3,899 senior system administrator jobs at 2,069 companies in United States
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Senior System Administrator
Houston, Texas, United States
OnsiteFull Time
Senior IT System Administrator responsible for design, optimization, and security of enterprise infrastructure, virtualization, storage, and cloud; leadership in SOC/IT operations and automation.
Ansible, Terraform, Puppet, Chef, PowerShell, Python, Zabbix, Prometheus, Grafana, Datadog, Docker, Kubernetes, OpenShift, VMware vSphere, vCenter, ESXi, NSX, SAN, NFS, FC, MPIO
1mo
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Senior System Administrator
United States
RemoteFull Time
8+ YOE8+ years systems administration experience; senior ServiceNow (ITSM/ITOM) administration; CMDB governance; SAM/ITSM/ITOM operations; bachelor's degree or equivalent; ability to obtain Public Trust; U.S. citizenship required.
ServiceNow, CMDB, ITSM, ITOM, SAM
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Applications System Administrator Senior
United States
$44-$66/hr RemoteFull Time
5+ YOESenior Applications System Administrator with 5 years of experience in app development/support; remote with travel; bachelor’s in CS; health IT focus.
Operating Systems, Databases, Server Administration, Clinical device integration
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Senior System Administrator
Annapolis Junction, Maryland, United States
$175k-$215k/yr OnsiteFull Time
15+ YOETS/SCI with Poly, 15+ years SA experience, BA/technical degree, DoD 8570 IAT I, Windows and Linux administration, patching and security compliance.
Windows Server, Linux, AWS, Ansible, Terraform, PowerShell, Bash, Python
1w
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Senior System Administrator
Silver Spring, Maryland, United States
OnsiteFull Time
3+ YOEBachelor's degree or equivalent experience,3+ years systems administration,active Secret clearance,Windows/Linux administration,VMware virtualization,PowerShell/Python scripting,ServiceNow experience.
Windows Server, Active Directory, Group Policy, DHCP, DNS, MECM, SCCM, VMware vSphere, PowerShell, Python, RHEL, Ubuntu, ServiceNow, Splunk, IIS, SQL Server, NetApp ONTAP, Dell EMC OneFS, Docker, Kubernetes, VMware Tanzu, Rancher, PPSM, RMF, IAVM, STIG
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Senior System Administrator
Annapolis Junction, Maryland, United States
$190k-$240k/yr OnsiteFull Time
15+ YOE15 years system administration experience, Windows and Linux server administration, IAVA patching, DoD 8570 IAT Level I, bachelor's degree in technical discipline (or 5 years additional SA experience), scripting and automation experience.
Linux, Windows, IAVA, PowerShell, Ansible, Terraform, AWS, EC2, Lambda, CloudFormation, PHP, .NET, C#, Microsoft SQL Server, Oracle
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Senior System Administrator
Tucson, Arizona, United States
$69k-$131k/yr OnsiteFull Time
2+ YOEProvide IT systems administration in Windows and Linux; obtain DoD 8140/8570 certification within 6 months; obtain final Secret clearance; 2+ years of relevant experience; onsite in Tucson, AZ.
Windows, Linux, DNS, DHCP, Active Directory, VMware, vCenter, vSphere, Exchange, OpenShift, Kubernetes, Docker, GitLab, Jenkins, Azure DevOps, MECM, WSUS, HPC
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System Administrator - Senior
Maxwell Air Force Base, Alabama, United States
OnsiteFull Time
8+ YOEActive Secret clearance, High School Diploma, Security+ and Network+ certifications, minimum 8 years' experience, system and security administration skills, effective written and verbal communication.
1d
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Senior System Administrator
Cincinnati or New York City
$105k-$160k/yr HybridFull Time
5+ YOEBachelor's or equivalent,5+ years systems administration,expertise with Windows/Mac,virtualization,cloud,AWS/Azure,PowerShell/Bash/Python,Active Directory,network fundamentals and vendor/project coordination.
PowerShell, Bash, Python, Active Directory, VMware, Hyper-V, AWS, Microsoft Azure, Microsoft Entra ID, Okta, Rippling, Snowflake
2w
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Senior System Administrator
United States
$130k-$140k/yr RemoteFull Time
7+ YOE7+ years progressive IT experience with specialized system administration, experience installing/configuring/maintaining software, presentation skills, business intelligence experience (Qlik or Power BI), and privileged-access baseline certification.
Qlik, Power BI
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Senior System Administrator
Jessup, Maryland, United States
$170k-$220k/yr OnsiteFull Time
15+ YOE15+ years system administration experience, strong RedHat Linux and Windows skills, Nessus/vulnerability management, TS/SCI with Polygraph, bachelor\u0002s degree or equivalent, experience with POA&Ms and STE/STN.
RedHat Linux, Windows Server 2012, Windows Server 2016, Windows Server 2019, Nessus
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System Administrator - Senior
Southport, North Carolina, United States
OnsiteFull Time
8+ YOE8+ years systems administration experience in DoD/federal environments; Windows Server, Active Directory, SCCM, virtualization, storage, backup, STIGs, vulnerability remediation, and documentation experience; active Secret clearance required.
