.
• Advanced expertise with Cisco, Arista, VyOS, and other enterprise networking platforms.
• Deep knowledge of routing technologies, including BGP, with experience supporting MPLS environments preferred.
• Strong understanding of software-defined networking (SDN) concepts and Linux-based routing architectures.
• Advanced Linux systems administration experience.
• Proven experience with infrastructure automation and configuration management technologies, with Ansible strongly preferred.
• Hands-on experience implementing firewalls, ACLs, and network security controls.
• Demonstrated success designing and deploying complex, large-scale infrastructure solutions.
• Ability to independently manage multiple projects and drive initiatives to completion.
• Strong analytical, troubleshooting, and problem-solving skills.

Preferred Qualifications

• Experience with virtualization platforms such as Proxmox.
• Expertise with OpenSearch, Elastic Stack, or similar observability and analytics platforms.
• Familiarity with PacketFence, Fluentd, Oxidized, and related infrastructure management tools.
• Experience with AWX (Ansible Tower) and enterprise automation frameworks.
• Background supporting highly customized, locally hosted infrastructure environments.
• Experience integrating networking, systems, security, and application technologies to deliver end-to-end solutions.