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.

• 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.
• 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.

• 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 Open Search and Elastic to enhance visibility across the environment.
• Maintain comprehensive network documentation, architecture diagrams, and inventory records using Net Box or similar platforms.
• 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.

• 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.

• Experience with virtualization platforms such as Proxmox.
• Expertise with Open Search, Elastic Stack, or similar observability and analytics platforms.
• Familiarity with Packet Fence, 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.