Defense - Senior Information Systems Security Officer- Cloud

Tetrad Digital Integrity LLC•Arlington, VA

3d•$130,000 - $160,000•Remote

About The Position

Tetrad Digital Integrity (TDI) is seeking a hands-on Information Systems Security Officer (ISSO) to support U.S. Marine Corps cloud modernization in a fully remote role. You’ll help application teams securely onboard mission-critical workloads to modern cloud environments while supporting ATO efforts and translating RMF, NIST SP 800-53, and Cloud SRG requirements into actionable security deliverables. This is a fully remote position supporting mission-critical U.S. Marine Corps programs. An active Secret clearance is required.

Requirements

Active Secret security clearance.
A current Certified Information Systems Security Professional (CISSP) or Certified Information Security Manager (CISM) certification is required.
Bachelor’s degree in Cybersecurity, Computer Science, or Information Technology, and 8+ years of cybersecurity experience, including demonstrated experience supporting Risk Management Framework (RMF) activities for Department of War (DoW) systems.
Candidates must have practical, hands-on experience with at least one cloud platform, including AWS, Microsoft Azure, or Google Cloud Platform (GCP), with demonstrated experience in IAM, VPC/networking, Kubernetes, and cloud security services.
Strong knowledge of containerized environments (e.g., Docker, Kubernetes) and container security best practices.
Familiarity with Generative AI technologies, including LLMs and AI/ML security considerations.
Deep understanding of NIST SP 800-53, DoD RMF, FedRAMP, and other relevant cybersecurity frameworks.
Experience writing and maintaining RMF artifacts such as SSPs, POA&Ms, and SARs.
Strong communication skills and ability to collaborate effectively with technical and non-technical stakeholders.
Experience with security risk assessments in DoW environments

Nice To Haves

Advanced cloud security certifications, such as Google Professional Cloud Security Engineer, Cloud Certified Security Professional or Azure equivalent.
Experience integrating DevSecOps pipelines with RMF compliance processes.
Familiarity with automation tools for RMF documentation and control testing (e.g., Xacta, eMASS, OpenRMF).

Responsibilities

Lead and support RMF activities throughout all phases (categorization, control selection, implementation, assessment, authorization, and continuous monitoring).
Provide expert guidance on DoW cloud security policies, NIST SP 800-53 controls, CNSS policies, and DoD-specific frameworks such as Cloud Computing SRG and AI-specific guidance.
Conduct security architecture reviews and security engineering analysis for cloud-native and containerized workloads hosted in Azure.
Evaluate security controls associated with Kubernetes, Docker, and container orchestration platforms within Azure.
Assess security risks related to generative AI components, including large language models (LLMs) and AI/ML workloads, ensuring responsible and compliant use.
Develop and maintain System Security Plans (SSPs), Security Assessment Reports (SARs), Plan of Action and Milestones (POA&Ms), and related RMF documentation.
Perform threat modeling, vulnerability assessments, and risk analysis tailored to cloud environments and AI technologies.
Interface with system architects, developers, and DevSecOps teams to integrate security throughout the Software Development Lifecycle (SDLC).
Support security control assessments (SCAs) and coordinate with third-party assessors.
Monitor, track, and report on security compliance posture through Continuous Monitoring (ConMon) processes.