Systems Admin L3 ClearanceActive DoD SCI clearance required pre-start Location: St. Louis, MO (On-site 5 days/week) Duration: 12 months (expected) Need to be local to St. Louis and available to come on-site. Please read the security clearance requirements carefully as they are non-negotiable.ResponsibilitiesContract role supporting a secure customer environment. Candidate will be employed by a partner organization (full compensation and benefits provided prior to start). The System Administrator III provides advanced engineering, system integration, and high-level administrative support for secure Closed Area environments.
Responsibilities include designing, building, and maintaining enterprise-grade infrastructure across Windows, Linux, virtualization clusters, security controls, and automation pipelines. This role requires independent technical leadership and deep subject matter expertise.Key ResponsibilitiesResearch, develop, and implement infrastructure tools and scalable technical solutionsLead development of new processes to improve operational and project efficiencyMaintain update services for applications and infrastructureRecommend hardware architecture and enterprise software toolsManage and maintain multiple license server implementationsCreate, maintain, and support PKI infrastructure; advise on PKI-related solutionsBuild and sustain customer relationshipsImplement and uphold customer standards and industry best practicesFacilitate problem recreation and deep-level failure analysisPresent solutions to complex technical issues with business and operational impact in mindParticipate in team meetings, provide technical insight, and support consensus buildingMaintain escalation channels for critical issuesMaintain hardware infrastructure in secured lab environmentsInstall and support complex applications requiring advanced integrationCreate, follow, and review process documentation for accuracy and completenessTroubleshoot complex application, system, and integration issuesCreate and maintain Active Directory and VPN/Remote Access accountsDeploy, maintain, and troubleshoot secure Group Policy solutionsInterface with customers, vendors, and SMEs for advanced issue resolutionPerform system backups and restoresMinimum QualificationsActive DoD SCI clearance required prior to startCompTIA Security+ CE required prior to start5+ years of experience integrating, configuring, and troubleshooting enterprise technologiesExperience supporting both Windows and Linux enterprise environmentsCore Technical ExperienceWindows Server administration (Server 2019+ / Windows 10+)RHEL 8+ experience (RHEL 9 preferred)VMware ESXi 7.0+ (cluster-level): cluster configuration, vCenter management, resource pools, high availability and DRS policies, performance tuning and capacity planningAdvanced Experience WithActive Directory administrationGPO deployment and troubleshootingWSUS and SCCM for patching and complianceExperience AdministeringPKI infrastructureLicense server implementationsAdditional RequirementsAbility to lead root-cause analysis and resolve complex technical issuesAbility to develop processes and technical documentationStrong customer-facing communication skillsHighly self-directed and effective in dynamic environmentsAutomation: Required ScriptingPowerShellBashPython (preferred)Preferred QualificationsExperience with HP and Dell hardwareSCAP/STIG compliance and EvaluateSTIGServer-based antivirus and data-at-rest encryptionNessus vulnerability scanningSplunkSAN administrationNetworkerTechnical documentation writing/editingAnsible, DevOps pipelines, SCCM (advanced usage)Microsoft System Center Service Manager (SCSM)