Cisco ISE Network Administrator — Top Secret Clearance

MANTECH; Florida; On-site; USD 90,000 - 120,000; Full time

Job summary

MANTECH in Doral, FL seeks a Network Administrator to support enterprise networking for mission networks. You will configure Cisco ISE, manage routers, switches, and firewalls, and enforce 802.1X authentication and NAC across the environment.

Collaborate with engineering, cybersecurity, and site leadership to maintain uptime, document networks, and ensure security compliance in a DoD-focused setting. A Top Secret clearance is required, with strong documentation and cross-team communication

Qualifications

• Experience configuring, administering, and troubleshooting Cisco ISE in enterprise environments.
• Strong background in enterprise routing, switching, 802.1X authentication, and NAC.
• Proven capability to document networks and create diagrams.

Responsibilities

• Configure, deploy, and maintain Cisco ISE for access control and posture assessment.
• Manage routers, switches, firewalls, and network infrastructure across mission networks.
• Develop and enforce network security policies and guest access workflows.
• Troubleshoot connectivity, authentication failures, and policy enforcement issues.
• Perform routine maintenance, patching, and baseline configuration management.
• Collaborate with engineering, cybersecurity, and site leadership to ensure uptime.
• Maintain accurate network docs, diagrams, and inventories.

Education

Bachelor’s degree in Computer Science / IT / Network Engineering

Master’s degree and 3+ years of experience

Associate’s degree and 7+ years of experience

High school diploma with 9+ years of experience

Tools

Cisco Identity Services Engine (ISE)

RADIUS/TACACS+

NAC (Network Access Control)

Job description

MANTECH in Doral, FL seeks a Network Administrator to support enterprise networking for mission networks. You will configure Cisco ISE, manage routers, switches, and firewalls, and enforce 802.1X authentication and NAC across the environment.

Collaborate with engineering, cybersecurity, and site leadership to maintain uptime, document networks, and ensure security compliance in a DoD-focused setting. A Top Secret clearance is required, with strong documentation and cross-team communication