110 systems administrator jobs at 75 companies in Seguin, TX
6d
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Windows Systems Administrator
San Antonio, Texas, United States
OnsiteFull Time
5+ YOERequires 5+ years of Windows systems administration, DISA STIG hardening, VMware and SAN familiarity, a related bachelor's degree, Microsoft certification, and U.S. citizenship for government investigation.
Microsoft Windows, DISA STIGs, VMware, SAN, Active Directory, Group Policy, Red Hat Linux, Scrum, Lean Startup, XP, Microsoft MCSE, Microsoft MCSA, LAN, WAN
3mo
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Systems Administrator
San Antonio, Texas, United States
OnsiteFull Time
2+ YOEExperience with Windows and Linux server operations, sustainment, and management; DoD SECRET clearance; 2 years related experience; Bachelor or Master degree with related experience.
Windows Server, Linux (Red Hat Enterprise Linux), VPN, Active Directory, SCCM, SQL, MySQL, SELinux, DNS, VMware, ESXi, vCenter, vSphere, Networking devices, Firewall
2mo
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Systems Administrator
Tacoma or Aurora or San Antonio or Falls Church
OnsiteFull Time
8+ YOE8+ years experience in mobile application deployment, 4‑year degree in IT/math or equivalent, active IAT II and CE certifications to meet DoD 8570/8140, U.S. citizenship, and experience with web development technologies and secure DoD environments.
HTML, CSS, JavaScript, React, Angular, Vue, ASP.NET, C#, Sitecore, SQL, MVC5, PWAs, Jira
1mo
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Systems Administrator
San Antonio, Texas, United States
OnsiteFull Time
4+ YOE4+ years implementing and supporting Active Directory/GPO, experience with BitLocker, backup/DR, virtualization, PowerShell, Windows and Linux; must hold valid Texas driver license and be able to drive company vehicle.
PowerShell, Active Directory, GPO, Azure, VMware, vSphere, Okta, Veeam, Event Collection, Remote Desktop Services, Citrix, BitLocker, Windows, Linux, RIS, PACS, Mirth, Qvera, MEDQ, NAS/SAN, UPS
1mo
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Systems Administrator
San Antonio, Texas, United States
OnsiteFull Time
4+ YOE4+ years implementing/supporting Active Directory and Group Policy, intermediate PowerShell, advanced Windows, intermediate Linux, 2+ years virtual infrastructure preferred, HS required, TX driver license required.
PowerShell, Windows Desktop, Windows Servers, Linux, Active Directory, GPO, Azure, VMware, vSphere, Okta, Veeam, Event Collection, Remote Desktop Services, Citrix, BitLocker, Domain Management, RIS, PACS, Mirth, Qvera, MEDQ, NAS, SAN, UPS
2mo
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Systems Administrator II
San Marcos, Texas, United States
$5k/mo HybridFull Time
Requires coding in Python, JavaScript, or PowerShell; RESTful APIs or GraphQL; OAuth, API keys, JSON/XML parsing; data mapping; middleware diagnostics; and enterprise integration experience.
Python, JavaScript, PowerShell, RESTful APIs, GraphQL, OAuth, JSON, XML, Postman, iPaaS, SQL, Git, TeamDynamix, TDX, Banner, Workday, Canvas
3w
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Systems Administrator II
San Antonio, Texas, United States
OnsiteFull Time
3+ YOEActive TS/SCI clearance, Bachelors or equivalent in IT-related field, CASP+/SecurityX/PMP/CAPM/Project+, 3+ years administering enterprise Windows/Linux, AD, virtualization, patching, backup, and endpoint support.
Windows, Linux, VMware, Active Directory, Group Policy, PowerShell, Bash, DISA STIGs
1w
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Principal Cyber Systems Administrator (TG)
Annapolis Junction or San Antonio or Aurora or Cary
$99k-$155k/yr OnsiteFull Time
5+ YOEActive TS/SCI with polygraph, HS+10yrs or Bachelor's+5yrs, experience implementing/troubleshooting/maintaining IT systems, Tier1/2 support, UNIX and Windows administration, system monitoring and capacity planning.
UNIX, Windows
2w
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Telecommunications Systems Administrator Sr
Austin, Texas, United States
HybridFull Time
9+ YOENine+ years in systems design/installation/admin in UNIX/Windows with 5+ years supporting high-availability systems; experience with P25/OpenSky and Ericsson private LTE; vendor certifications preferred.
P25, OpenSky, Unified Administration (UAS), ENM, One Layer, Ericsson Security Manager, UNIX, Windows
1w
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IT Systems Administrator
San Antonio, Texas, United States
OnsiteFull Time
3+ YOE3+ years administering Microsoft 365 and Azure/Entra ID, experience with conditional access/MFA, endpoint security, Citrix VDI, PowerShell scripting, and vendor management; willingness for after-hours escalation and travel for site buildouts.
