Senior Information System Security Officer

Peraton; United States; On-site; USD 135,000 - 216,000; Full time

Job summary

Peraton is seeking a Senior ISSO to support our customer onsite in Annapolis Junction, MD. The role leads RMF activities, mentors junior ISSOs, and coordinates ATO/reauthorization for complex systems.

You will work across development, operations, and modernization, driving security engineering outcomes, producing SSPs and POA&Ms, and briefing senior leadership on risk trends and authorization readiness. Active TS/SCI clearance required.

Qualifications

• Requires active Top Secret clearance with SCI eligibility.
• BS/BA with 12+ years or MS/MA with 10+ years (or 4 additional years in lieu).
• 8+ years of information security/compliance experience supporting DoD/IC or government systems.
• Proven leadership coordinating across security, engineering, and customer stakeholders.
• Experience writing risk decisions and RMF deliverables that withstand assessor/AO review.
• Deep understanding of continuous monitoring at scale and RMF tasks.

Responsibilities

• Lead or co-lead ATO/reauthorization efforts for complex boundary systems.
• Mentor junior ISSOs and shape security operations playbooks.
• Perform risk analysis and author formal recommendations to leadership.
• Drive security engineering outcomes by partnering with internal teams on scalable compliance patterns.
• Brief senior internal and customer stakeholders on security posture and remediation progress.
• Act as Senior ISSO supporting the system security lifecycle across development, operations, and modernization.
• Execute RMF activities: control implementation oversight, evidence, POA&M, and continuous monitoring.
• Maintain security artifacts (SSP, control narratives, diagrams, etc.).
• Operate continuous monitoring: vulnerability management, config compliance, patching, scan triage, and remediation verification.
• Review and approve security changes through change control and validate configurations after upgrades.
• Support incident response and post-incident lessons learned.
• Ensure least privilege governance and periodic access reviews.

Skills

Leadership

Mentorship

Risk communication

RMF knowledge

Education

BS/BA in a relevant field

MS/MA in a related field

Tools

Splunk

ACAS

Nessus

Job description

Responsibilities

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

Key responsibilities include:

• Lead or co-lead ATO/reauthorization efforts for complex boundary systems
• Mentor junior ISSOs and shape security operations playbooks
• Perform risk analysis and author formal recommendations to leadership
• Drive security engineering outcomes by partnering with internal teams on scalable compliance patterns
• Brief senior internal and customer stakeholders on security posture, systemic risk trends, remediation burn-down, and authorization readiness
• Act as the Senior 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)

Qualifications

Required Qualifications

• Requires active Top Secret clearance with SCI eligibility
• Min 12 years with BS/BA, Min 10 years with MS/MA; may consider 4 additional years experience in lieu of BS degree.
• 8+ years of experience in information security/compliance supporting DOD/IC or government systems, including ownership of major RMF deliverables and ATO events for complex systems
• Demonstrated leadership experience coordinating across security, engineering, and customer stakeholders
• Ability to provide mentorship and direction to team members
• Proven ability to write risk decisions and packages that stand up to assessor/AO scrutiny
• Deep understanding of continuous monitoring at scale (recurring evidence, metrics, audit readiness, remediation governance)
• 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
• Ability to communicate risk clearly to both technical engineers and non-technical leadership
• One or more active/current certifications such as: CISSP, CISM, SecurityX, Security+, and etc.

Preferred Qualifications

• Experience with SAP assessments and authorizations
• Experience securing or assessing different platforms (applications, databases, operating systems, hardware, and etc )
• Experience with SCRUM methodologies
• Experience with Splunk and/or other auditing compliance tools.
• Experience with ACAS, Nessus, and/or other vulnerability scanners
• Experience with data protection requirements relevant to sensitive environments

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

$135,000 - $216,000. 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.

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