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# Information System Security Engineer

- **Company:** Cyber Defense Technologies
- **Location:** Westford, MA, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Cisco PIX, Cisco IOS, Configuration Management, System Configuration, Linux, Disaster Recovery, VMware ESX Servers, Information Security Management, Junos, Routing, Windows Domain, Windows PowerShell, Red Hat Enterprise Linux, Ansible, Software Deployment, VMware VSphere, Software Vulnerability Management, Enterprise Software Applications, Firewalls (Computer Science), Juniper, Palo Alto Networks, Vcenter, Nessus, National Industrial Security Program Operating Manual (NISPOM), Firepower, Cisco, Vmware
- **Published:** October 28, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9270102/information-system-security-engineer

## About the Role

Clearance Requirements: An active Secret is required, Top Secret is preferred. Candidates who do not meet these clearance requirements will not be considered., * Network Engineering: Experience with Enterprise Switching and Firewalls highly desired (For Example: Palo Alto, Cisco ASA, Cisco Firepower, Cisco IOS, Juniper JunOS)

 * Linux Skills: Familiarity RedHat Enterprise Linux.
 * Ansible or PowerShell automation experience preferred.
 * VMware vSphere Experience (ESXi, vCenter, etc.)
 * Windows Workstation and Server deployment and administration experience.
 * Network engineering experience highly sought after., * 8+ years of experience in deploying, configuring, maintaining, and monitoring computer systems and networks.
 * Previous team leadership experience.
 * Experience with implementing highly technical solutions and reporting their importance to the organization and stakeholders.

## Description

* Systems Administration: Administer, maintain, upgrade, and ensure the readiness of several classified virtual enterprise systems and corresponding technologies (VMware, Cisco, Palo Alto, Windows Domain, Linux).
 * Security Testing: Perform continuous monitoring and systems security testing using tools like ACAS/Nessus.
 * Vulnerability Remediation: Implement and provide mitigation solutions for identified findings and patching requirements.
 * Networking: Maintain, Troubleshoot, Upgrade Switching, Routing, Firewalls
 * HBSS Maintenance: Maintain HBSS installation and ensure upstream connection.
 * Documentation & Procedures: Collaborate with the ISSO team and program/project staff to create, implement, and maintain procedural documents and operations (configuration management, continuous monitoring, business continuity, disaster recovery, etc.).
Technical Areas of Expertise:

 * Software Installations: Perform enterprise software installations and upgrades.
 * Compliance: RMF, NIST, and NISPOM requirements, configurations, settings, and documentation.