External Job Posting Title Information System Security Officer (ISSO)

Peraton; Northern (KY); Hybrid; USD 146,000 - 234,000; Full time

Job summary

Peraton Labs is seeking a poly cleared Information System Security Officer to own day-to-day security operations in a mission-critical, highly complex HPC environment. You will lead RMF, continuous monitoring, and authorization artifacts, collaborating with subcontractors and customers to ensure compliance.

This on-site role in Laurel, MD requires strong risk communication, documentation discipline, and incident response capabilities, with a potential sign-on bonus discussed during recruiting.

Qualifications

• 6+ years of experience with computer science/IT or related field.
• 4+ years of experience supporting DoD/IC or government systems.
• Hands-on RMF task execution and authorization artifacts.
• Strong knowledge of NIST SP 800-53 mappings to implementations.
• Active TS/SCI clearance with polygraph required.

Responsibilities

• Act as the ISSO across development, operations, and modernization.
• Execute and maintain RMF activities and continuous monitoring.
• Maintain SSP, control narratives, diagrams, and artifacts.
• Operate continuous monitoring: vulnerability management, config compliance, patch coordination.
• Review and approve security changes; validate configurations after upgrades.
• Support incident response and post-incident lessons learned.
• Ensure least privilege and audit compliance; account management oversight.
• Translate security requirements into testable guidance for engineering.

Skills

RMF

NIST SP 800-53

Vulnerability management

Linux

Risk communication

Documentation discipline

TS/SCI clearance

Education

B.S. in Computer Science/IT/related field

M.S. in related field

Tools

eMASS

Job description

Responsibilities

Peraton Labs is seeking a poly cleared Information System Security Officer for a mission-critical, highly complex HPC environment enabling research across multiple security domains. You will own day-to-day security operations aligned to RMF, drive continuous monitoring, maintain ATO posture, and partner closely with subcontractor and customer personnel to ensure implementation and compliance.

This position requires full-time on-site work in Laurel, MD.

Key responsibilities may include

• Act as the ISSO supporting the system security lifecycle across development, operations, and modernization
• Execute and maintain RMF activities (e.g., control implementation oversight, evidence collection, assessment support, POA&M management, continuous monitoring)
• Maintain security authorization artifacts (e.g., SSP, control narratives, diagrams, inheritance/leverage controls, CM plan, incident handling plan, contingency artifacts, user/admin procedures)
• Operate continuous monitoring: vulnerability management, config compliance, patching coordination, scan result triage, risk acceptance, and remediation verification
• Review and approve security-relevant changes through configuration/change control and validate security configurations after major upgrades
• Support incident response and reporting: participate in investigations, coordinate containment actions, preserve evidence, and contribute to post-incident lessons learned
• Ensure least privilege/access governance: account management oversight, privileged access workflows, periodic access reviews, and audit compliance requirements
• Translate security requirements into implementation guidance that engineering teams can operationalize (clear, testable, and automatable where possible)

*This position may be eligible for an increased sign-on bonus. Eligibility, bonus amount, and applicable terms and conditions will be discussed during the recruiting process*

#MDFSP

#PLABS26

Qualifications

Required qualifications

• 6+ years of experience and a BS in computer science, IT, or related technical discipline, MS and 4+ years of experience. Four years of additional experience is required in lieu of a Bachelors’ degree for a total of 10 years of experience
• 4+ years of experience supporting DoD/IC or government systems
• Hands-on experience executing RMF tasks and maintaining authorization artifacts (SSP, POA&M, continuous monitoring evidence)
• Strong working knowledge of NIST SP 800-53 controls and how they map to technical implementations and procedures
• Experience with vulnerability and configuration compliance workflows
• Familiarity with Linux-based enterprise environments and common hardening concepts
• Ability to communicate risk clearly to both technical engineers and non-technical leadership
• Strong documentation discipline
• Active TS/SCI security clearance with a current polygraph is required.

Preferred qualifications

• Experience securing or assessing containerized workflows (e.g., container runtime hardening, image governance, supply chain considerations)
• Experience with eMASS (or comparable GRC tooling), security control inheritance models, and assessor engagement.
• Familiarity with vulnerability tooling and security monitoring concepts
• Active certifications such as: CISSP, CISM, CAP, GSLC, Security+, CCSP, etc.
• Experience with data protection requirements relevant to sensitive environments

#MDPM

#MDFSP

Peraton Overview

Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world’s leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies. Peraton operates at the critical nexus between traditional and nontraditional threats across all domains: land, sea, space, air, and cyberspace. The company serves as a valued partner to essential government agencies and supports every branch of the U.S. armed forces. Each day, our employees do the can’t be done by solving the most daunting challenges facing our customers. Visit peraton.com to learn how we’re keeping people around the world safe and secure.

Target Salary Range

$146,000 - $234,000. This represents the typical salary range for this position. Salary is determined by various factors, including but not limited to, the scope and responsibilities of the position, the individual’s experience, education, knowledge, skills, and competencies, as well as geographic location and business and contract considerations. Depending on the position, employees may be eligible for overtime, shift differential, and a discretionary bonus in addition to base pay.

EEO

EEO: Equal opportunity employer, including disability and protected veterans, or other characteristics protected by law.