Senior Systems EngineerLeidos Intelligence Group uses a wide range of capabilities in Digital Modernization, Mission Software Systems, and enabling technologies like Artificial Intelligence and Machine Learning to support our customers' mission to defend against evolving threats around the world. Our team's focus is ensuring our intelligence customers have the right tools, technologies, and tactics to keep pace with an ever-evolving security landscape and succeed in their pursuit to protect people and critical assets.We are seeking a Senior Systems Engineer responsible for the design, build, integration, and lifecycle management of Windows-based systems within complex enclave environments. This role focuses on delivering and sustaining reliable, secure, and interoperable system capabilities across Windows server infrastructure, domain services, and integrated COTS applications.The position centers on Windows domain engineering, including Active Directory administration, Group Policy architecture, and integration of core services such as Citrix, Microsoft Exchange, and Microsoft SQL Server.
The role also includes support for endpoint security enforcement using Trellix ePolicy Orchestrator (ePO), as well as certificate and PKI services that support authentication and secure communications across systems.This environment consists of multiple independent systems and domains supporting a wide range of COTS and engineering applications. These may include collaboration and workflow tools (such as Jira, Confluence, and SharePoint) as well as engineering platforms (such as SolidWorks and MATLAB). Deep expertise in any single application is not required; success in this role depends on the ability to integrate and sustain interoperability across diverse systems.The role requires strong engineering discipline, the ability to manage multiple concurrent efforts, and the flexibility to support both design and operational activities as needed.Responsibilities Include:Windows Domain Engineering & Systems LifecycleDesign, build, integrate, and maintain Windows-based systems across enclave environmentsEngineer system-level solutions spanning domain services, server infrastructure, and integrated applicationsSupport modernization and sustainment of existing systems and platformsActive Directory & Domain Services AdministrationAdminister and maintain Active Directory environments supporting domain-joined systems and servicesEngineer secure and scalable Windows Server environments supporting core servicesSupport PKI and certificate services, including certificate lifecycle management and integration with domain and application servicesUtilize PowerShell to automate routine administrative tasks, streamline operational workflows, and support system configuration and troubleshooting activitiesCreate and maintain technical documentation including design artifacts and as-built documentation for system designs and integrationsGroup Policy Design & ManagementDesign, implement, and maintain Group Policy Objects (GPOs) to enforce configuration and security standardsTroubleshoot Group Policy inheritance, replication, and application issuesMaintain baseline configurations for domain-joined systems across the enclaveApplication & COTS IntegrationIntegrate and support systems within Active Directory environments, including Microsoft Exchange, Microsoft SQL Server, and Citrix environmentsSupport authentication, authorization, and service integration across diverse COTS and engineering platformsEnsure interoperability between infrastructure services and mission applications, including certificate-dependent servicesEndpoint Security & Systems ManagementSupport endpoint security configuration and policy enforcement using Trellix ePolicy Orchestrator (ePO)Ensure systems comply with established security baselines and organizational requirementsCollaborate with security teams to support vulnerability remediation and enforcement activitiesSystems Integration & CollaborationWork closely with application owners, network engineers, storage teams, and security teams to support integration across enclave systemsResolve cross-platform integration challenges spanning identity, infrastructure, and application layersSupport troubleshooting across interconnected systemsOperational Support & SustainmentProvide operational support as required to maintain stability of domain and server environmentsSupport incident response and infrastructure issue resolution as part of engineering ownershipRequired Experience, Skills, and Education:Requires a Bachelor degree and at least 8 years of experience or Master and at least 6 years of experience OR at least 12 years of experience in lieu of degree.Must have a TS/SCI with poly to be considered.Must have strong knowledge of Windows Active Directory, Group Policy and must understand WSUS and third party software patching.Integrate and support systems within Active Directory environments, including Microsoft Exchange, Microsoft SQL Server, and Citrix environmentsPreferred Experience, Skills, and Education: The following skills are not primary ownership areas but are valuable for effective collaboration across enclave infrastructure teams:NetApp storage systems and SAN conceptsNutanix virtualization and HCI environmentsFSLogix profile/containerization in VDI environmentsCitrix virtualization and application delivery conceptsMulti-factor authentication platforms and identity integration patternsData center replication and disaster recovery concepts (replication, failover, site resilience)Development and maintenance of operational runbooks and proceduresClearance Required:TS/SCI with PolyYou will be required to pass both a customer required and administered medical and psychological screening, as a condition of employment