Senior Network Architect for Secure Enterprise Networks

MANTECH; Chantilly (VA); On-site; USD 120,000 - 170,000; Full time

Job summary

MANTECH in Chantilly, VA seeks a Principal Network Engineer to design, implement, and secure complex enterprise networks supporting critical customer missions. You will deliver resilient, highly available networks and drive operational excellence across technical teams.

You will lead troubleshooting, implement automation, and coordinate with stakeholders to sustain secure, scalable infrastructure across on-premise, data center, cloud, and hybrid environments.

Qualifications

• Bachelor's degree or 4+ years IT experience in lieu of degree.
• 7+ years of experience in cybersecurity or network engineering.
• Proficiency in configuring and optimizing routing protocols like BGP and OSPF.
• Direct experience implementing network virtualization and encapsulation technologies (EVPN-VXLAN, MPLS).
• Solid understanding of traffic management and security perimeter defenses, including load balancers, firewalls, and virtualized infrastructure.
• Experience troubleshooting web application traffic to include a strong understanding of HTTPS transactions and mutual TLS (mTLS).
• Strong understanding of Windows and Linux systems, operating system security practices, and network security concepts.
• Experience deploying, upgrading, and troubleshooting multi-vendor network equipment and solutions, such as Juniper, Palo Alto, F5, and Nutanix.
• Experience leveraging SNMP monitoring tools.
• Must have or be willing to obtain an IAT Level II (or higher) certification within 6 months of hire.

Responsibilities

• Interact with engineers, cross-functional teams, and customers at multiple levels to gather, coordinate, and deliver technical information.
• Troubleshoot and build complex, highly available network topologies across enterprise and data center environments.
• Develop and manage network monitoring and alerting strategies leveraging SNMP, flow analytics, and telemetry.
• Lead complex network troubleshooting and root cause analysis across enterprise, data center, cloud, and hybrid environments.
• Perform engineering support and system administration for applications and systems, including installation, configuration, maintenance, patching, and backup/restore.
• Provide Tier 2/3 maintenance and engineering support for deployed network and cybersecurity technologies.
• Support Assessment and Authorization (A&A) activities related to cybersecurity technologies.
• Develop and implement automation solutions for repetitive project tasks and metrics collection.
• Perform additional project and corporate duties as assigned to support customer mission requirements.

Skills

BGP

OSPF

EVPN-VXLAN

MPLS

SNMP

HTTPS/mTLS

Windows-Linux security

Multi-vendor networking

IAT Level II

Education

Bachelor's degree

4+ years IT experience in lieu of degree

Tools

SNMP monitoring tools

Job description

MANTECH in Chantilly, VA seeks a Principal Network Engineer to design, implement, and secure complex enterprise networks supporting critical customer missions. You will deliver resilient, highly available networks and drive operational excellence across technical teams.

You will lead troubleshooting, implement automation, and coordinate with stakeholders to sustain secure, scalable infrastructure across on-premise, data center, cloud, and hybrid environments.