Systems Engineer/Administrator Kaiva CorpSystems Engineer/AdministratorArlington, VAFull timeManage and maintain Microsoft 365 services such as Microsoft Intune, Entra admin center with Entra Connect for cloud synchronization, Exchange admin center for mail and mailbox administration, Microsoft Defender, and Microsoft Purview. As a Systems Engineer/Administrator, you will be responsible for ensuring the secure and efficient operation of servers and systems in a variety of environments, including on-premises and cloud-based Microsoft products within our Federal Government Customer's environment.
Senior Exchange Administrator LeidosSenior Exchange AdministratorAlexandria, VA$92,300–$166,850 / yearDuties include conducting technical planning for hardware and software upgrades, review of implementation and upgrade guides, documentation updates to support Risk Management Framework (RMF) Authority to Operate (ATO) and extension requests. This role requires an individual with expertise managing on-prem Microsoft Exchange solutions in small, medium, and large enterprise environments including physical and virtual server technologies and managing Microsoft M365 Exchange Online in a hybrid environment.
System Administrator 2 # 26-23514 US Tech Solutions, Inc.System Administrator 2 # 26-23514Manassas, VAThis role helps ensure the availability, performance, security, and reliability of critical computing resources that support business and manufacturing operations. Client is seeking an IT Systems Administrator to support the day-to-day operation, maintenance, and administration of enterprise server, operating system, and infrastructure environments.
SolarWinds Administrator LeidosSolarWinds AdministratorHampton, VA$92,300–$166,850 / yearDemonstrated strong abilities in implementing and configuring monitoring solutions based on SolarWinds Orion products (Network Performance Monitor, Server & Application Monitor, Netflow Traffic Analyzer, Network Configuration Manager, Database Performance Analyzer, and others) in a distributed and highly available environment. If 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 .
Citrix Infrastructure Administrator LeidosCitrix Infrastructure AdministratorArlington, VA$73,450–$132,775 / yearThe DISA CESO ITSS team provides network operations and cyber defense support to the Defense Information Systems Agency (DISA), enabling secure and reliable communications for the Department of Defense (DoD) and Combatant Commands (COCOMs). If 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 .
NewNetwork Engineer Vaco LLCNetwork EngineerChesapeake, VACross-Technology Infrastructure Support – Collaborating with Network / Security / Infrastructure Teams to Support Integrated Solutions Across Routing / Firewalls / Wireless Networking / Network Access Control (NAC) Technologies. Wireless / Access Network Support – Supporting WiFi Connectivity / Access Layer Deployments / Network Access Services | Delivering Consistent User / Device Connectivity Across Enterprise Locations.
Linux System Administrator LeidosLinux System AdministratorAlexandria, VA$92,300–$166,850 / yearIf 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 . The candidate must have bachelor’s degree with 8 years of prior relevant experience or a master’s degree with 6 years of prior relevant experience, associate's with 10 years, or high school diploma with 12 years.
NewSenior Network Engineer CYNET SYSTEMSSenior Network EngineerMechanicsville, VA$45–$55 / hourTemporaryContractorPart timeThe candidate must have considerable knowledge and working experience with enterprise routers, switches, VPN concentrators, firewalls, wireless access points, and load balancers, including the ability to document, set up, configure, upgrade, manage, and troubleshoot these systems. Experience with networking features and protocols such as ARP, CDP, EIGRP, OSPF, BGP, VTP, Etherchannel, 802.1Q trunking, HSRP, QoS, multicast, IPsec, RADIUS/TACACS+, SNMP, BRI/PRI, and MPLS.
Lead Network Engineer (WAN Design and Implementation) System OneLead Network Engineer (WAN Design and Implementation)Fairfax, VA$100–$120 / hourThis role will manage a team of seven network engineers across multiple time zones, drive technical decisions, and partner closely with customer stakeholders and engineering leadership to ensure successful delivery. Lead the design and implementation of a global Wide Area Network (WAN) and serve as the senior customer-facing technical authority for the program.
