Systems Engineer 3 - Linux/VMware Systems Architecture Jobs

Systems Engineer Level 3NineFX is seeking a Systems Engineer Level 3 to lead senior-level systems engineering, technical planning, and infrastructure operations across highly complex enterprise environments. This role supports full lifecycle engineering—from requirements analysis and architectural development to integration, verification, validation, and accreditation—while also delivering expert-level hands-on support for Red Hat Linux, VMware virtualization, Splunk, and Ansible automation. The engineer drives mission-critical modernization, maintains system integrity across multi-platform infrastructures, and provides authoritative technical direction in high-security DoD/IC environments.Key ResponsibilitiesLinux, Virtualization, and Infrastructure EngineeringConfigure, harden, manage, and troubleshoot Red Hat Linux operating systemsInstall and load OS software, validate configurations, and maintain system integrityConfigure and support network components and implement OS-level enhancements to improve reliability and performanceProvide senior operational support for the troubleshooting and maintenance of complex IT systemsOptimize system resource utilization; conduct capacity analysis and planningResolve dispatch system issues and hardware problems throughout system lifecycleVirtualization & AutomationDeliver extensive hands-on engineering support for VMware platforms, including configuration, optimization, and lifecycle sustainmentUse Splunk and Ansible to enhance monitoring, orchestration, automation, configuration consistency, and system observabilitySystems Engineering & Architecture LeadershipAnalyze user requirements, CONOPS, and architectures; develop detailed system requirements and specificationsLead systems engineering activities and ensure alignment with DoDAF and SOA architectural frameworksDevelop technical documentation including SEPs, requirements specifications, ICDs, and design artifactsProvide technical direction for system development, engineering, interfacing, integration, and testing across hardware and software domainsEvaluate design alternatives and support integration of new technologies into existing mission operationsConduct feasibility studies, trade analyses, and modeling/simulationVerification, Validation & Lifecycle ManagementDefine evaluation criteria and verification methods for system and subsystem testingPrepare or assess integration/test plans supporting DoD and Government accreditation activitiesMaintain configuration control and technical baselines throughout system lifecycleAssess system risks, determine impacts, and assist with mitigation planningArchitecture, Interfaces & Operational ViewsImplement operational, system, and technical views aligned with DoDAF standardsCapture and maintain interface designs in standardized repositoriesSupport development of operational concepts, end-to-end flow analysis, and architectural modernizationInformation Assurance & Security EngineeringDevelop derived IA requirements including confidentiality, integrity, non-repudiation, and availabilitySupport authentication, access control, accountability, and cryptographic solutionsEnsure system security and IA alignment throughout engineering and operational activitiesQualifications RequiredActive TS/SCI with Full Scope Polygraph (must already be held)20 years of systems engineering experience supporting DoD or Government programsBachelor's degree in Systems Engineering, CS, IS, Engineering Management, or related discipline – Five additional years may substitute for degreeExpertise with Red Hat Linux, VMware, Splunk, and AnsibleExperience leading SE planning, documentation, integration, and architectural developmentStrong understanding of DoDAF/SOA architectures and system-of-systems integrationAbility to manage system requirements and derived requirements throughout lifecycleExcellent communication skills with senior executives and government personnelPreferredExperience developing SOA solutionsExperience with risk management, quantitative performance analysis, and lifecycle trade studiesFamiliarity with DoD certification and accreditation processes