Information Systems Security Engineer in Suitland

The Leidos Digital Group is seeking a ISSE to support a high visible fast paced program. The ISSE will be responsible for assiting with scheduling and running vulnerability scans using Tenable SecurityCenter/Nessus (ACAS) in classified and unclassified environments. Review scan results to help identify potential CAT I/II/III findings, false positives, and basic configuration issues. Identifying hardening requirements that still need to be met and apply those Security Technical Implementations (STIGs).

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Act as expert for system admins and Engineers to assit thorough the STIG hardening process.

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Support tracking of remediation actions, Plans of Action and Milestones (POA&Ms), and exceptions in accordance with RMF guidance.

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Follow established procedures to validate DISA STIG checklists and work with team members to ensure secure system configurations, n

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Help prepare basic vulnerability reports, compliance summaries, and metrics to support leadership briefings and inspection readiness (e.g., CCRI/CORA).

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Assist in maintaining asset groupings, scan zones, and credentialed scanning configurations as directed by senior analysts.

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Coordinate with Queue Managers, ISSOs, and Engineering teams to support the remediation of high-priority vulnerabilities.

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Maintain data accuracy within ACAS, including proper tagging and grouping for consistent reporting., The Cyber Engineer will be a strategic asset and will be driven to automate network security compliance., The engineer will integrate these systems to give us a single, real-time inventory of all devices that are connected to our network, even when they are off-site.

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Active DoD Secret clearance required.

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CompTIA Security+ CE or higher DoD 8570 IAT Level II certification must meet 8140 ISSM role qualification.

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BS Degree and 4-8 years of cybersecurity or system administration experience, with at least 1 year of direct ACAS or Tenable experience. Additional education and experience may be considered in lieu of a degree.

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Working knowledge of DISA STIGs, vulnerability risk levels, and POA&M remediation strategies.

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Familiarity with NIST SP 800-53, RMF compliance, and Air Force cybersecurity policy (AFMAN 17-130).

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Strong attention to detail, documentation skills, and the ability to interpret technical vulnerability data., n

Experience supporting USAF, DISA, or other DoD mission systems.

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Familiarity with EvaluateSTIG, StigViewer, OpenSCAP, Nessus/ACAS,

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Prior involvement in CCRI/CORA preparation or vulnerability remediation campaigns.

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Ability to communicate risk-based recommendations to both technical and non-technical stakeholders.

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Understanding of automation tools/scripts (e.g., PowerShell, Nessus APIs) to support scan or report optimization.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.