Cleared Senior Information Systems Security Engineer; ISSE L4

Opportunity

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.

• 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.

• 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 have understanding of how the tools differ when moving 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.
• 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%
• Security Clearance:
  Active Top Secret with SCI.

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

• Must be within driving distance of Lorton, VA OR willing to relocate there.
• Must be willing to work onsite.
• Must be willing and able to travel up to 10%.
• Must possess an active TS/SCI clearance or above.
• DoD 8570 Level III compliant certification is required.
• This position requires U.S. citizenship status pursuant to a government contract.

• You are an excellent communicator in writing and speaking.
• You have the ability to work independently but also value teamwork.
• Your problem‑solving skills are excellent.
• You are looking for a job where performance appraisals occur regularly, and you look forward to advancing your career.
• You seek a community of virtue‑centered co‑workers and clients.

As part of the VSO company, you will be part of a virtue‑centered team that values their work and teammates. This is a no‑jerk zone. We provide ongoing learning and development opportunities to foster continuous growth. We offer competitive salaries, health benefits, and flexible work arrangements.

VSO is a hybrid cloud and managed services consulting firm. Much of VSO’s success can be attributed to our deep partnerships with IT services industry leaders such as AWS, IBM, Microsoft and others. VSO leverages numerous other partner relationships to provide our customers with optimal support. Additionally, we take pride in taking care of our employees. We offer a wide variety of benefits for eligible employees related to health, retirement, professional development, and more!

For more information, please visit our website at