Active Directory Architect / Engineer LeidosActive Directory Architect / EngineerArlington, VA$131,300–$237,350Design, deploy, upgrade, and administer Active Directory Domain Services, including domain controllers, forests, domains, trusts, and replication topologies (i.e. Manage and optimize Group Policy Objects (GPOs), OU structures, and security baselines; including object management through bulk operations and automation, Troubleshoot and resolve complex AD-related issues, including authentication failures, replication problems, DNS issues, and Kerberos/NTLM problems, Plan and execute Active Directory migrations, consolidations, and upgrades (of both underlying server infrastructure and overall forest/domain functional levels), Develop and maintain disaster recovery, backup, and restore procedures for AD environments (including AD Recycle Bin and authoritative restores), Monitor AD health and performance using tools such as Microsoft System Center, Azure Monitor, or third-party solutions). Deep expertise in designing, deploying, upgrading, and administering Microsoft Active Directory Domain Services (AD DS), including domain controllers, multi-domain/forest architectures, trusts, replication topologies, Group Policy Objects (GPOs), OU design, and security baselines.
Lead Systems Engineer LeidosLead Systems EngineerBurke, VA$107,900–$195,050If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com. June 22, 2026For 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 Windows Administrator EntarianSenior Windows AdministratorRadford, Virginia$100,000–$140,000 / yearThree or more years’ experience supporting Cybersecurity patch management and Security Technical Implementation Guides (STIG), SRG, RMF, SCA-V, and Cyber Operational Readiness Assessments (CORA). Computing Environment (CE) Certification (i.e., Microsoft Certified Solutions Expert (MCSE), Server+, Cisco Certified Network Associate (CCNA), RedHat, Palo, etc., can be waived for 30 days after project join date.
Senior Windows Administrator IntePros FederalSenior Windows AdministratorRadford, VAFull timeQualifications DESIREDThree or more years of experience supporting cybersecurity patch management and compliance activities, including Security Technical Implementation Guides (STIG), Security Requirements Guides (SRG), Risk Management Framework (RMF), Security Control Assessor-Validator (SCA-V), and Cyber Operational Readiness Assessments (CORA).Who The Senior Windows Administrator will play a critical role in planning and implementing new system hardware and software, maintaining technical instructions and operating procedures, monitoring system performance, strengthening server security, and recommending technologies that improve efficiency and expand the current enterprise environment.
Windows Administrator (Secret Clearance) System OneWindows Administrator (Secret Clearance)Fort Belvoir, VirginiaRemoteWe’re hiring a Windows Administrator to support and secure a Windows-based infrastructure that underpins enterprise Identity & Access Management (ICAM) services—authentication, authorization, and access. Perform patching, system hardening, vulnerability remediation, and lifecycle management - Administer Active Directory, Group Policy, and Windows authentication services .
Windows Systems Administrator - McLean, VA - TS/SCI PGTEKWindows Systems Administrator - McLean, VA - TS/SCIMcLean, VirginiaWe are seeking a highly skilled Senior System Administrator to join a dynamic infrastructure team supporting next-generation technologies, including initiatives in the Artificial Intelligence (AI) space. PGTEK is a true consulting organization dedicated to helping clients achieve their business and technology objectives utilizing our decades of experience and business relationships.
Windows Systems Administrator - Mclean, VA - Ts/Sci PGTEKWindows Systems Administrator - Mclean, VA - Ts/SciMcLean, VA$185,000–$265,000 / yearWe are seeking a highly skilled Senior System Administrator to join a dynamic infrastructure team supporting next-generation technologies, including initiatives in the Artificial Intelligence (AI) space. Location: McLean, VA (transitioning to Chantilly, VA) Clearance Required: Active TS/SCI with CI Polygraph Salary Range: $185,000 – $265,000 Travel: Up to 20%.
NewWindows Systems Administrator Sienna Systems CorporationWindows Systems AdministratorAlexandria, VA$112,500–$117,500 / yearProvide Tier II and Tier III support for complex issues; troubleshoot, repair, and recover from hardware and software failures, keeping affected users and management informed. Run daily backup operations and manage the backup solution, verifying restores, managing media rotation and off-site handling, and performing file archival and purges.
Windows Systems Administrator Bart & AssociatesWindows Systems AdministratorAlexandria, VA$140,000–$200,000 / yearIn recognition of all these efforts, B&A has been named a Companies as Responsive Employers (CARE) award recipient by Northern Virginia Family Services and nominated by the Northern Virginia Chamber of Commerce for Outstanding Corporate Citizenship Award. B&A is proud to offer three robust individual and family medical plans to full time employees, including a Health Savings Account (HSA) option as well as two tiers of dental coverage, vision, life & AD&D, disability, accident, hospital indemnity, and critical illness insurance.
Windows Systems Administrator Tetrad Digital Integrity LLCWindows Systems AdministratorArlington, VAThis program is establishing a modern secure web service (SWS) operation as part of a state-of-the-art, highly automated platform capable of supporting a rapidly expanding customer population. Apply today to become part of the Leidos team that is assisting CESO as they migrate to a high security cloud environment by providing network and communication services, monitoring services, and system administration.
