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# Information Systems Security Engineer

- **Company:** Tetrad Digital Integrity LLC
- **Location:** Fort Belvoir, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Software Documentation, Cyber Security, Linux, Domain Name System (DNS), Hyper-V, Windows Servers, Networking Basics, Routing, Red Hat Enterprise Linux, Security Content Automation Protocol, Virtualization Technology, Software Vulnerability Management, Firewalls (Computer Science), SC Clearance, Patch Management, Nutanix, Plan of Action and Milestones, Vmware
- **Published:** September 4, 2026
- **Apply:** https://www.dice.com/job-detail/6b2fd03b-8ac2-4fc3-ab67-f68b878ecca2

## About the Role

* Strong understanding of the DoD Risk Management Framework (RMF) and experience with tools such as Enterprise Mission Assurance Support Service (eMASS), ESS/HBSS, ACAS, patching solutions, etc., * Bachelor of Science degree in a related area
 * 10-15 overall years of experience. Can have less overall YOE with a degree with 5 - 10 years of DoD/DoW experience in systems support and cybersecurity
 * DoD 8570 IAT Level II certification (such as Security+ CE, CYSA+, or CASP+ CE) is required

## Description

We are seeking an ISSE with an active Secret Clearance to provide onsite customer support at the Fort Belvoir customer site, 5 days a week., * Must possess excellent written and oral communication skills, with an ability to brief Program Management, Government customers (to include System Owner and/or COR) and Government Cybersecurity personnel. Briefings might be daily, weekly, monthly or on an ad-hoc basis. Must be detail oriented., * Create and manage authorization packages in eMASS for two enclaves. Collaborate with cybersecurity teams to support Authorization to Operate (ATO) packages, Plans of Action & Milestones (POA&Ms), and audit readiness, while maintaining detailed system documentation.

 * Document and manage vulnerabilities in a Plan of Actions and Milestones (POA&M) and provide updates on open vulnerabilities to Program Management and Government personnel.
 * Implement and maintain security controls in compliance with DISA Security Technical Implementation Guides (STIGs) and DoD cybersecurity policies to ensure the secure configuration of all systems.
 * Perform system hardening, patching, and vulnerability remediation using tools such as the Assured Compliance Assessment Solution (ACAS) and Endpoint Security Solutions (ESS).
 * Apply and manage patches and updates across all Linux and Windows systems in accordance with DoD patch management policies, ensuring timely remediation of vulnerabilities.
 * Expertise in Windows Server and/or Linux (RHEL) administration, virtualization technologies (VMware, Hyper-V, Nutanix), and a comprehensive understanding of networking fundamentals, including routing, DNS, and firewalls.
 * Hands-on experience with DoD-specific security tools such as ACAS, ESS (formerly HBSS), and Security Content Automation Protocol (SCAP) or other STIG tools.


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