Network Engineer, Centrix

MANTECH • Doral, FL

20d • Onsite

About The Position

MANTECH is seeking a motivated, career- and customer-oriented Network Engineer to join its team onsite in Doral, Florida. The role supports CENTRIXS Combined Federated Server/Combined (CFS/C) capabilities by designing, deploying, configuring, and maintaining enterprise network infrastructure and coalition network architectures. The engineer works with routers, switches, firewalls, network crypto devices, and cross-domain systems to support secure multinational interoperability. The position also involves troubleshooting network issues, maintaining system baselines and engineering documentation, and improving network performance and security compliance.

Applicants must hold a current, active Top Secret security clearance. The role requires the ability to remain stationary for 50% of the time, occasionally move around the office to access equipment and files, and frequently communicate accurate information to coworkers, management, and customers, including through presentations.

Requirements

• Bachelor’s degree in Network Engineering, Computer Science, Information Technology, or a related field and 5 or more years of enterprise network engineering experience; alternatively, a master’s degree and 3 or more years of relevant experience, an associate’s degree and 7 or more years, or a high school diploma and 9 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, including BGP, OSPF, and EIGRP, as well as 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 stationary for 50% of the time.
• Must occasionally move about inside the office to access file cabinets, office machinery, and similar items.
• Must frequently communicate with coworkers, 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

• 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 engineering process improvements to enhance coalition network performance and security compliance.

What This Job Offers

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