Information System Security Manager (ISSM) – TS/SCI

SBS • Arlington, VA

23d • Onsite

About The Position

SBS is seeking an experienced Information System Security Manager (ISSM) to lead cybersecurity, Risk Management Framework (RMF), and authorization activities supporting Amazon Web Services (AWS) Federal customers operating within highly secure and classified cloud environments. The ISSM will provide overall security leadership and governance for assigned information systems and cloud environments, ensuring compliance with DoD, Intelligence Community, NIST, and customer cybersecurity requirements. This individual will oversee the development and maintenance of Authorization to Operate (ATO) packages, continuous monitoring programs, vulnerability and risk management activities, and security control implementation across multiple security domains. The ISSM will serve as a primary cybersecurity interface between customer security leadership, Authorizing Officials and their representatives, ISSOs, ISSEs, cloud engineers, architects, and program leadership. The ideal candidate combines deep knowledge of RMF and NIST SP 800-53 with experience securing AWS cloud environments and has demonstrated the ability to lead systems through initial authorization and ongoing continuous monitoring.

Requirements

• Active TS/SCI security clearance.
• 7+ years of Information Assurance, Cybersecurity, Information System Security, or related experience.
• 3+ years supporting RMF and NIST SP 800-53 within DoD, Intelligence Community, or Federal environments.
• Previous experience serving as an ISSM, senior ISSO, Information System Security Engineer (ISSE), or equivalent cybersecurity lead.
• Demonstrated experience leading systems through the RMF authorization process and obtaining/maintaining ATOs.
• Experience developing and reviewing complete authorization packages including SSPs, POA&Ms, security controls, risk assessments, and continuous monitoring documentation.
• Experience managing or providing security oversight for AWS cloud environments.
• Strong knowledge of NIST SP 800-53 security controls and RMF requirements.
• Experience with vulnerability management, security assessments, and compliance activities.
• Ability to work directly with technical engineering teams and customer cybersecurity leadership.
• Strong written and verbal communication skills.

Nice To Haves

• Experience supporting DoD or Intelligence Community classified cloud environments.
• Experience with AWS environments supporting IL4, IL5, Secret, or Top Secret workloads.
• Experience with eMASS, Xacta, Keyhole, or equivalent GRC platforms.
• Familiarity with AWS Landing Zone Accelerator (LZA).
• Experience implementing Zero Trust security principles.
• Experience integrating cybersecurity requirements into DevSecOps and Infrastructure-as-Code environments.
• Experience with automated security compliance and continuous monitoring.
• Knowledge of DISA STIGs and the DoD Cloud Computing SRG.
• DoD 8570/8140 IAM Level III or equivalent certification.
• One or more of the following certifications is strongly preferred: CISSP, CISM, CAP / CGRC, CASP+ / SecurityX, CCSP, AWS Certified Security – Specialty.
• Strong leadership and cybersecurity program-management capabilities.
• Excellent technical writing and documentation skills.
• Ability to communicate cybersecurity risk to technical teams, program leadership, and government customers.
• Strong analytical, troubleshooting, and risk-management skills.
• Ability to operate independently within classified environments.
• Experience supporting highly regulated DoD, Intelligence Community, or Federal customers.
• Ability to balance mission requirements with cybersecurity and compliance requirements.

Responsibilities

• Serve as the primary ISSM for assigned information systems and AWS cloud environments.
• Provide cybersecurity leadership, governance, and oversight throughout the system lifecycle.
• Lead and mentor ISSOs and coordinate activities across security, engineering, architecture, and operations teams.
• Establish and maintain system cybersecurity policies, procedures, and security documentation.
• Advise program leadership and customer stakeholders regarding cybersecurity risk, compliance status, and authorization strategy.
• Ensure security requirements are incorporated into system architecture, engineering, deployment, and operations.
• Lead the complete RMF lifecycle in accordance with DoDI 8510.01, NIST SP 800-37, and NIST SP 800-53 Rev. 5.
• Develop and manage strategies for obtaining and maintaining IATTs and ATOs.
• Oversee development and maintenance of: System Security Plans (SSPs), Security Control Family Plans, Security Assessment documentation, Control Implementation Statements, Plans of Action & Milestones (POA&Ms), Continuous Monitoring documentation, Risk assessments and authorization artifacts.
• Coordinate security control assessments and authorization reviews with customer security organizations and Authorizing Officials.
• Track authorization conditions, findings, vulnerabilities, and POA&M items through closure.
• Maintain system authorization packages within eMASS, Xacta, Keyhole, or equivalent GRC platforms.
• Provide security oversight for AWS environments supporting IL2, IL4, Secret, and Top Secret workloads.
• Assess AWS cloud architectures against applicable NIST and DoD security controls.
• Partner with cloud architects and engineers to implement secure AWS architectures and services.
• Provide oversight and guidance for AWS-native security capabilities including: AWS Security Hub, Amazon GuardDuty, AWS Config, AWS Identity and Access Management (IAM), AWS CloudTrail, AWS Organizations Service Control Policies (SCPs), AWS Key Management Service (KMS).
• Review proposed architecture and system changes for cybersecurity and authorization impacts.
• Support implementation of security controls within AWS Landing Zones and multi-account environments.
• Develop and oversee system Continuous Monitoring (ConMon) strategies.
• Review vulnerability assessments, security scans, and compliance findings.
• Establish priorities and timelines for vulnerability remediation based on mission and security risk.
• Oversee POA&M development, management, and closure.
• Coordinate remediation activities with engineering and operations teams.
• Monitor security posture using AWS-native and third-party security platforms.
• Support security tools and environments including: ACAS, Palo Alto, Elastic, AWS Security Hub, AWS Config, GuardDuty.
• Ensure required vulnerability, configuration, and compliance reporting is completed accurately and on schedule.
• Ensure systems remain compliant with applicable: DoD cybersecurity requirements, NIST SP 800-53, DISA STIGs, DoD Cloud Computing Security Requirements Guide (SRG), Customer-specific security policies.
• Support cybersecurity inspections, audits, assessments, and authorization activities.
• Identify security risks and provide mitigation recommendations to program and customer leadership.
• Review significant system changes and determine potential impacts to system authorization.
• Promote automation of security controls, evidence collection, compliance monitoring, and reporting where practical.
• Partner with customer security leadership, Authorizing Officials, SCA teams, ISSOs, ISSEs, cloud architects, DevSecOps engineers, and program management.
• Provide cybersecurity guidance throughout system design and implementation.
• Participate in technical and architecture reviews.
• Communicate cybersecurity risks and compliance issues to both technical and non-technical stakeholders.
• Provide leadership during security assessments, audits, and authorization reviews.

Benefits

• Comprehensive medical, dental, and vision coverage; HSA-eligible plan options available
• 401(k) retirement plan with company match (vesting schedule per Plan Document)
• Paid Time Off, federal holidays, and floating holiday for personal observance
• Annual professional development support for AWS certifications, training, and conferences
• Employee referral program where applicable and documented by program policy
• Life, AD&D, and short- / long-term disability insurance
• Telework and flexible-schedule support where mission and contract permit

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed