Journeyman Network Engineer

Omniscius; Arlington (VA); On-site; USD 90,000 - 120,000; Full time

Job summary

Omniscius seeks a Journeyman Network Administrator to support a mission-critical DoD environment in Arlington, VA. You will maintain secure enterprise network infrastructure across classified and unclassified environments, working with network engineers, cybersecurity professionals, and government stakeholders to ensure high availability and compliance.

You will configure Cisco switches, monitor health with SolarWinds and DNAC, and assist with DISA STIG implementations and vulnerability

Qualifications

• Active DoD Secret Clearance and ability to obtain TS/SCI.
• Experience administering enterprise Cisco networks.
• Strong knowledge of TCP/IP, VLANs, IPv6, routing and switching.
• Familiarity with DISA STIG implementation and cybersecurity compliance.
• Experience monitoring with SolarWinds and using Cisco DNAC.

Responsibilities

• Administer and maintain enterprise network infrastructure for classified and unclassified environments.
• Troubleshoot connectivity issues including routing, VLANs, and switch ports.
• Configure Cisco switches, IOS updates, and backups.
• Monitor network health with SolarWinds and DNAC.
• Support VMware ESXi and Windows Server infrastructure.
• Handle vulnerability remediation and coordination with cybersecurity teams.
• Maintain network diagrams, SOPs, and asset inventories.
• Provide after-hours support in a 24x7 environment.

Skills

Network troubleshooting

TCP/IP

VLANs

Routing & Switching

Cisco IOS

Analytical skills

Communication skills

IAT II Certification

Education

High School Diploma or GED

DoD IAT Level II Certification

Tools

SolarWinds

Cisco Catalyst Center (DNAC)

ForeScout

ACAS

Nessus

Job description

We're seeking a Journeyman Network Administrator to support a mission-critical Department of Defense environment in Arlington, VA. In this role, you'll be responsible for maintaining secure enterprise network infrastructure supporting both classified and unclassified environments. You'll work alongside network engineers, cybersecurity professionals, and government stakeholders to ensure high availability, performance, and compliance across the enterprise.

If you're passionate about Cisco networking, troubleshooting complex enterprise environments, and supporting national security missions, we'd like to hear from you.

What You'll Do

• Administer and maintain enterprise network infrastructure supporting classified and unclassified environments
• Troubleshoot Layer 1-3 connectivity issues including routing, VLANs, switch ports, and network performance
• Configure, update, and maintain Cisco switches, firmware, IOS upgrades, and configuration backups
• Monitor network health using SolarWinds and Cisco Catalyst Center (DNAC)
• Support VMware ESXi environments and Windows Server infrastructure
• Manage ForeScout network access control and Cisco ISE authentication services
• Troubleshoot IPv6 networking and wireless infrastructure
• Perform DISA STIG implementation, validation, and remediation activities
• Support vulnerability remediation efforts using ACAS findings in coordination with cybersecurity personnel
• Maintain network documentation, diagrams, SOPs, and asset inventories
• Resolve Tier III network incidents and support Help Desk escalations
• Participate in change management activities and maintain accurate technical documentation
• Provide occasional after-hours support within a 24x7 operational environment

Required Qualifications

• Active DoD Secret Clearance
• Ability to obtain and maintain a Top Secret/SCI clearance
• U.S. Citizenship
• High School Diploma or GED
• Active DoD IAT Level II certification (Security+, CCNA, Microsoft Windows Server Certification, or equivalent)
• Experience administering enterprise Cisco network environments
• Strong understanding of:
  • TCP/IP
  • VLANs
  • IPv6
  • Routing and switching
  • Network troubleshooting
• Experience with Cisco Catalyst Center (DNAC)
• Experience using SolarWinds for monitoring and troubleshooting
• Experience supporting ForeScout network visibility or access control
• Familiarity with DISA STIG implementation and cybersecurity compliance
• Experience documenting network architectures and technical procedures
• Strong analytical, troubleshooting, and communication skills
• Experience supporting DoD, Federal, or Intelligence Community networks preferred

Preferred Qualifications

• Active Secret Clearance with the ability to obtain Top Secret/SCI Clearance
• Five or more years of enterprise network administration experience
• Cisco and ForeScout certifications
• Experience with:
  • ServiceNow
  • Azure AD
  • Microsoft Intune
  • Office 365
  • Active Directory
  • DNS
  • DHCP
  • Group Policy
  • Windows Server Administration
• Experience supporting RMF-accredited environments
• Familiarity with ACAS, Nessus, Tenable, SCAP, STIG Viewer, eMASS, and vulnerability management tools
• Experience creating technical reports, outage summaries, and network diagrams
• Knowledge of cryptographic devices supporting classified networks