Wiesbaden, DEU Full-time Clearance Requirement: Secret w/ T5 Company Description Founded in 1989, SOSi is among the largest private, founder-owned technology and services integrators in the defense and government services industry. We deliver tailored solutions, tested leadership, and trusted results to enable national security missions worldwide. Job Description Overview _This position is contingent upon contract award_ SOSi is seeking a Senior Systems Engineering Support Lead (OS) in Wiesbaden, Germany. The ideal candidate will possess experience overseeing engineering, maintenance, and optimization of enterprise-level server architectures and operating systems in support of theater-level mission requirements. The role involves leading technical system efforts, ensuring data integrity, and providing high-level technical support across complex Microsoft and UNIX-based environments. Essential Job Duties Provide senior-level engineering support for the design, integration, and implementation of complex Microsoft and UNIX-based server architectures and hardware. Lead the technical planning and execution of server upgrades, resource allocation, and storage management (SAN/NAS) for theater-level data processing environments. Oversee the deployment and maintenance of virtualized environments (VMware/Hyper-V) and manage hybrid-cloud integrations to enable scalable and resilient system performance. Direct the management of Active Directory, Azure AD/Entra ID, and GPO configurations to ensure secure access control and compliance with Department of Defense (DoD) standards. Ensure the availability, integrity, and confidentiality of the Department of Defense Information Network (DoDIN) by performing advanced troubleshooting and ensuring all systems meet STIG compliance requirements. Provide situational assessments, utilization metrics, and proactive technical support to address emerging system requirements and theater-wide processing initiatives. Qualifications Minimum Requirements Active in scope Secret clearance with T5. BA/BS degree (Engineering, Computer Science, Science, Business Administration, or Mathematics) plus three (3) years of specialized experience OR Associateu2019s degree plus seven (7) years of specialized experience OR a major professional certification plus seven (7) years of specialized experience OR eleven (11) years of specialized experience. Possession of at least one of the following Microsoft certifications: Microsoft 365 Certified: Administrator Expert or Security Operations Analyst Associate; or Azure Solutions Architect Expert; or Microsoft Certified: Windows Server Hybrid Administrator Associate. The following experience may be concurrent. Minimum four (4) years of experience using and maintaining UNIX systems and/or Microsoft Server Based OS. Minimum two (2) years of experience with Microsoft Server based products, HP-UX, or Solaris. Minimum two (2) years of direct experience with U.S. military command and control or commercial LAN/WAN communication systems. Preferred Qualifications Extensive experience with VMware vSphere or Microsoft Hyper-V in a clustered enterprise environment. Advanced knowledge of Active Directory (AD), Azure AD/Entra ID, and Group Policy Object (GPO) management within a secure Department of Defense (DoD) framework. Proficiency in PowerShell, Bash, or Python for automating system administration tasks and configuration management. Experience managing and maintaining Storage Area Networks (SAN) or Network Attached Storage (NAS) solutions (e.g., NetApp, Dell EMC). Familiarity with STIG compliance and the use of ACAS for vulnerability scanning. Experience with Hybrid Cloud environments and migrating legacy on-premises workloads to Azure Government or AWS GovCloud. Prior experience supporting theater-level network operations centers. Additional Information Work Environment Normal office conditions with potential to perform duties in deployed locations. May be requested to work evenings and weekends to meet program and contract needs. Working at SOSi All interested individuals will receive consideration and will not be discriminated against for any reason. SOSi is an equal employment opportunity employer and affirmative action employer. All interested individuals will receive consideration and will not be discriminated against on the basis of race, color, religion, sex, national origin, disability, age, sexual orientation, gender identity, genetic information, or protected veteran status. SOSi takes affirmative action in support of its policy to advance diversity and inclusion of individuals who are minorities, women, protected veterans, and individuals with disabilities.