Information System Security Officer

Peraton; Corridor North (MD); On-site; USD 104,000 - 166,000; Full time

Job summary

Peraton is seeking an Information System Security Officer (ISSO) to support our customer onsite in Annapolis Junction, MD. This role requires TS/SCI eligibility and hands-on RMF, ATO, and continuous monitoring experience.

You will translate security requirements for engineering teams, maintain artifacts, and coordinate with ISSMs, PMs, and ISO. The position offers growth in certifications and a mission-focused environment.

Qualifications

• Active Top Secret clearance with SCI eligibility.
• 5 years with BS/BA; 3 years with MS/MA; 4 additional years of experience may be considered in lieu of degree.
• Security+ or equivalent certification (DoD 8570 IAM Level II).
• Experience with SAP assessments and authorizations.
• 3+ years experience with Authority to Operate (ATO) process, continuous monitoring, POA&Ms, Security Authorizations (SA), NIST 800-37, NIST 800-53 Rev4/ Rev5.
• Experience with SCAP, STIGs, and other compliance tools.
• Proven written and verbal communication skills, and the ability to work well with team members.

Responsibilities

• Assist the Information System Security Manager (ISSM) with information assurance efforts and systems across numerous environments.
• Perform ISSO roles and responsibilities as prescribed by the JSIG and other applicable regulations.
• Execute and maintain RMF activities (control implementation oversight, evidence collection, assessment support, POA&M management, continuous monitoring).
• Maintain security authorization artifacts (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).

Skills

Written and verbal communication

SCRUM methodologies

Experience with auditing tools

Team collaboration

Education

BS/BA

MS/MA

Tools

Splunk

ACAS

Nessus

Job description

Information System Security Officer

Job Locations: US-MD-Annapolis Junction

Requisition ID: 2026-169349

Position Category: Cyber Security

Clearance: Top Secret/SCI

Responsibilities

Peraton is seeking a ISSO to support our customer onsite in Annapolis Junction, MD.

• Assist the Information System Security Manager (ISSM) with information assurance efforts, and systems across numerous environments
• Perform Information System Security Officer (ISSO) roles and responsibilities as prescribed by the JSIG and other applicable regulations
• 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)

Qualifications

Required qualifications

• Active Top Secret clearance with SCI eligibility
• 5 years with BS/BA; 3 years with MS/MA; 4 additional years of experience may be considered in lieu of degree
• Security+ or equivalent certification (DoD 8570 IAM Level II)
• Experience with SAP assessments and authorizations
• 3+ years experience with Authority to Operate (ATO) process, continuous monitoring, POA&Ms, Security Authorizations (SA), NIST 800-37, NIST 800-53 Rev4/ Rev5, working with Information System Owners (ISO) and Program Managers (PM)
• Experience with SCAP, STIGs, and other compliance tools
• Proven written and verbal communication skills, and the ability to work well with team members

Preferred qualifications

• Experience with SCRUM methodologies
• Experience with Ongoing Authorizations
• Experience with Splunk and/or other auditing compliance tools
• Experience with ACAS, Nessus, and/or other vulnerability scanners

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

$104,000 - $166,000. 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

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