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678 windows administrator jobs at 294 companies in Frederick, MD

2d
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Windows System Administrator
Laurel, Maryland, United States
$128k-$214k/yr OnsiteFull Time
ManTech
ManTech: Provides technology solutions for defense and intelligence agencies.
15+ YOE15+ years systems administration experience, Windows Server proficiency, Active Directory, DHCP, patch management, IAT II (DOD 8140) and current TS/SCI with poly required, bachelor\u0002s degree or equivalent experience, strong troubleshooting and communication skills.
Windows Server, Active Directory, Group Policy, DHCP, VMware, vCenter, JIRA
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1mo
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Windows System Administrator
College Park, Maryland, United States
OnsiteFull Time
Entarian
Entarian: Provides mission-critical engineering and technology solutions for government agencies.
1+ YOE1-3 years Windows systems administration experience; manage ServiceNow ticket queues; troubleshoot Windows 10-11; administer Active Directory, DNS, user accounts; ability to lift 50 lbs; U.S. citizenship and Public Trust clearance eligibility.
ServiceNow, Active Directory, Windows 10-11, DNS
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6d
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Senior Windows Systems Administrator
Washington or Sterling or United States
$112k-$179k/yr RemoteFull Time
Peraton
Peraton: Provides advanced technology and mission support for government agencies.
10+ YOEU.S. citizen with active Secret clearance, 10+ years Windows Server administration, 7+ years Active Directory experience, 3+ years PowerShell/VB scripting, and knowledge of government IT security.
Windows Server, Microsoft Active Directory, PowerShell, VBScript, Microsoft Project, Microsoft Visio, Windows 11
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2d
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Windows Systems Administrator
Alexandria, Virginia, United States
$140k-$200k/yr OnsiteFull Time
B&A
B&A: Provides IT systems integration and data services to federal agencies.
0+ YOEAdminister and sustain Windows server/workstation environments, support LAN/WAN operations, diagnose and resolve complex system/network issues; TS/SCI clearance required; 0+ years specialized experience; bachelor\u0002s degree preferred.
Windows Server
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1w
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Windows Senior System Administrator
Germantown, Maryland, United States
$100k-$120k/yr OnsiteFull Time
Edgewater Federal Solutions
Edgewater Federal Solutions: Provides IT and cybersecurity services to federal government agencies.
2+ YOEUS citizen with active Top-Secret or Q clearance,2+ years Windows Server administration,AD/GPO management,WSUS/SCCM patching,DISA STIG hardening,documentation skills,and ability to lift 50 lbs and mentor junior staff.
Windows Server, WSUS, SCCM, DISA STIGs, Active Directory, Group Policy Objects (GPO), MS Hyper-V, VMWare ESXi, VMware Horizon vCenter, PKI
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2mo
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Linux/Windows Systems Administrator
Springfield, Virginia, United States
OnsiteFull Time
Ascension Federal Services
Ascension Federal Services: Provides IT services without mentioning the name.
4+ YOE4 years of experience in Linux/Windows server administration; Bachelor's in IT; Security+ or equivalent; Secret clearance.
Linux, Windows, Bash, Python, PowerShell, VMware, Hyper-V, Docker, Kubernetes, Ansible, Puppet, Chef, AWS, Azure, GCP, Firewalls, Security best practices
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17h
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Sr Windows System Administrator
Chantilly, Virginia, United States
$180k-$190k/yr OnsiteFull Time
Quantum Sky
Quantum Sky: Engineers mission-critical technology for federal government and defense sectors.
8+ YOE8+ years Windows systems administration experience; architecture and support of Windows infrastructure including AD, Group Policy, DNS, patching, file servers, Exchange; SCCM/MDT; backup/DR; troubleshooting; strong communication; travel up to 20%.
Active Directory, Group Policy, DNS, SCCM, MDT, Exchange Server, PowerShell, Python, Bash, VMware, Hyper-V, KVM, SQL Server, ServiceNow
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6d
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Senior Windows Systems Administrator
Washington or Sterling
$112k-$179k/yr RemoteFull Time
Peraton
Peraton: National security and mission-critical government technology services provider.
10+ YOE10+ years Windows Server and Active Directory administration experience, PowerShell/VB scripting, government IT security knowledge, U.S. citizenship, active SECRET clearance.