Windows Server, Microsoft Active Directory, Microsoft Group Policy, DNS, DHCP, SMTP, Microsoft SCCM, VDI, NAS, SAN, NTFS, iSCSI, NFS, PowerShell, JavaScript, VMware, DoD PKI, STIGs
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System Administrator Senior
Arlington, Virginia, United States
$120k-$139k/yr RemoteFull Time
ASM ResearchNYSE: ACN: Provides IT and healthcare services to government agencies.
7+ YOE7+ years systems administration experience with enterprise Windows/Linux/virtualized/cloud, scripting (PowerShell/Bash/Python), backup/patch/configuration management, on-call support, ability to obtain background investigation and U.S. citizenship.
PowerShell, Bash, Python, Windows, Linux, AWS, Azure
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System Administrator
Annapolis Junction, Maryland, United States
OnsiteFull Time
10+ YOESenior System Administrator with 10 years LAN/WAN, 5 years hardware/software ops, Linux and Windows, SELinux, scripting, and security compliance; TS/SCI with Poly clearance.
Linux, Windows, SELinux, RPM, Log review, Scripting, Python, Bash, PowerShell, Ansible
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Senior System Administrator
Reno, Nevada, United States
$42-$59/hr RemoteFull Time
8+ YOEBachelor's in Computer Science (or equivalent) required; 8+ years client/server and W-intel server experience; 5+ years as Systems/Applications Administrator; MCSE/MCSA/MCDBA preferred; experience with configuration, patching, backup, and vendor coordination.
W-intel
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Senior System Administrator
Las Vegas, Nevada, United States
$91k-$199k/yr OnsiteFull Time
12+ YOEBachelor's degree or equivalent, 12+ years of computer systems experience, ability to obtain/maintain a government security clearance and valid state driver's license; experience with Windows, Active Directory, Hyper-V, PowerShell, VMware, Solaris, Ubuntu, storage (NAS/SAN), Dell servers, Dell EMC Unity, Cisco, Fortigate, backups and enterprise sys...
Windows 10, Windows Server 2019, Windows Server 2022, Windows Active Directory, Windows Hyper-V, Windows PowerShell, VMWare vSphere, VMWare vCenter, VMWare Horizon 8 VDI, Sun Solaris 10, Ubuntu 20.04, Microsoft Office 2013, Dell PowerEdge Server, Dell EMC Unity Storage, Cisco Switches, Fortigate Firewall Software, ManageEngine Software, ArcServe Backup Tape Software, NAS, SAN, ATO networks
1w
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Senior System Administrator
Jupiter, Florida, United States
OnsiteFull Time
7+ YOEBachelor's degree and 7+ years systems administration experience; 5+ years virtualization (VMware vSphere) and 5+ years cloud (AWS/Azure,M365); backup, storage, and data center experience; off-hours availability; strong troubleshooting and automation skills.
Amazon AWS, Microsoft Azure, M365, VMware vSphere, VMware Horizon, VMware Site Recovery Manager (SRM), Zerto, Commvault, Pure Storage, Dell/EMC Isilon, Windows Server, Active Directory, Debian, Ubuntu, Kubernetes, Docker, CrowdStrike, Zscaler
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Senior Network System Administrator`
Agoura Hills, California, United States
$98k-$115k/yr HybridFull Time
5+ YOESenior IT role requiring 5+ years in network/system administration, Azure AD/Entra, Fortinet, Intune, 3+ IT certifications.
Microsoft Entra ID (Azure AD), Fortinet FortiGate/EMS/FortiClient, Microsoft Intune, Microsoft 365, PowerShell, APIs, Azure, SAML, SSO, SSL
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Senior System Administrator
Janesville, Wisconsin, United States
$100k-$130k/yr OnsiteFull Time
7+ YOEBachelor's or equivalent, 7+ years enterprise systems administration experience; strong Windows Server, Microsoft 365/Azure, Active Directory, Hyper-V, SAN, networking, firewall (Cisco Firepower/SonicWall), Aruba/Ubiquiti, and PowerShell skills. US work authorization required.
Windows Server, Microsoft 365, Microsoft Azure, Active Directory, Hyper-V, SAN, MPIO, Cisco Firepower, SonicWall, Aruba, Ubiquiti, PowerShell, VMware, Microsoft Intune, Microsoft Entra ID (Azure Active Directory), Microsoft Exchange Online, Microsoft Teams, Microsoft SharePoint, DNS, DHCP, Group Policy, HP Nimble
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Senior System Administrator
Ashville, Ohio, United States
$113k-$149k/yr OnsiteFull Time
8+ YOE8+ years designing, deploying, and supporting classified, air-gapped IT systems; hands-on with physical hardware, Windows and Linux administration, virtualization (VMware), containerization (Podman), DISA STIG hardening, NIST 800-53/RMF familiarity, DoD 8570/8140 baseline certification, and active U.S. Top Secret clearance.
Lattice OS, Windows, Linux, VMware, Podman, Ansible, DISA STIGs, NIST 800-53, Risk Management Framework (RMF)
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