Network Engineer
TS/SCI and Full Scope Poly
Reston, VA 
200K-250K 

Are you a highly experienced Network Engineer with a passion for secure, scalable infrastructure design and implementation? We’re looking for a Subject Matter Expert (SME) Network Engineer who thrives in complex, mission-critical environments and brings deep knowledge of network architecture, cloud integration, and Network Access Control (NAC) technologies.

The ideal candidate will bring experience in enterprise network engineering, with hands-on expertise in Cisco platforms, NAC implementations, and secure hybrid-cloud network solutions. The location of this job is Herndon, VA.

Responsibilities:

• Design, implement, and manage complex enterprise network architectures across on-prem and cloud environments (AWS, Azure, etc.)
• Deploy and optimize Network Access Control (NAC) solutions, particularly Cisco ISE, across a wide range of network appliances and endpoints
• Configure and troubleshoot core network services including routing (EIGRP, BGP), switching (STP, LACP), and security protocols (ACLs, VPNs, firewalls)
• Monitor network performance, identify potential threats, and implement remediation strategies proactively
• Support network automation, virtualization, and SDN efforts to modernize infrastructure and improve operational agility
• Create and maintain technical documentation including architecture diagrams, design specs, implementation plans, and operational procedures
• Collaborate with cross-functional teams and mentor junior engineers on network engineering best practices and security standards

Requirements: 

• Technical Bachelors Degree 
• Experience in designing and managing enterprise networks with a strong focus on Cisco platforms
• Deep understanding of network protocols (TCP/IP, DNS, DHCP, etc.) and routing/switching technologies
• Proficiency with NAC platforms and security tools (Cisco ISE, Cisco ASA/FTD, etc.)
• Experience with Linux systems, network scripting (e.g., Python), and infrastructure automation tools
• Strong understanding of cloud networking principles and hybrid-cloud architectures (AWS, Azure, Google Cloud, etc.)