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Sr Information Systems Security Officer (ISSO), Advisor – TS/SCI w/poly

Peraton · Washington, DC, US

onsitesenior$146,000–$234,000Posted Sep 4, 2026NIST SP 800-53NIST SP 800-53ARMF v5eMASSeMASSSplunkTenable NessusCISSP

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About this role

## Sr Information Systems Security Officer (ISSO), Advisor – TS/SCI w/poly ### Responsibilities - Apply best practices for cybersecurity program standards, processes, procedures, and industry-standard security frameworks. - Implement and assess security controls in accordance with **NIST SP 800-53** and **NIST SP 800-53A** requirements/guidance. - Develop security policies and procedures, including **CSS**, **SSP**, **SSPP**, and assess **ATO package artifacts**. - Apply expert knowledge of **Risk Management Framework (RMF) v5** processes and workflows. - Use **eMASS** to execute RMF v5 activities, document/update system status, identify/manage operational and technical security controls, assess implementation and risk. - Manage non-compliant and non-validated controls. - Manage **POA&Ms** from entry through closeout; produce reports and track POA&M due dates. - Complete checklists to ensure Security Authorization Process documentation is complete and compliant with applicable guidance. - Collaborate with IT counterparts; communicate complex technical information to non-technical audiences. - Coordinate **STIG remediation** with system administrators and developers. - Conduct risk assessments, monitor security incidents, and respond appropriately to security threats. - Apply knowledge of network technologies and protocols (TCP/IP), operating systems, security protocols, system architecture and data flows, security categorization, configuration management, firewalls, intrusion detection/prevention, encryption, and common platforms (Windows, Unix, Linux, databases, web servers, and other applications). ### Qualifications - **Bachelor’s degree** in Computer Science, Business Management, or an IT-related discipline. - **Minimum 9 years** of experience in a Computer Science or Cybersecurity field, with **at least 7 years** as an **ISSO** or **Information System Security Engineer** at a cleared facility. - Must have **at least 1** of the following certifications: **CISSP**, **GISP**, or **CASP+/SecurityX**. - Must meet **DoD 8140.03 Advanced** proficiency aligned to **Information Systems Security Manager (Work Role 722)**. - Must have **at least 1** of the following certifications or advanced degrees: - **CISM**, **CISSP**, **CISSP-ISSMP**, **FITSP-M**, **GCIA**, **GCIH**, **GICSP**, **GSLC** - Doctorate: Computer Science / Cybersecurity / Data Science / Information Systems / Information Technology / Software Engineering - Master’s: Strategic Information and Cyberspace Studies (NDU CIC) / Computer Science / Cybersecurity / Data Science / Information Systems / Information Technology / Software Engineering - Familiarity with security tools such as **Tenable Nessus/Security Center**, **Splunk**, **IBM Guardium**, **HP Web Inspect**, **NMAP**, and similar applications. - **Active TS/SCI** clearance with ability to obtain a **polygraph**. ### Location - **Washington, DC** ### Target Salary Range - **$146,000 – $234,000** (typical range; final offer depends on factors including experience, education, location, and contract/business considerations).

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