Cyber Security Engineer DoS CSS

OneZero Solutions is an employee-centric company that builds technically proficient teams to support customer missions across cyber mission areas. The Cyber Security Engineer supports the daily operation of Tenable and Wiz vulnerability and compliance scanning platforms and serves as the program’s DevSecOps security engineer. The role deploys agents, executes scans, triages findings, and integrates security checks into CI/CD/CM pipelines while supporting authorization evidence and compliance activities.

Responsibilities:

• Operate Tenable andWiz dayto day: scan execution and scheduling, Nessus Agent deployment and health, asset onboarding, grouping and tagging per CA configuration standards, and quality review of results
• Distribute vulnerability and compliance scan results to ISSOs within 5 business days of scan completion; produce remediation tracking reports and metrics; supportiPostapplication groupings
• Participate in the on-call rotation and support platform backups, patching, and troubleshooting under direction of the Cyber Security Engineer III
• Triage vulnerability, KEV, CVE, and STIG scan results; assist ISSOs in prioritizing critical and high findings to Department and BOD timelines
• Ensure applicable pipeline securitycontrols (SAST, dependency scanning, container image scanning, and infrastructure-as-codechecks) are implemented in DevSecOps CI/CD/CM pipelines; document the controls for the SSP and capture scan reports in the Evidence Index (RMF Step 3)
• Analyze code and pipeline findings for security weaknesses and verify that mitigation strategies are validated and sustained across the system lifecycle
• Perform risk identification and IT governance assessments throughout the CI/CD/CM pipeline; brief ISSOs on pipeline risks
• Support hardened-build verification for development and production systems and ad-hoc scanning requests
• Support agent, data ingest and sharing, and pipeline integration efforts
• Maintain scanning SOPs and runbooks; provide Tenable/Wiz evidence for control demonstrations during RMF Step 4

Requirements:

• • Five (5)+ years of cybersecurity or systems engineering experience, including two (2)+ years operating Tenable, Wiz, or a comparable enterprise vulnerability management platform
• • Hands-on experience with CI/CD tooling (GitLab CI, Jenkins, Azure DevOps, or GitHub Actions) and at least one SAST/SCA or container scanning tool (e.g., SonarQube, Fortify, Snyk, Trivy, Anchore, Prisma)
• • Scripting proficiency (Python, PowerShell, or Bash) and comfort with REST APIs
• • Active, final SECRET security clearance; U.S. citizenship
• • DoD 8140/8570 IAT Level II baseline certification (e.g., Security+ CE, CySA+, GSEC) or ability to obtain within 6 months
• • Working knowledge of NIST SP 800-53 Rev. 5 vulnerability and configuration management controls (RA-5, SI-2, CM-6, SA-11)
• • Tenable (tenable.sc/Nessus/Agents) and Wiz operations; scan scheduling and results analysis
• • CI/CD security tooling: SAST, SCA/dependency scanning, container image scanning, IaC scanning (e.g., Checkov, tfsec)
• • Linux/Windows fundamentals, Git, Python/PowerShell/Bash, REST APIs
• • NIST SP 800-53 Rev. 5, SP 800-218 (SSDF), CISA KEV, STIG/CIS benchmarks
• Bachelor's degree in Computer Science, Information Technology, Cybersecurity, or a related field, or an additional four (4) years of directly relevant experience in lieu of degree
• Remote; must reside within the National Capital Region (NCR)
• Must be available during Department core hours of 9:00 a.m. – 3:00 p.m. ET, Monday – Friday, and flex working hours as needed to meet CST day-to-day and emergent requirements
• Participates in a rotating on-call schedule supporting 24x7x365 availability of the vulnerability and compliance scanning platforms
• Position requires an OpenNet account, DoS PIV badge, multifactor authentication, and adherence to DoS SBU/CUI handling requirements
• Local travel within the National Capital Region; minimal other travel
• • Tenable or Wiz certification; Certified DevSecOps Professional or equivalent
• • Experience with Kubernetes/containers, Terraform, and cloud (AWS/Azure) security
• • Department of State or other federal civilian experience; iPost familiarity
• • STIG/SCAP experience and DISA STIG Viewer proficiency