Microsoft 365, Exchange Online, SharePoint, Microsoft Teams, OneDrive, Azure, Entra ID, CrowdStrike, Qualys, Citrix, Intune, Windows Autopilot, PowerShell, Microsoft Graph API, Copilot, Claude
1w
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Senior System Administrator
New Braunfels, Texas, United States
$100k-$140k/yr OnsiteFull Time
5+ YOERequires 5–8 years of systems administration experience, advanced Active Directory, Azure AD/Entra ID, IAM, and Microsoft 365 expertise, plus a bachelor's degree or equivalent experience. Certifications preferred.
Active Directory, Group Policy Objects (GPO), Azure AD/Entra ID, Microsoft 365, PowerShell
1mo
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Senior AWS Cloud Systems Operations Administrator - United States
San Antonio, Texas, United States
OnsiteFull Time
10+ YOETS/SCI clearance required; 10+ years IT/system administration experience with Microsoft and Linux platforms; expertise deploying, managing, and operating AWS workloads, EKS/Kubernetes, and security/compliance; relevant certifications preferred.
AWS Management Console, AWS Command Line Interface (CLI), Kubernetes, EKS, Diode, Lambda, RHEL, STIG, AWS Well-Architected Framework
5d
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Site System Administrator
San Antonio or United States
OnsiteFull Time
5+ YOEBachelor's degree in IT or related field, 5+ years of experience, Secret security clearance, and preferred CompTIA Security+ and ITIL 4 Foundation certifications. Must lift up to 40 pounds and travel up to 10%.
Active Directory (AD), System Center Configuration Manager, Post Administration Tool, Travel Document Issuance System, Passport Records Imaging System Management, Automated Cash Register System, vSphere Installation Bundles (VIBs), Oracle, SQL, ServiceNow
2w
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System Administrator
San Antonio, Texas, United States
OnsiteFull Time
5+ YOE5+ years systems administration experience preferred, bachelor\u0002s in a technical discipline, active security clearance with polygraph, ability to manage UNIX/Windows systems, Tier 1/2 support and troubleshooting.
UNIX, Windows
6d
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System Administrator
San Antonio or Boerne or Austin
FieldFull Time
4+ YOERequires an associate or bachelor's degree or equivalent experience, 4–6 years of IT administration experience, systems and networking expertise, virtualization knowledge, and scripting and automation experience.
Microsoft Windows Server, Active Directory, Azure AD, Microsoft 365, Microsoft Exchange, Microsoft SharePoint, Microsoft OneDrive, Microsoft Teams, Intune, VMware, Hyper-V, IT Glue, Kaseya BMS, Kaseya VSA
1mo
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System Administrator – Journeyman
San Antonio, Texas, United States
$85k-$100k/yr RemoteFull Time
ASM ResearchNYSE: ACN: Provides IT and healthcare services to government agencies.
4+ YOEBachelor's (or equivalent) and 4+ years system administration experience; Windows/Linux server management, monitoring, patching, backups, automation with PowerShell/Bash/Python; active Secret clearance and US citizenship required.
Nagios, Splunk, CloudWatch, PowerShell, Bash, Python, VMware, AWS, Azure, Ansible, Terraform
1w
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Linux System Administrator
San Antonio, Texas, United States
$110k-$190k/yr OnsiteFull Time
10+ YOE10+ years system administration experience, Linux administration, enterprise infrastructure support, strong troubleshooting and communication, ability to work independently in mission-focused environments, TS/SCI with polygraph required.
Linux
2w
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Windows Systems Administrator and Vulnerability Management Coordinator
Kansas City or San Antonio or Idaho Falls
OnsiteFull Time
6+ YOE6+ years experience supporting Windows Server and hybrid cloud environments with PowerShell and Ansible; ability to obtain Public Trust; experience with Active Directory, VMware, Azure, and vulnerability remediation.
VMware vSphere, Azure Monitor, Azure Update Management, Defender for Cloud, Azure VMware Solution (AVS), Microsoft Azure, Active Directory, DNS, DHCP, Group Policy, PowerShell, Ansible, GitLab, Carbon Black, CyberArk, Defender, Remedy, ServiceNow, AWS, GCP
3mo
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Intermediate System Administrator
San Antonio or Fort Meade
OnsiteFull Time
10+ YOE10+ years IT systems administration on Windows and Linux; AWS maintenance; Kubernetes; Docker; Terraform; Helm; Ansible; CI/CD; GitLab; Kustomize; IAT Level II; Security+; CISSP; TS/SCI eligibility
Kubernetes, Docker, AWS, Azure, Google Cloud, Linux, Windows, Helm, Terraform, Ansible, Vault, CI/CD, GitLab, Kustomize
2mo
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Red Hat Linux System Administrator
San Antonio, Texas, United States
OnsiteFull Time
Windows and Linux system administration; hardware/software management; patching and security; accreditation docs OV1-OV3; vulnerability scanning; CLI proficiency.
Red Hat Linux, Windows Server, STIG, SCAP, SIEM, HIDS, NIDS
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