Windows Server 2016, Windows Server 2019, Windows Server 2022, Windows Server 2025, Microsoft Active Directory, DNS, PowerShell, VB, Microsoft Project, Microsoft Visio, Microsoft Windows 11
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3mo
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Senior Windows Administrator
Laurel, Maryland, United States
$100k-$245k/yr OnsiteFull Time
Johns Hopkins University Applied Physics Laboratory
Johns Hopkins University Applied Physics Laboratory: Conducts research and engineering for national security and space.
5+ YOE5–10+ years Windows Server/MECM/SCCM; Active Directory; DISA STIG; CompTIA Security+; DoD environment; Secret clearance eligibility.
Microsoft Endpoint Configuration Manager (MECM/SCCM), Active Directory, Group Policy, DISA STIG, RMF
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1mo
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Senior Windows Systems Administrator
Bethesda, Maryland, United States
OnsiteFull Time
Black Canyon Consulting
Black Canyon Consulting: Provides specialized IT and scientific support to federal agencies
5+ YOE5+ years Windows systems administration experience, deep Active Directory expertise, hybrid cloud (AWS/GCP) experience, strong PowerShell automation skills, and hands-on experience with Microsoft server ecosystem and MECM/SCCM.
Windows Server 2019, Windows Server 2022, Active Directory (AD DS), Microsoft Entra ID, ADFS, IIS, SQL Server, Hyper-V, Microsoft Configuration Manager (MECM / SCCM), WSUS, Group Policy (GPO), System Center Virtual Machine Manager, Amazon Web Services, Google Cloud Platform, Microsoft Azure, PowerShell, Kerberos, NTLM, SAML
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1w
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Windows Server OS Administrator
McLean, Virginia, United States
$85k-$100k/yr RemoteFull Time
American Systems
American Systems: Providing engineering and IT solutions to federal government agencies.
6+ YOE6+ years supporting Windows Server in enterprise datacenters, Azure/AVS experience, PowerShell and infrastructure automation (Ansible), ability to obtain Public Trust, US work authorization, strong communication and ITIL experience.
Windows Server, VMware vSphere, Azure, Azure Monitor, Azure Update Management, Defender for Cloud, Azure VMware Solution (AVS), AWS, GCP, PowerShell, Ansible, GitLab, Carbon Black, CyberArc, Defender EM, Remedy, ServiceNow, Active Directory, DNS, DHCP, Group Policy
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1d
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Sr. Windows Systems Administrator
Columbia, Maryland, United States
$145k-$165k/yr OnsiteFull Time
Astrion
Astrion: Provides engineering, cybersecurity, and mission support services.
8+ YOEActive TS/SCI clearance, bachelor's or equivalent, 8+ years Windows/AD admin in classified DoD environments, RMF/STIG/C2C experience, PowerShell automation, MECM/WSUS patching, ACAS/Nessus/SCAP and SIEM familiarity.
Windows Server, Windows 11, Active Directory, PowerShell, Microsoft Endpoint Configuration Manager, MECM, WSUS, MDT, WDS, ACAS, Nessus, SCAP, SIEM, Microsoft SharePoint, Hyper-V, NetApp, SAN, Git, Microsoft Defender for Endpoint, AppLocker, WDAC, Azure Government
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2w
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Classified Windows System Administrator
El Segundo or Chantilly
$75k-$113k/yr OnsiteFull Time
The Aerospace Corporation
The Aerospace Corporation: Provides technical expertise and research for national space programs.
3+ YOETS/SCI clearance and U.S. citizenship required. 3+ years enterprise Windows administration, 2+ years virtualization (VMware or Hyper-V). Must meet DoD 8570.01-m IAT Level II (CompTIA Security+). Experience with Citrix, Active Directory, NFS, and EM environments preferred.
Citrix, Windows Terminal Server, VMware, Hyper-V, Windows Admin Center, MS SQL, Puppet, PowerShell DSC, Ansible, Bash, PowerShell, Terraform, Python, NFS, Active Directory
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2mo
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DS Windows System Administrator
Chantilly, Virginia, United States
OnsiteFull Time
Probity
Probity: Provides IT, cybersecurity, and engineering services to government agencies.
7+ YOE7+ years of Windows systems experience; Active Directory, scripting; patch management; enterprise security.
Active Directory, LDAP, Centrify, PowerShell, VB, Windows Server 2008/2012/2016, SCOM, ACS, Microsoft Exchange, Outlook, Symantec, McAfee, VMware, LAN/TCP-IP, Cisco networking
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1mo
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Principal Windows Systems Administrator - Polygraph
Dulles, Virginia, United States
$104k-$155k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Designs and manufactures advanced aerospace and defense systems.
