Sr. Information Systems Security Engineer (ISSE) L4 Lead

About

Are you looking to take the next steps in your career as an Information Systems Security Engineer (ISSE)? Let's chat and see if we are a good match.

We are building a team of highly qualified professionals specializing in Cybersecurity, Cloud, and Systems Engineering to support the development and sustainment of secure enclaves at the edge. You’ll deliver enterprise services and cyber network defense capabilities.

As a Senior Information System Security Engineer (ISSE), you will provide expert engineering support to ensure the confidentiality, integrity, and availability of mission‑critical systems. You will perform technical security assessments, design secure solutions, automate reporting, and guide leadership on cybersecurity risks, vulnerabilities, and mitigation strategies.

You will work with technologies such as ePO, Splunk, ACAS, Azure Automation, STIG/SCAP, Active Directory, and Azure security services to secure enterprise environments in alignment with DoD cybersecurity policies and standards.

Responsibilities

• Perform and review technical security assessments of computing environments to identify vulnerabilities, compliance gaps, and recommend mitigations.
• Architect and engineer innovative solutions to support ongoing Cyber Threat and Defensive Operations.
• Provide functional expertise and technical recommendations to ISSOs, ISSEs, and ISSMs.
• Automate threat assessment, posture reporting, and system monitoring activities.
• Analyze system and organizational security posture trends and report findings to the ISSM/ISSO.
• Recommend cybersecurity measures based on significant threats and vulnerabilities.
• Implement security controls in alignment with confidentiality, integrity, availability, authentication, and non‑repudiation principles.
• Develop and recommend modifications based on exercise or test results.
• Mitigate or recommend acceptance of identified risks and deficiencies during certification, testing, or operational reviews.
• Act as a technical lead and mentor to engineers at all levels to elevate team capacity and performance.
• Lead by example through high‑quality engineering excellence.

Required Qualifications

• Certification: IAT/IAM/IASAE Level III (DoD 8570 compliant).
• Technical Expertise: Advanced skills in all of the following areas:
  • Active Directory (AD DS, ADFS, AD CS, WSUS)
  • ePO, Splunk, STIG/SCAP, YUM, ACAS automation
  • Azure VPN Gateways, Azure Monitor/Log Analytics
  • SAP systems security
  • GPOs
  • SQL Server STIG hardening
• Must have proven, day‑one depth of knowledge across ePO, ACAS, and Splunk.
• Must be able to build systems from scratch.
• Must have troubleshooting experience with deployment and maintenance.
• Must understand how the tools differ when they move to hyperscale.
• Must be able to lead, guide and mentor other Information System Security Engineers.
• Must have network compliance regulations knowledge.
• Must have experience with compliance & frameworks (NIST, JSIG/RMF, SCTM).
• Must have experience with hyperscale, architecture and integration.
• Must have automation & reporting experience.
• Must be able to continuously improve processes and team velocity.
• Must be able to communicate complex security concepts to non‑technical stakeholders.

Experience

• 8–12 years of demonstrated performance in related technology areas.

Education

• Bachelor’s degree in Computer Science, Engineering, or related field and 3+ years of leadership experience.
• OR equivalent professional experience.

Travel

• Up to 10% travel required.

Security Clearance

• Active Top Secret with SCI.

Preferred Qualifications

• 5+ years leadership experience in a related technical or cybersecurity area.
• Technical certifications in Microsoft Azure or related cloud technologies.

Additional Requirements

• Must be within driving distance of Lorton, VA or willing to relocate there.
• Must be willing to work onsite.
• Must possess an active TS/SCI clearance or above.
• Must be a U.S. citizen (government contract requirement).
• DoD 8570 Level III compliant certification is required.

What Is Important to Us

• Excellent communicator in writing and speaking.
• Ability to work independently while valuing teamwork.
• Strong problem‑solving skills.
• Desire for regular performance appraisals and career advancement.
• Seeking a community of virtue‑centered co‑workers and clients.