IT Security Specialist PlanIT GroupIT Security SpecialistReston, VAManages and administers a wide range of security systems and tools: o Administers cloud-based security tools such as, Azure Security Center (Sentinel, Log Analytics, Azure WAF, Defender for Identity, Privileged Identity Manager); Microsoft 365 Security Suite (Defender, Advanced Threat Protection, Cloud Application Security, Protection Portal); Microsoft Security and Compliance Center; Microsoft Endpoint Manager (Intune); multi-factor authentication (MFA); web content filtering; and secure document sharing and collaboration solutions. o Operates cloud-based security tools such as, Azure Security Center (Sentinel, Log Analytics, Azure WAF, Defender for Identity, Privileged Identity Manager); Microsoft 365 Security Suite (Defender, Advanced Threat Protection, Cloud Application Security, Protection Portal); Microsoft Security and Compliance Center; Microsoft Endpoint Manager (Intune); multi-factor authentication (MFA); web content filtering; and secure document sharing and collaboration solutions.
Cloud Engineer LeidosCloud EngineerArlington, VA$87,100–$157,450If 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 25, 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.
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.
Network Administrator (Network Communications 3) Huntington Ingalls Industries IncNetwork Administrator (Network Communications 3)Virginia Beach, VA$82,045–$105,000 / yearThe NOSC functions as the Operations and Maintenance (O&M) for network operations support and provides troubleshooting of network connectivity including WAN circuits, equipment failures, router and switch configurations, firewall access control lists, VoIP device registrations and configuration, cryptographic device configurations and keying material. Coordinate with Navy, DISA, and commercial circuit providers for implementation and troubleshooting; maintaining Information Assurance compliance including IOS upgrades, network device configuration changes, firewall ACL verification and changes; and supporting remote sites in restoring network failures.
Network Administrator (Network Communications 3) - 29672 Huntington Ingalls Industries IncNetwork Administrator (Network Communications 3) - 29672VA$94,352–$98,370.48 / yearTroubleshoot network connectivity issues, including WAN circuits, equipment failures, router/switch configurations, firewall ACLs, VoIP device setup, and cryptographic device/keying material. 5 years relevant experience with Bachelors in related field; 3 years relevant experience with Masters in related field; 0 years experience with PhD or Juris Doctorate in related field; or High School Diploma or equivalent and 9 years relevant experience.
Network Engineer / Systems Administrator (SA) CymertekNetwork Engineer / Systems Administrator (SA)Chantilly, VirginiaNetwork Engineer, Systems Administrator, IT Infrastructure Engineer, Network Systems Administrator, Network Administrator, Systems Engineer, Cloud Systems Administrator, Network Operations Engineer, IT Support Engineer, Network Security Engineer, etc. Computer Science, Information Technology, Network Engineering, Systems Engineering, Computer Engineering, Information Systems, Cybersecurity, Electrical Engineering, Data Science, Applied Mathematics, etc.
Network Engineer / Administrator (Ts/Sci Clearance Required) NorthHill TechnologyNetwork Engineer / Administrator (Ts/Sci Clearance Required)Springfield, VirginiaProvide support to IT systems including day-to-day operations, monitoring and problem resolution for all of the client/server/storage/network devices, mobile devices, etc. Isolate and resolve hardware and software problems involving the applications, the operating system, the hardware, the communications infrastructure, or any combination therefore.
Network Administrator - Mid ValidaTekNetwork Administrator - MidFort Belvoir, VAPrimary focus will be on, handling internal projects for operations, supporting driving time-sensitive initiatives, supports ITIL service area activities (problem management, incident management, service request fulfillment, etc.) and specific tasks to a successful conclusion, operations management, configuration/change management, service level agreements (SLA). The I3TS program provides enterprise-wide IT support to enable DTRA's Information Management & Technology Directorate (ITD) to consolidate, modernize, and continuously innovate the delivery of IT services and mission capabilities to DTRA's internal and external mission partners operating in CONUS and OCONUS locations.
IT Engineer - Network Administrator BRMiIT Engineer - Network AdministratorVirginiaRemote$110,000–$140,000 / yearNetwork Administrator Engineer manages and maintains an organization’s network infrastructure, ensuring security, performance, and reliability. **High Profile roles may require candidates to fly to customer HQ for in person interview (expenses paid)** .
Network Administrator - Mid ValidaTek IncNetwork Administrator - MidFort Belvoir, VAPrimary focus will be on, handling internal projects for operations, supporting driving time-sensitive initiatives, supports ITIL service area activities (problem management, incident management, service request fulfillment, etc.) and specific tasks to a successful conclusion, operations management, configuration/change management, service level agreements (SLA). The I3TS program provides enterprise-wide IT support to enable DTRA's Information Management & Technology Directorate (ITD) to consolidate, modernize, and continuously innovate the delivery of IT services and mission capabilities to DTRA's internal and external mission partners operating in CONUS and OCONUS locations.