3+ YOERequires U.S. Top Secret/SCI with polygraph, meet 8140/8570 IAT Level II certs, 3+ years IT experience (degree-dependent), Windows Server/Active Directory administration, GPO, patching, backups, and classified environment experience.
Windows Server OS, Active Directory, Group Policy, VMWare, Microsoft Exchange, HBSS, Solar Winds, Splunk, ServiceNow, JIRA, SAN, LDAP, Windows AD, Cisco
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1mo
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Principal Windows Systems Administrator - Polygraph
Dulles, Virginia, United States
$104k-$155k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Develops and manufactures advanced aerospace, defense, and space systems.
3+ YOEUS citizen with current Top Secret/SCI and polygraph (adjudicated within 5 years); meet 8140/8570 IAT Level II baseline; 3+ years IT experience (varies by degree); Windows Server, Active Directory, GPO, and classified environment experience required.
Windows Server, Active Directory, Group Policy, Microsoft Exchange, VMware, ServiceNow, Jira, HBSS, SolarWinds, Splunk, SAN, Linux, Cisco
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1mo
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Windows System Administrator (SA) 2 w/ Poly
Fort Meade, Maryland, United States
$150k-$180k/yr OnsiteFull Time
Amentum
AmentumNYSE: AMTM: Provides engineering, technology, and mission support to government agencies.
10+ YOETS/SCI with poly required; Bachelor's in CS/Cyber/IT (or extensive experience); 10+ years SA experience; DoD 8570 IAM Level I; Windows/UNIX system administration, monitoring, troubleshooting, and capacity planning.
UNIX, Windows
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2mo
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Windows & Linux Systems Administrator Staff
Fort Meade, Maryland, United States
$100k-$176k/yr OnsiteFull Time
Lockheed Martin
Lockheed MartinNYSE: LMT: Designs and manufactures global security and aerospace systems.
10+ YOERequires TS/SCI w/Poly, bachelor’s degree or equivalent with 10+ years experience (or +5 years substitute), DOD 8570 IAT2, expertise in Linux/Windows administration, automation with Ansible, scripting (Bash/PowerShell/Python), Arista networking, DoD STIG/CIS compliance.
RHEL, CentOS, Ubuntu, Debian, Windows Server 2016, Windows Server 2019, Windows Server 2022, Active Directory, LVM, RAID, SMB, NFS, DoD STIG, DISA STIGs, CIS Benchmarks, Ansible, WinRM, Bash, PowerShell, Python, Ansible Tower, AWX, Git, Arista EOS, CloudVision, eAPI, BGP, OSPF, EVPN, VXLAN, ACLs, RADIUS, TACACS+, 802.1X, MACsec, Confluence, SharePoint, Nagios, Prometheus, Grafana, ELK Stack, Splunk, Logstash, Jenkins, GitLab CI/CD, CircleCI, Docker Swarm, Kubernetes, Apache Mesos, AWS, Azure, GCP, Docker Hub, Ceph, SAN, NAS
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2mo
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Windows System Adminitrator
Chantilly, Virginia, United States
OnsiteFull Time
Closure Technologies
Closure Technologies: Global technology firm delivering data integration and processing solutions.
7+ YOE7+ years Windows systems experience; AD/LDAP/Centrify; patching; PowerShell/VB; Windows Server 2008/2012/2016; SCOM; Exchange and antivirus.
Active Directory, LDAP, Centrify, PowerShell, VBScript, Windows Server, SCOM, ACS, Microsoft Exchange, Symantec Antivirus, McAfee Antivirus
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1mo
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Windows Systems Administrator - TS/SCI with Polygraph
Annapolis Junction or Washington or Colorado Springs or Tampa or Springfield
$111k-$150k/yr OnsiteFull Time
General Dynamics Information Technology
General Dynamics Information TechnologyNYSE: GD: Provides mission-critical IT services to government and defense organizations.
8+ YOEActive TS/SCI with favorable polygraph, 8+ years related IT experience, DoD 8140 IAWF cert (e.g., Security+ CE), hands-on Windows Server/AD/GPO/PowerShell, STIG/HBSS compliance, virtualization and patch management experience; US citizenship required.
Group Policy Objects (GPO), Microsoft Windows Server, Microsoft Active Directory, PowerShell, STIG, HBSS, SCAP
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