Windows Systems Administrator LeidosWindows Systems AdministratorArlington, VirginiaThis program is establishing a modern secure web service (SWS) operation as part of a state-of-the-art, highly automated platform capable of supporting a rapidly expanding customer population. August 6, 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.
NewSystems Administrator (Windows) Athena Technology GroupSystems Administrator (Windows)VirginiaAthena Technology Group, Inc. (ATG) is a Service-Disabled Veteran Owned Small Business (SDVOSB) focused on Information Technology and Communications consulting, system engineering, integration, deployment and operation of state of the art command and control and information systems that deliver critical network centric solution to the warfighter. The selected candidate will administer, maintain, and support Microsoft Windows server environments and enterprise infrastructure while ensuring system availability, security, and compliance with Department of the Navy and DoD requirements.
Senior Windows Desktop Systems Administrator The Tatitlek CorporationSenior Windows Desktop Systems AdministratorDahlgren, VirginiaFull timeThe specialized experience includes Linux system administration of Redhat and security setup and updates (IAVA's); UNIX system administration of Solaris, UNIX scripting, Thin Client, Sudo, IDM, NTFS, CIFS, DNS, RDP Client, and security setup and updates (IAVA's); Windows system administration of WSUS and third party solutions, GPOs Windows Server and Windows Workstations, Thin Clients (hardware/software), Networking and documentation creation/updates. While performing the duties of this job, the employee is required to use fabrication tools; stand; walk; sit; use hands to finger, handle, or feel objects, tools or controls; reach with hands and arms; climb stairs; balance; stoop, kneel, crouch or crawl; talk or hear; taste or smell.
Senior Windows IT Server Systems Administrator The Tatitlek CorporationSenior Windows IT Server Systems AdministratorDahlgren, VirginiaFull timeThe specialized experience includes Linux system administration of Redhat and security setup and updates (IAVA's); UNIX system administration of Solaris, UNIX scripting, Thin Client, Sudo, IDM, NTFS, CIFS, DNS, RDP Client, and security setup and updates (IAVA's); Windows system administration of WSUS and third party solutions, GPOs Windows Server and Windows Workstations, Thin Clients (hardware/software), Networking and documentation creation/updates. While performing the duties of this job, the employee is required to use fabrication tools; stand; walk; sit; use hands to finger, handle, or feel objects, tools or controls; reach with hands and arms; climb stairs; balance; stoop, kneel, crouch or crawl; talk or hear; taste or smell.
Senior Server Administrator (VMware / Windows / Active Directory) Talent Software Services, Inc.Senior Server Administrator (VMware / Windows / Active Directory)Springfield, VA$45.45 / hourKey Responsibilities: Perform Windows Server upgrades and migrations from 2012/2016/2019 to newer versions. Role Summary: Support server upgrade and infrastructure modernization projects.
NewWindows Systems Administrator D2 Technical ServicesWindows Systems AdministratorChantilly, Virginia$120,000–$140,000 / yearCertifications: Must possess an appropriate and current DoD Information Assurance (IA) Certification to be considered for employment; either valid CompTIA Security+ CE, Systems Security Certified Practitioner (SSCP) or Cisco Certified Network Associate (CCNA) -Security . Education: Bachelor’s degree in computer science, engineering, or a related field, or equivalent work experience (including military or technical training).
Senior Windows Systems Administrator The Tatitlek CorporationSenior Windows Systems AdministratorDahlgren, VirginiaFull timeWhile performing the duties of this job, the employee is regularly required to stand; walk; sit; use hands to finger, handle, or feel objects, tools or controls; reach with hands and arms; climb stairs; balance; stoop, kneel, crouch or crawl; talk or hear. The specialized experience includes Windows system administration of WSUS and third party solutions, GPOs Windows Server and Windows Workstations, Thin Clients (hardware/software) and documentation creation/updates.
Systems Administrator, Lead (Linux/Windows) AMERICAN SYSTEMSSystems Administrator, Lead (Linux/Windows)Arlington, VirginiaFull timeOverview: AMERICAN SYSTEMS , a 100% employee-owned federal contracting company, is seeking a Lead Systems Administrator with strong Linux CLI and Windows administration experience to support a Special Access Program in Arlington, VA. This role focuses on owning and optimizing enterprise Linux & Windows infrastructure across multiple datacenters, partnering with cybersecurity and engineering teams, and providing Tier III support for systems that cannot fail.
Senior System Administrator -Windows- Top SECRET - REMOTE-ONSITE Visual SoftSenior System Administrator -Windows- Top SECRET - REMOTE-ONSITEWinchester, VirginiaRemoteWe are seeking an experienced Senior System Administrator - Windows with AWS with following job responsibilities : Responsible for installing, configuring, and maintaining operating system workstations and servers, including web servers, in support of business processing requirements. Employee's health and dental coverage becomes effective after 30 days or first of the month after an employee completes initial 30 working days, we cover 50% for the employee's health and dental insurances.
Sr. Windows Systems Admininstrator Select Search AssociatesSr. Windows Systems AdmininstratorChantilly, VirginiaAs a key member of our infrastructure support team, you will be responsible for designing, implementing, and maintaining our Windows-based systems, networks, and applications. If you enjoy working with new technologies, enterprise-leading equipment, and have a passion for building and maintaining infrastructures, we would like to speak to you.