mission-focused Principal Network Engineer

Mantech International Corporation
Chantilly, VA, United States
28 days ago
Apply on www.dice.com
Prepare application

Role details

Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Experience level
Expert
Experience required
7 years minimum
Working hours
Regular working hours
Job source

Tech stack

Microsoft Windows Agile Methodology Border Gateway Protocol Complex Networks Cyber Security System Configuration Data Centers Linux Monitoring of Systems Network Topologies Networking Hardware Multi-protocol Systems
+19 more
Local Area Networks Network Security Network Monitoring Routing Packet Analyzer Network Virtualization Open Shortest Path First (OSPF) Simple Network Management Protocols Software Deployment Encapsulation (Networking) Virtualization Technology Web Applications Network Routers Load Balancing Firewalls (Computer Science) Juniper Information Technology Nutanix Operating System Security

Job description

  • Interact with engineers, cross-functional teams, and customers at multiple levels to gather, coordinate, and deliver technical information.
  • Work closely with engineering teams to troubleshoot and build complex, highly available network topologies.
  • Develop and manage comprehensive network monitoring and alerting strategies leveraging SNMP, flow analytics, packet inspection, and infrastructure telemetry to proactively identify performance degradation, capacity constraints, and service disruptions across complex enterprise and mission-critical environments.
  • Lead complex network troubleshooting and root cause analysis across enterprise, data center, cloud, and hybrid environments, utilizing packet captures, routing analysis, traffic flow inspection, and protocol level diagnostics to rapidly identify and resolve service-impacting issues.
  • Perform engineering support and system administration for applications and systems, including installation, configuration, maintenance, patching, and backup/restore activities.
  • 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, where applicable.
  • Develop and implement automation solutions for repetitive project tasks and metrics collection using scripting, supporting testing and production deployment.
  • Perform additional project and corporate duties as assigned to support customer mission requirements.

Requirements

  • Bachelor?s degree or 4+ additional years of 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.

Preferred Qualifications:

  • Knowledge of Cross Domain Solutions (CDS) technologies on the NCDSMO approved products list.
  • Understanding of architectural principles such as defense in depth, resilience, and integrated security operations.
  • Familiarity with federal cybersecurity guidance, including NIST SP 800-37 (Risk Management Framework) and NIST SP 800-137 (Information Security Continuous Monitoring).
  • In-depth understanding and practical experience with LANs, firewalls, routers, and switches.
  • Experience working in Agile environments.

Clearance Requirements:

  • Must possess an active TS/SCI with Polygraph.

Physical Requirements:

  • Must be able to remain in a stationary position 50% of the time.
  • Must occasionally move about inside the office to access file cabinets, office machinery, or communicate with co-workers, management, and customers via email, phone, or virtual platforms, which may involve delivering presentations.

Apply for this position

This job is hosted externally. Click below to view the full posting and apply.

Apply on www.dice.com
Prepare application

Good distractions

Talks and stories from around this role — technically off-topic, practically not.

52 sec

Running persistent Linux environments directly on Windows

Ben Breard Ben Breard · World Congress 2025

3:22 min

Transitioning from software engineering to security roles

Anna Oliveira · Coffee With Developers

3:55 min

Demonstrating .NET installation on Debian and Azure Linux

Silvano Coriani Silvano Coriani · Europe 2026 Virtual

3:46 min

Navigating a career in cloud transformation consulting

Piet Van Dongen · LIVE

4:01 min

Finding personal fulfillment in the cybersecurity industry

LIVE

8:22 min

Simulating a Linux terminal and running Spring Boot

Jakov Semenski · LIVE

Videos

See all

Related articles

See all