Network Administrator

MANTECH • Doral, FL

20d • Onsite

About The Position

MANTECH seeks a motivated, customer-oriented Network Administrator to join its team in Doral, Florida. The role supports mission networks and involves administering enterprise network infrastructure, implementing access and security policies, troubleshooting connectivity and authentication issues, maintaining network devices, and coordinating with engineering, cybersecurity, and site leadership teams.

The position follows a Panama schedule of three 12-hour shifts followed by three days off, repeating. Shifts rotate between days and nights every 90 days. The employee must be willing to work days, nights, weekends, and holidays.

Requirements

• Bachelor’s degree in Computer Science, Information Technology, Network Engineering, or a related field and at least 5 years of network administration experience; alternatively, a master’s degree and at least 3 years of relevant experience, an associate’s degree and at least 7 years, or a high school diploma and at least 9 years.
• Proven experience configuring, administering, and troubleshooting Cisco Identity Services Engine (ISE) in an enterprise environment.
• Strong background in enterprise routing, switching, 802.1X authentication, RADIUS/TACACS+ protocols, and network access control (NAC).
• Hands-on experience with network device configuration, patch management, and baseline configuration controls.
• Experience creating, maintaining, and communicating complex information technology documentation and network diagrams.
• Must hold a current, active top secret security clearance.
• Must be eligible to obtain and maintain a TS/SCI clearance.
• Must be able to remain stationary 50% of the time.
• Must occasionally move about inside the office to access file cabinets, office machinery, and similar items.
• Must frequently communicate with co-workers, management, and customers, including delivering presentations, and exchange accurate information.

Nice To Haves

• Cisco Certified Network Associate (CCNA), Cisco Certified Network Professional (CCNP Security/Enterprise), Cisco ISE Specialist, or other relevant professional certification.
• Prior experience supporting U.S. Military Command operations or Department of Defense enterprise network environments.
• Familiarity with DoD STIG compliance, network vulnerability scanning, and secure baseline auditing procedures.
• Ability to collaborate effectively across multidisciplinary engineering teams in dynamic operational settings.

Responsibilities

• Manage and administer enterprise routers, switches, firewalls, and other network infrastructure components across mission networks.
• Develop, implement, and enforce network security policies, profiling rules, and guest access workflows within Cisco ISE.
• Troubleshoot complex network connectivity issues, authentication failures, and access control policy enforcement points.
• Conduct routine system maintenance, vulnerability patching, firmware updates, and baseline configuration management for network devices.
• Collaborate with cross-functional engineering teams, cybersecurity staff, and site leadership to maintain network uptime and security compliance.
• Maintain technical documentation, network diagrams, baseline configurations, and operational inventories.

What This Job Offers

• Job Type: Full-time