Senior System Administrator ManTechSenior System AdministratorColumbia, MDConfigure and manage Linux, Windows, and Unix operating systems, installs/loads operating system software and patches to maintain security compliance, troubleshoot, maintain integrity of and configure network components, along with implementing operating system enhancements to improve reliability & performance. As a Senior System Administrator, you will work alongside customers, Integrated Product Teams (IPTs), and vendors to support the implementation and compliance of advanced EIT capabilities through Data Center & Compute Services.
Information Systems Security Officer (ISSO) — Subject Matter Expert, Level I RividiumInformation Systems Security Officer (ISSO) — Subject Matter Expert, Level IWashington, District of ColumbiaThe Information Systems Security Officer (ISSO) - Subject Matter Expert (SME), Level I is responsible for providing comprehensive cybersecurity support for a portfolio of 130+ Department of Homeland Security (DHS) Intelligence Enterprise (DHS IE) information systems spanning classified and unclassified environments, including on-premises, cloud, hybrid, and cross-domain solutions. In addition to traditional ISSO responsibilities, the incumbent serves as the Sensitive Compartmented Information Facility (SCIF) Information Security Compliance Representative (ISCR) , ensuring assigned SCIF systems, hardware, and facilities remain compliant with Intelligence Community security policies and accreditation requirements.
NewInformation Technology Specialist (Systems Administrator - ADP) U.S. Department of JusticeInformation Technology Specialist (Systems Administrator - ADP)Washington, DC$89,508–$116,362 / yearTo be considered for this position you must meet the following requirements: Basic Requirements: Applicants may qualify by meeting or exceeding the minimum proficiency level established for each of the required competencies listed below, The required competencies for the GS-12 grade level are Attention to Detail, Customer Service, Decision Making, Information Management, Interpersonal Skills, Oral Communication, Problem Solving, Teamwork, and Technical Competence. Customer Service - Works with clients and customers (that is, any individuals who use or receive the services or products that your work unit produces, including the general public, individuals who work in the agency, other agencies, or organizations outside the Government) to assess their needs, provide information or assistance, resolve their problems, or satisfy their expectations; knows about available products and services; is committed to providing quality products and services.
System Administrator T12 TECHNOLOGIES LLCSystem AdministratorBaltimore City, MDPart timeThis is a fully on-site role supporting an on-premises-inclusive environment—physical workstations and office IT, an on-premises Windows Server and Active Directory footprint, and the company network—alongside cloud workloads in Microsoft 365, Microsoft Azure, and Amazon Web Services (AWS), serving diverse federal, state, and healthcare clients. Environment: An on-premises-inclusive environment that includes on-premises Active Directory (with Group Policy), a Windows Server fleet, physical endpoints and peripherals, the office LAN/Wi-Fi, and hybrid telephony—administered alongside Microsoft 365, Azure, and AWS cloud workloads.
NewEndpoint Management Systems Engineer - TS/SCI with Polygraph GD Information TechnologyEndpoint Management Systems Engineer - TS/SCI with PolygraphAnnapolis Junction, MarylandAs an Endpoint Management Systems Engineer, you will support our defense intelligence mission customer’s enterprise by engineering, deploying, securing, and maintaining platforms that deliver operating systems, applications, and configurations to thousands of devices. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available.
ITSM Administrator LeidosITSM AdministratorSuitland, MarylandAugust 10, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. You will troubleshoot platform issues, maintain asset and configuration documentation, develop operational reporting and dashboards, and support platform upgrades and improvements with minimal disruption to operations.
NewStorage Systems Administrator - TS/SCI w/Poly GD Information TechnologyStorage Systems Administrator - TS/SCI w/PolyAnnapolis Junction, MarylandTo ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. Coordinate with engineering, cybersecurity, server, virtualization, and monitoring teams to integrate new capabilities, support technology refresh, and maintain secure, reliable storage operations.
System Administrator (Enterprise Infrastructure) Power3 SolutionsSystem Administrator (Enterprise Infrastructure)Laurel, MarylandYou will also work with network, storage, and server personnel to define new or modified solutions to complex problems; respond to requests for new systems to meet capacity and user requirements; and determine required power, space, cooling, and funding to meet these goals. Configuring and managing Linux, Unix, and Windows operating systems and installing/loading operating systems software, troubleshooting, maintaining integrity of and configuring network components, along with implementing operating systems enhancements to improve reliability and performance.
Sr. Information Systems Specialist Expert In Recruitment SolutionsSr. Information Systems SpecialistWashington, DCProvide a senior engineer to deliver database server administration for the Board's on-premises SQL Server and PostgreSQL environments as automated, FISMA-compliant code — supporting the PostgreSQL ATO, cloud-readiness, and platform modernization. Tasks Design and implement CI/CD pipelines in GitLab for database server and instance builds, version upgrades, patching, cumulative updates, and configuration changes across SQL Server and PostgreSQL server enterprise service offerings.
