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Information Systems Security Engineer (ISSE)

United States, Washington · Job Posted April 24, 2026
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Job Description

The Information Systems Security Engineer (ISSE) is responsible for designing, developing, and implementing secure information systems in compliance with organizational policies, client requirements, and federal cybersecurity standards. The ISSE integrates security into every phase of the system development lifecycle (SDLC), ensuring confidentiality, integrity, and availability are preserved throughout system design, deployment, and sustainment. As a key member of the Cybersecurity Operations Team, the ISSE works closely with system owners, architects, engineers, developers, and assessors to translate security requirements into technical solutions, mitigate risks, and implement effective security controls. The ISSE provides subject matter expertise in system security architecture, secure integration, regulatory frameworks (RMF, NIST CSF, FedRAMP, DoD), and the configuration of security technologies.

Job Responsibility

  • Developing and integrating security engineering solutions throughout the SDLC
  • Ensuring security is incorporated into requirements, design, implementation, testing, and maintenance
  • Applying secure design principles such as defense-in-depth and least privilege
  • Collaborating with architects to align system security architecture with mission needs
  • Identifying and translating cybersecurity requirements into technical specifications
  • Interpreting security requirements from NIST SP 800-53, CNSSI 1253, and related standards
  • Converting organizational policies and federal regulations into actionable technical requirements
  • Balancing security requirements with operational and mission objectives
  • Conducting system-level risk assessments and supporting vulnerability management
  • Performing risk analyses, threat modeling, and vulnerability assessments
  • Recommending and documenting mitigation strategies for identified risks
  • Contributing to continuous monitoring activities by reviewing system risk posture
  • Conducting static and Dynamic code review when necessary
  • Analysis of scripts as necessary
  • Developing and maintaining security documentation to support authorization activities
  • Drafting and updating SSPPs, Risk Assessment Reports (RARs), SARs, and related artifacts
  • Supporting preparation of documentation for ATOs or equivalent authorizations
  • Ensuring documentation reflects current system architecture and controls
  • Collaborating with stakeholders to guide secure design and system authorization
  • Coordinating with ISSOs, ISOs, developers, and assessors throughout security testing and evaluation
  • Providing security engineering input to development and integration teams
  • Supporting compliance with RMF and authorization processes to maintain ATO status
  • Implementing and supporting cybersecurity tools and technologies
  • Assisting with the configuration and management of tools such as SIEMs, endpoint protection, firewalls, and vulnerability scanners
  • Analyzing security tool outputs to identify anomalies and potential threats
  • Recommending improvements in tool integration and effectiveness
  • Providing technical expertise during incident response activities
  • Supporting investigations by analyzing system architecture and configurations
  • Assisting in implementing corrective actions to address vulnerabilities and prevent recurrence

Requirements

  • Master's degree in information technology, cybersecurity, data science, information systems, or computer science, from an ABET accredited or CAE designated institution
  • Education Equivalency: One-and-one- half (1.5) years of additional experience can substitute for one (1) year of a typical degree program
  • Minimum 10 years of experience in Information Technology (IT) / Information Security (IS)
  • At least one (1) DoD 8140 certification for their respective area or the ability to obtain certification within six (6) months of onboarding
  • Active Top Secret security clearance

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