SCCM​/Windows Systems Administrator

Leidos Digital Modernization is seeking a skilled SCCM/Windows Systems Administrator to support the Defense Intelligence Agency (DIA) National Digital Exploitation & OSINT Center (NDOC) IT Operations and Maintenance (O&M) program. This mission‑critical role provides engineering and operational support to Windows server environments across connected and disconnected networks. The Windows Engineer will design, maintain, and secure Windows platforms while ensuring patch deployment and lifecycle management in bandwidth‑constrained, isolated, and edge environments.

• Engineer, implement, and maintain Windows server environments supporting NMEC operations, including edge and disconnected networks.
• Plan and execute Windows security patch deployment and updates across isolated environments, ensuring compliance with DoD and DIA security standards.
• Support VMware‑based virtualization platforms, including provisioning, upgrades, migrations, and lifecycle management.
• Troubleshoot complex Windows and VMware issues impacting availability, performance, or security.
• Develop, maintain, and update technical documentation (as‑built diagrams, runbooks, patch management procedures, compliance records).
• Collaborate with cybersecurity teams to ensure RMF (Risk Management Framework) compliance and zero‑trust principles across Windows infrastructure.
• Contribute to operational efficiency by leveraging automation (Power Shell scripting, WSUS, SCCM/Configuration Manager).
• Provide Tier II/III engineering support to O&M operations, including on‑call and surge support as mission requires.
• Manage and support Public Key Infrastructure (PKI) services, including certificate issuance, renewal, revocation, and troubleshooting for Windows servers, applications, and user authentication mechanisms.
• Partner with system engineers and program leadership to design resilient architectures for degraded, denied, or intermittent environments.

• Demonstrated expertise in Windows server administration, patching, and lifecycle management in enterprise or disconnected/edge environments.
• 5+ years of hands‑on VMware experience supporting Windows infrastructure (vSphere 6.7/7.0+).
• Proficiency with Power Shell scripting and Windows automation for patching, reporting, and compliance.
• Experience authoring and maintaining system documentation (runbooks, SOPs, as‑built).
• Understanding of RMF, STIGs, and DoD IA compliance requirements.
• Knowledge of PKI concepts, including certificate enrollment, revocation, CRLs, OCSP, TLS/SSL certificates, and certificate‑based authentication in enterprise Windows environments.
• Candidate must, at a minimum, meet DoD 8570.11‑IAT Level II certification requirements (currently Security+ CE, CCNA‑Security, GSEC, or SSCP along with an appropriate computing environment (CE) certification).

• Bachelor’s degree in Computer Science, Information Technology, or related field, with 5+ years of relevant Windows engineering experience (additional experience may substitute for degree).

• Active TS/SCI clearance with Polygraph required OR active TS/SCI and willingness to get a Poly.
• US Citizenship is required due to the nature of the government contracts we support.

• Prior experience supporting DIA, NGA, or NMEC environments.
• Familiarity with SCCM, WSUS, and automated patch deployment in disconnected/air‑gapped environments.
• Industry certifications such as Microsoft Certified:
  Windows Server Hybrid Administrator Associate, VMware Certified Professional (VCP), or equivalent.

Knowledge of containerized workloads, high‑availability clusters, and cross‑domain solutions.

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.