Lead Network Engineer, Centrix

MANTECH • Doral, FL

20d • Onsite

About The Position

MANTECH is seeking a motivated, customer-oriented Lead Network Engineer to join its team in Doral, Florida. The role provides technical leadership and mentorship to junior IT staff and help desk technicians while designing, deploying, configuring, and maintaining enterprise network infrastructure supporting CENTRIXS Combined Federated Server/Combined (CFS/C) capabilities. The engineer manages enterprise routers, switches, firewalls, network crypto devices, and cross-domain coalition network architectures; troubleshoots complex network and connectivity issues; and works with technical teams, coalition partners, and leadership to ensure secure multinational network interoperability. The position also involves routine maintenance, firmware upgrades, vulnerability patching, configuration management, maintaining system baselines and engineering documentation, and recommending process improvements that enhance performance and security compliance. A current, active Top Secret security clearance is required.

Requirements

• Bachelor’s degree in Network Engineering, Computer Science, Information Technology, or a related field and 7 or more years of enterprise network engineering experience; alternatively, a master’s degree and 5 or more years of relevant experience, an associate’s degree and 9 or more years, or a high school diploma and 11 or more years.
• Proven experience configuring, administering, and troubleshooting CENTRIXS network systems, coalition WAN/LAN environments, or cross-domain networks.
• Strong background in enterprise routing and switching protocols (BGP, OSPF, EIGRP), VPNs, firewalls, and network access control.
• Experience maintaining network baselines, baseline documentation controls, and security patch deployment schedules.
• Experience creating, maintaining, and communicating complex technical engineering documentation and coalition network topology diagrams.
• Must hold a current, active Top Secret security clearance.
• Must be able to remain in a stationary position 50% of the time.
• Occasionally move about inside the office to access file cabinets, office machinery, and similar items.
• Frequently communicate with co-workers, management, and customers, including delivering presentations, and exchange accurate information.

Nice To Haves

• Professional certifications such as Cisco Certified Network Associate (CCNA), Cisco Certified Network Professional (CCNP Enterprise/Security), or CompTIA Security+.
• Prior experience supporting U.S. Military Command operations, Combatant Command environments, or multinational coalition networks.
• Familiarity with DoD STIG compliance, automated vulnerability scanning tools (ACAS), and crypto key management (HAIPE/TACLANE).
• Ability to collaborate effectively across multidisciplinary engineering teams in fast-paced operational environments.

Responsibilities

• Provide technical leadership and mentorship to junior IT staff and help desk technicians, establishing best practices for daily operations.
• Design, deploy, configure, and maintain enterprise network infrastructure supporting CENTRIXS Combined Federated Server/Combined (CFS/C) capabilities.
• Manage enterprise routers, switches, firewalls, network crypto devices, and cross-domain coalition network architectures.
• Troubleshoot complex network routing and switching protocols, coalition data flows, and hardware connectivity issues.
• Collaborate with cross-functional technical teams, coalition partners, and leadership to ensure secure multinational network interoperability.
• Conduct routine network maintenance, firmware upgrades, vulnerability patching, and configuration management controls.
• Maintain system baselines, configuration management records, and engineering documentation across CENTRIXS network nodes.
• Recommend and implement continuous engineering process improvements to enhance coalition network performance and security compliance.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior