Information Systems Security Officer (ISSO)

Job ID: 8738 Date Posted: July 15, 2026 Space Dynamics Laboratory (SDL) is seeking a highly experienced Information Systems Security Officer (ISSO) to support and secure mission-critical systems within the intelligence community. This position requires a strong background in TS/SCI environments, and advanced cybersecurity practices supporting highly sensitive national security missions. The ideal candidate has 5+ years of experience in cybersecurity, risk management, and information system security within classified environments. Key Responsibilities: Security Compliance & Risk Management * Ensures information systems comply with Intelligence Community Directives (ICDs), CNSSI, NIST 800-53, and the Risk Management Framework (RMF) for TS/SCI systems * Conducts risk assessments, vulnerability management, and mitigation planning for highly classified systems * Performs audits of log review, reduction, and analysis using Splunk to support security monitoring and investigations * Leads and executes the full Risk Management Framework (RMF) lifecycle to achieve and maintain an Authorization to Operate (ATO) for TS/SCI systems Incident Response & Continuous Monitoring * Oversees security operations, threat analysis, and intrusion detection in TS/SCI enclaves * Develops and executes incident response plans, including data spill response and containment in classified environments * Performs and manages Continuous Monitoring (CONMON) activities, including analysis of security posture, tracking of vulnerabilities, and reporting to support ongoing authorization * Executes vulnerability scanning using tenable tools (e.g., ACAS) and analyze results to identify, prioritize, and remediate system vulnerabilities Policy Development & Documentation * Develops and maintains security policies, procedures, and guidelines in alignment with IC, and national-level security requirements * Ensures audit readiness and proper documentation of security controls, artifacts, and assessment evidence * Manages and maintains RMF documentation including SSPs, POA&Ms, SARs, and security control traceability Collaboration & Leadership * Works closely with program managers, ISSMs, ISSEs, system administrators, and engineers to ensure secure system design and operation * Serves as a trusted advisor to leadership on IC cybersecurity requirements, emerging threats, and risk posture * Interfaces with Government stakeholders including Authorizing Officials (AOs), Security Control Assessors (SCAs), and IC oversight teams Required Qualifications:

• Active TS/SCI clearance
• 5-10 years of experience in information systems security within IC or other

highly classified environments * DoW 8570/8140 compliant – IAT Level II and IAM Level II (or higher) required at time of hire * Bachelor’s degree in cybersecurity, computer science, information assurance, or a related field (or equivalent experience)

• Certifications: Security+, CySA+, GSEC, SSCP, CCSP or equivalent
• Extensive knowledge of IC and DoW security frameworks: ICDs, CNSSI, NIST

800-53, RMF, JSIG, and SAP security controls * Experience with security documentation including SSPs, POA&Ms, SARs, ISAs, MOUs, and ATO packages * Experience supporting SCI systems, including accreditation and lifecycle management * Experience executing Incident Response Plans, including classified data spillage remediation * Hands-on experience with Continuous Monitoring (CONMON) activities and reporting * Experience using Tenable tools (ACAS) for vulnerability scanning and remediation tracking

• Experience using Splunk for log analysis and security monitoring
• Ability to produce detailed technical reports for system owners and

stakeholders * Strong technical background in vulnerability management, system hardening, and secure architecture Preferred Qualifications:

• Master’s degree in cybersecurity, computer science, or a related field
• Certifications: CISSP, CISM, CISA, CGRC, CASP+, or equivalent
• Experience with JSIG, ICD 503, and RMF processes
• Familiarity with Service Now (SNOW), eMASS, XACTA, and/or other IC

authorization tools * Deep understanding of multi-enclave architectures, cross-domain solutions, and classified network segmentation

• Experience with interconnection agreements (ISA/MOU/MOA) in IC environments
• Ability to assess and articulate risk for non-implemented or inherited

controls * Strong understanding of network protocols, system architectures, and secure configurations in TS/SCI environments * Ability to translate technical security concepts into mission-relevant risk language for leadership * Experience working across multi-disciplinary teams including developers, engineers, and system administrators * Demonstrated ability to work independently with minimal supervision in high-security environments

• Salary Range
• $94,000 - $160,000
• Salary commensurate on education and relevant experience

This range serves as a general guideline and may vary based on factors such as role, level, location, market conditions, and individual qualifications, including job-related skills, experience, and relevant education or training. The range displayed in the job advertisement reflects the minimum and maximum target salaries across all US locations. Specific salary details for a candidate’s preferred location can be provided by the recruiter or HR manager during the hiring process. SDL delivers advanced multi-domain solutions to protect national security and enable scientific discovery. Our expertise in satellites, sensors and instruments, ground systems and data processing, and autonomous systems plays a critical role in missions supporting NASA and the Department of Defense. Join our team of engineers, scientists, technicians, and business professionals in our seventh decade of delivering mission success. At SDL, we strive to uphold a culture of respect, collaboration, empowerment, and accountability. We listen with open minds, seek to understand diverse perspectives, and engage in thoughtful dialogue. We work together by sharing knowledge, involving others, and offering support. We trust and empower our team members to take ownership, act with integrity, and be accountable. Above all, we deliver on our commitments to each other and to our mission partners. The application window for this position is expected to remain open for approximately 7 days however, it may be shortened or extended depending on business needs and the availability of qualified candidates. We encourage interested candidates to submit their applications promptly. For questions, assistance, or accommodation with the application process or the DoD SkillBridge program, please contact View email address on click.appcast.io.