Senior Network Engineer — TS/SCI Eligible & Cross-Domain

System One; Lorton (VA); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Health and welfare benefits

401(k) plan

Job summary

System One is seeking a mid to senior level Network Engineer in Lorton, VA to support a mission-critical government environment. The role focuses on network infrastructure management, network security, cross-domain solutions, and modernization efforts, serving as the primary technical expert for enterprise networking operations.

The ideal candidate will hold a BS or higher with extensive experience, CCNP, and hands-on experience with Cisco LAN/WAN switches and Firewalls, and familiarity with

Qualifications

• Bachelor's degree with 8+ years of relevant experience or Master's with 6+ years of relevant experience.
• CCNP certification.
• Experience deploying and managing LAN and WAN Switches and Firewalls, including Cisco 2900, 4500, 9300, 9400, 6800, Nexus 9000, and Cisco Firepower, ASA.
• Strong knowledge of defense-in-depth principles, network security architecture, and common security elements.
• Experience with installation, configuration, and maintenance of network equipment.
• Experience with incident lifecycle management, incident response, and mitigation strategies.
• Network management experience with Solarwinds, WhatsUP Gold, NetQoS, NetBrain; familiar with VMWARE, Linux, Microsoft Server, and Active Directory.
• Ability to build firewall policies and optimize rules for threat prevention.
• Support for ATO reviews and audits.
• Ability to obtain DHS EOD SCI clearance.
• Education: BS degree; preferred Master's in IT Management, Engineering, or related field.
• Strong communication skills and ability to work collaboratively in a team environment.

Responsibilities

• Support the ITP network infrastructure, perform routine maintenance activities, and provide guidance on upgrades and system recapitalization.
• Oversee High Speed Guard Cross Domain solution supporting data transfer between multiple classification domains.
• Support all documentation to effectively capture the configuration baseline.
• Design and support system recapitalization plans to accommodate capacity growth and changes as directed by the customer.
• Serve as the subject matter expert on all ITP network infrastructure.

Skills

LAN/WAN switches

Firewalls

Cisco equipment

Network security

Incident response

Solarwinds

WhatsUP Gold

NetQoS

NetBrain

VMware

Linux

Active Directory

CCNP

Education

Bachelor's degree

Master's degree

Tools

Solarwinds

WhatsUP Gold

NetQoS

NetBrain

VMware

Linux

Microsoft Server

Active Directory

Cisco IOS

Job description

System One is seeking a mid to senior level Network Engineer in Lorton, VA to support a mission-critical government environment. The role focuses on network infrastructure management, network security, cross-domain solutions, and modernization efforts, serving as the primary technical expert for enterprise networking operations.

The ideal candidate will hold a BS or higher with extensive experience, CCNP, and hands-on experience with Cisco LAN/WAN switches and Firewalls, and familiarity with