Cyber Security Engineer III

The Cyber Security Engineer III is the dedicated, full-time Tenable platform lead. The engineer owns engineering, operations, and maintenance of the CA Tenable vulnerability and compliance scanning platform used to assess on-premises consular systems (platform integrations, troubleshooting, backups, patching, user access, dashboard development, plugin updates, scan template design, and scan scheduling) and sustains 24x7x365 platform availability. The engineer also leads ad-hoc and BOD-driven scanning and agent deployment and integration efforts., * Serve as the dedicated, full-time Tenable subject matter expert; maintain 24x7x365 platform availability and lead the on-call rotation.

• Administer the Tenable platform end toend:integrations, troubleshooting, backups, patching and version upgrades, user access and role management, plugin and feed updates.
• Design and maintain scan templates, policies, and schedules to ensure requiredcoverage: weeklyservers, monthly workstations, and any additional cadence required by Binding Operational Directives (RMF Step 6).
• Perform ad-hoc and BOD-specific scans on request to confirm hardened server builds for developers, production applications, and appliances.
• Ensure all in-scope assets are onboarded, grouped, and tagged in Tenable in accordance with CA configuration standards; support CA iPost application groupings and asset inventory accuracy.
• Develop dashboards, reports, and metrics for the ISSM, AO, ISSOs, and other stakeholders, including KEV, CVE, and STIG compliance reporting.
• Lead Nessus Agent deployment, data ingest and sharing, pipeline, and other integration efforts.
• Deliver vulnerability and compliance scan results to ISSOs within timelines and to the assessment team during RMF Step 4.
• Coordinate logistics for Red Cell penetration testing and Blue Team cyber hygiene scans; support hardened-build verification.
• Document platform architecture, SOPs, and configuration baselines; provide Tenable evidence for the Evidence Index and SSPs.
• Mentor the Cyber Security Engineer on platform operations and serve as escalation point for scanning issues.

• Seven (7)+ years of cybersecurity or systems engineering experience, including four (4)+ years administering Tenable (Tenable Security Center / tenable.sc, Nessus, Nessus Agents, Tenable One / Vulnerability Management) at enterprise scale.
• Strong Linux and Windows administration skills and scripting proficiency (Python, PowerShell, or Bash) including use of REST APIs for automation and reporting.
• Experience with STIG/SCAP compliance scanning and audit files.
• Active, final SECRET security clearance; U.S. citizenship.
• DoD 8140/8570 IAT Level III baseline certification (e.g., CISSP, CASP+, GCIH, GCED) or IAT Level II with ability to obtain Level III within 6 months.
• Experience supporting a 24x7 on-call rotation for a production security platform., * Tenable certifications (Tenable Security Center Specialist, Nessus Specialist, Tenable One).
• Department of State experience, including iPost integration; DoD ACAS experience.
• Experience with Wiz or another CNAPP for cloud scanning; SIEM (Splunk) integration.
• Experience with CISA BOD 22-01 (KEV) and BOD 23-01 asset visibility reporting.

Technical Skills

• Tenable Security Center / tenable.sc, Nessus Manager and Scanners, Nessus Agents, Tenable One; plugin/feed management; scan policy and credentialed-scan design.
• SCAP/STIG benchmarks, DISA STIG Viewer, CIS benchmarks.
• Linux (RHEL) and Windows Server administration; Python/PowerShell/Bash; Tenable REST API.
• Dashboards and reporting; ticketing (ServiceNow or equivalent); SIEM integration.

Education

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/Hybrid/On-site and any other relevant work-environment requirement

Remote. Duties are performed remotely; the selected candidate must reside within the National Capital Region (NCR). The Government does not furnish equipment; OneZero provides the laptop and collaboration tools. 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.

We are an employee-centric company that truly values our team members and the contributions they make to our customers and the missions they support. We pride ourselves on being forward-leaning thinkers and on building teams that are, and continue to be, technically proficient across a broad range of cyber mission areas. OneZero full-time employees receive a highly competitive benefits package, including health, dental, vision, and life insurance, a 401(k) with company matching, paid time off and holidays, an employee referral program, and educational assistance. Additional details are available on our website