IT Support Engineer Global Strategy GroupIT Support EngineerWashington, DC$65,000–$80,000 / yearThe IT Service Desk Engineer will provide technical support across GSG's modern cloud-based environment, troubleshoot hardware and software issues, manage endpoint deployments, administer user accounts, and contribute to the continuous improvement of IT services. The ideal candidate enjoys solving problems, takes ownership of issues from start to finish, communicates effectively with both technical and non-technical users, and is passionate about providing an exceptional support experience.
Windows / Linux System Administrator Marathon TSWindows / Linux System AdministratorAnnapolis Junction, MDInstall, configure, operate, monitor, and maintain enterprise infrastructure, including web servers (e.g., IIS), application servers, and telecom hardware (e.g., Dell PowerEdge servers, Anaya J Series phones). - Install, configure, troubleshoot, and resolve issues related to telephony systems, Windows / Linux servers, network connectivity, and system integrations with Active Directory, DNS, DHCP, and LDAP.
NewVirtualization Systems Administrator - TS/SCI w/Poly GD Information TechnologyVirtualization Systems Administrator - TS/SCI w/PolyAnnapolis Junction, MarylandTo ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. As a Virtualization Systems Administrator supporting Infrastructure Services, you will be responsible for the operation, sustainment, and security of enterprise virtual server environments across multiple networks and enclaves.
Systems Administrator - Mid Level EC Technology, LLCSystems Administrator - Mid LevelReston, VAEvans & Chambers partners with the US national defense community to create fully integrated, resilient, and innovative digital solutions that enable them to make smart decisions in real-time. Working with a team you will provide services and support to the mission, to include design, planning, and execution of data exploitation workflows.
Senior Linux System Administrator ManTechSenior Linux System AdministratorFort Meade, MDIn this role, you will provide support for implementation, troubleshooting, and maintenance of IT systems, as well as manage IT system infrastructure and any processes related to these systems. + Configure and manage Linux and Windows operating systems; install, load, and enhance OS software for improved reliability and performance.
Jr. Systems Administrator Paragone Solutions, Inc.Jr. Systems AdministratorMcLean, VAPart timeWorking under the guidance of senior technical staff, the Junior Systems Administrator assists with system deployments, user administration, endpoint management, patch management, vulnerability remediation, and security operations while ensuring systems remain reliable, secure, and compliant with organizational policies. SecureITSM, a division of Paragone Solutions, Inc, is an IT Managed Service Provider (MSP) supporting DoD contractors who must comply with Cybersecurity Maturity Model Certification (CMMC) requirements.
Senior Systems Administrator (Okta) Ariel PartnersSenior Systems Administrator (Okta)Fairfax, VirginiaWe are looking for team members who share our values of: Integrity to do the right thing even when it hurts; Commitment to the long-term success and happiness of our customers, our people, and our partners; Courage to take on difficult challenges, accept new ideas, and accept incremental failure; and the constant pursuit of Excellence . The Senior Systems Administrator (Okta) is responsible for the stable operation, administration, and maintenance of the DLA Okta environments, including user management, configuration, integration, and Tier III technical support.
L&I: Azure DevOps Engineer & Administrator PeopleNTech LLCL&I: Azure DevOps Engineer & AdministratorAlexandria, VAAzure DevOps & GitHub Enterprise Administration Administer and optimize Azure DevOps Services (Boards, Repos, Pipelines, Boards, Artifacts, Test Plans). This role isresponsible for architecting, securing, and maintaining Azure DevOps and GitHubEnterprise environments, implementing CI/CD automation, and ensuring compliancewith commonwealth security frameworks.
NewSystems Integration & Support Engineer LeidosSystems Integration & Support EngineerBethesda, MarylandThe position requires a broad understanding of software, computing hardware, networking, virtualization, and system integration, with particular emphasis on: Virtualization: Familiarity with creating, configuring, and managing Virtual Machines. August 25, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
Senior SQL Application Developer (SQL, Crystal Reports, ETL) MicroHealth, LLCSenior SQL Application Developer (SQL, Crystal Reports, ETL)Vienna, VAFull timeThis position requires expertise in both Windows and Linux database environments, with responsibilities including SQL programming, SQL Server Agent automation, Database Mail, SSRS report development, Crystal Reports modernization, SSIS package development, production database support, infrastructure monitoring, server maintenance, and enterprise reporting solutions. This role provides advanced technical support for the program, serving as the principal technical resource responsible for enterprise database development, database administration, reporting modernization, production support, ETL development, and SQL Server operational maintenance supporting mission-critical healthcare reporting systems.
Information System Security Officer Oxenham Group LLCInformation System Security OfficerLorton, VA$140,000–$180,000 / yearWorking alongside the ISSM, system administrators, engineers, program managers, and government stakeholders, the ISSO helps ensure systems remain compliant with the Joint SAP Implementation Guide (JSIG), the DoD Risk Management Framework (RMF), and applicable Intelligence Community and DoD directives. Develop, maintain, and update core RMF documentation: System Security Plans (SSPs), Security Control Traceability Matrices (SCTMs), Plans of Action and Milestones (POA&Ms), Security Assessment Reports (SARs), and Continuous Monitoring Plans.