Network Administrator - ISE, DoD Ready, TS/SCI

ManTech; Florida; On-site; USD 70,000 - 110,000; Full time

Job summary

ManTech seeks a Network Administrator in Doral, FL on a Panama schedule (three 12-hour shifts, rotation every 90 days). The role requires managing enterprise network infrastructure, implementing security policies with Cisco ISE, and coordinating with engineering and cybersecurity teams to ensure uptime and compliance.

Candidates should have 5+ years in network administration and demonstrated ISE expertise, with DoD-style security clearance familiarity.

Qualifications

• Bachelor’s degree in Computer Science, Information Technology, Network Engineering, or related field with 5+ years of network admin experience.
• Master’s degree and 3+ years relevant experience; or Associate’s degree with 7+ years; or HS diploma with 9+ years.
• Proven experience configuring, administering, and troubleshooting Cisco ISE in an enterprise environment; strong background in enterprise routing, switching, 802.1X, RADIUS/TACACS+ and NAC.
• Hands-on experience with network device configuration, patch management, and baseline configuration controls; experience documenting network diagrams.

Responsibilities

• Managing and administering enterprise routers, switches, firewalls, and network infrastructure across mission networks.
• Developing, implementing, and enforcing network security policies, profiling rules, and guest access workflows within Cisco ISE.
• Troubleshooting complex network connectivity issues, authentication failures, and NAC policy enforcement points.
• Routine system maintenance, vulnerability patching, firmware updates, and baseline configuration management for network devices.
• Collaborating with cross-functional engineering teams, cybersecurity staff, and site leadership to maintain network uptime and security compliance.
• Maintaining accurate technical documentation, network diagrams, baseline configurations, and inventories.

Skills

Network administration

Network security policies

Documentation

Cross-functional collaboration

Education

Bachelor’s degree in CS/IT/Network Engineering

Master’s degree (related field)

Associate’s degree (related field)

High school diploma (with relevant experience)

Tools

Cisco ISE

802.1X authentication

RADIUS/TACACS+

Network device configuration

Job description

ManTech seeks a Network Administrator in Doral, FL on a Panama schedule (three 12-hour shifts, rotation every 90 days). The role requires managing enterprise network infrastructure, implementing security policies with Cisco ISE, and coordinating with engineering and cybersecurity teams to ensure uptime and compliance.

Candidates should have 5+ years in network administration and demonstrated ISE expertise, with DoD-style security clearance familiarity.