Senior Systems Engineer (Firewall) - Enterprise Network Security

100% Remote

We are seeking a seasoned Sr. Systems Engineer (Firewall) to provide technical leadership across enterprise network security, firewall administration, routing, and automation initiatives. This engineer will design secure network solutions, lead major firewall and segmentation efforts, improve rule hygiene, and partner closely with systems, virtualization, application, and infrastructure teams. The ideal candidate brings a blend of data center networking experience, firewall SME depth, and the ability to drive complex projects with minimal oversight.

Responsibilities

• Design, implement, and support enterprise network security solutions across multi-site environments.
• Manage and optimize next-generation firewalls, including rule sets, routing, segmentation, and security policies.
• Lead firewall migrations, cleanup/remediation efforts, and rule-hygiene initiatives.
• Architect and implement Zero Trust frameworks across distributed environments.
• Develop automation solutions using Ansible, Python, Postman, or similar tools to streamline network operations.
• Troubleshoot advanced firewall/blocking issues, including Layer 2/3 interactions, routing problems, and system-to-system communication flows.
• Work with systems, Linux/Windows platform teams, virtualization teams, and application owners to map dependencies and build accurate topology documentation.
• Support environments that handle PCI/PII/sensitive data and ensure security controls meet compliance needs.
• Provide architectural guidance, mentor junior engineers, and drive cross-team project work.
• Evaluate current network/security posture and recommend improvements to reduce risk and increase efficiency.
• Contribute to design diagrams, communication matrices, ports/protocol mappings, and documentation.