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Senior Network Security Engineer
ManTech International
Remote, USA
Full-time
Senior · 5+ years experience
Remote
USD 117000-195100 yearly / year
Discovered 2 days ago
Palo Alto Networks Next-Generation FirewallsFortinet FortiGateJuniperBrocadeAnsibleGitLab CI/CD
Free
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Palo Alto Networks Next-Generation FirewallsFortinet FortiGateJuniper
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Palo Alto Networks Next-Generation FirewallsFortinet FortiGateJuniperBrocadeAnsibleGitLab CI/CD
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Description & Requirements
- MANTECH seeks a motivated, career and customer-oriented Senior Network Security Engineer to join our team in either Fairmont, WV, Boulder CO, or REMOTE (US-Based) .
- The Senior Network Security Engineer will serve as a technical anchor, driving network modernization efforts, eliminating operational silos, and leading the transition from legacy, colocation-dependent architectures to a secure, cloud-integrated Trusted Internet Connection (TIC) 3.0 framework. The candidate must possess a strong, proactive problem-solving mindset and be comfortable working in a high-tempo, availability-first environment.
Responsibilities include but are not limited to:
- Perimeter Architecture & TIC 3.0 Transition: Design, configure, and maintain our geographically distributed network boundaries. Architect and engineer secure site-to-site IPsec VPN tunnels and related components to modernize our boundary from TIC 2.0 colocation centers to cloud-integrated TIC 3.0 secure overlays.
- Multi-Vendor Firewall & Switching Engineering: Perform expert-level administration, configuration, and troubleshooting of our enterprise firewall and switching planes. This includes configuring and managing products that may include, Palo Alto Networks Next-Generation Firewalls, Fortinet FortiGate appliances, as well as Juniper and Brocade switches.
- GitOps & Automation Integration: Maintain and enforce network configuration baselines using Infrastructure as Code (IaC) techniques. Collaborate with our tools development team to write and execute Ansible playbooks and GitLab CI/CD pipelines to automate VLAN assignments, port configuration, and dynamic DNS sinkhole blocks.
- Network Observability & Traffic Analysis: Utilize packet brokers to capture and route packet streams. Operate tools and technologies to monitor internal network flows and detect anomalous lateral movement. Integrate out-of-band network probing utilities to continuously track perimeter performance.
- Technical Documentation & Configuration Management: Develop and maintain up-to-date, accurate documentation of network cabling, IP Addresses, MAC addresses, and VLAN assignments for critical systems. Utilize tools to generate dynamic network topology maps, execute runbooks, and automate configuration drift audits.
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