277 system administrator jobs at 175 companies in Westminster, CO
15h
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System Administrator
Greenwood Village, Colorado, United States
$32-$35/hr HybridFull Time
Requires tier I–III technical support experience, hardware and software troubleshooting, systems administration, customer service, documentation, and knowledge of cloud, virtualization, networking, security, and Microsoft environments.
Microsoft Windows Server, Microsoft Windows, Microsoft SQL Server, Microsoft Exchange, Microsoft Hyper-V, Microsoft Remote Desktop Services (RDS), Active Directory, DNS, DHCP, VMware ESXi, Veeam Backup & Replication, Barracuda, Avanan, Checkpoint, Azure, Google Cloud Platform (GCP), Amazon Web Services (AWS), Cisco Meraki, SonicWall, Simple Network Management Protocol (SNMP), Management Information Base (MIB), Intrusion Detection System (IDS), Intrusion Prevention System (IPS), Access Control List (ACL), 802.1x, 802.11a/b/g/n, WPA2, Wireless LAN Controller (WLC), Wireless Access Point (WAP), Cisco AnyConnect, macOS, Citrix, Microsoft 365, Microsoft Intune, Microsoft SharePoint, Microsoft Exchange Online, Microsoft Entra, ConnectWise PSA, ScreenConnect, Microsoft Office, SentinelOne, 3CX, ADP My Learning, Pluralsight, Culture Index Survey
1w
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System Administrator
Aurora or Texas
$130k-$165k/yr OnsiteFull Time
Active TS/SCI clearance with CI polygraph, hands-on Windows and Linux administration, infrastructure troubleshooting, networking, virtualization, automation, security, and onsite Colorado work.
Windows, Linux, Windows 11, Windows Server 2022, Red Hat Enterprise Linux 8/9, Microsoft 365, Active Directory, Group Policy, DNS, DHCP, Exchange, WSUS, Kickstart, Bash, PowerShell, Git, Ansible, Terraform, Packer, GitLab, CI/CD, Nexus, Podman, Kubernetes, RKE2, K3s, Trident, Cisco Catalyst, Cisco Nexus, Palo Alto, Cisco VoIP, NetApp, Synology, Pure Storage, Veeam, Grafana, Prometheus, SolarWinds, Elastic Stack, Splunk, Nessus, Trellix, SCAP, CMMC
3mo
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System Administrator III
Denver, Colorado, United States
HybridFull Time
7+ YOE7+ years system administration experience with Windows Server, Active Directory, virtualization, Azure, Microsoft 365, Intune, Hyper-V and strong troubleshooting and documentation skills.
Active Directory, Group Policy, DNS, DHCP, Microsoft Azure, Microsoft 365, Office 365, Entra, Exchange Online, SharePoint Online, Teams, Intune, Hyper-V, SAML, SCADA, PowerShell, Azure CLI
3w
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System Administrator
Aurora, Colorado, United States
$62k-$141k/yr OnsiteFull Time
Experience administering Windows Server 2022, VMware/vSphere, Active Directory and Group Policy in secure/classified environments; DoD 8570 IAT Level II or equivalent; TS/SCI with polygraph required; strong troubleshooting and networking skills.
Windows Server 2022, VMware, vSphere 8, Microsoft Active Directory, Microsoft Group Policy, Splunk, McAfee ePolicy Orchestrator (ePO), Microsoft PowerShell, RHEL 8, RHEL 9, STIGs
3w
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System Administrator
Aurora, Colorado, United States
$62k-$141k/yr OnsiteFull Time
Administer Windows Server 2022, VMware/vSphere, Active Directory, Group Policy; support classified networks; troubleshoot networking; TS/SCI with polygraph and DoD 8570 IAT Level II (e.g., Security+ CE).
Windows Server 2022, VMware, vSphere 8, Active Directory, Group Policy, Splunk, McAfee ePolicy Orchestrator (ePO), Domain Controller, PowerShell, RHEL 8, RHEL 9
5d
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System Administrator for Linux
Aurora, Colorado, United States
$125k-$140k/yr OnsiteFull Time
3+ YOEBachelor's degree in computer science or related field, or 10 years equivalent experience; 5 years as an OS administrator, including 3 years in Linux and operations support. US citizenship, clearance eligibility, and Security+ within 6 months required.
Linux, Windows, AWS, Bash, Perl, Python, Ansible, Puppet, SELinux, EC2
1w
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Principal Linux System Administrator
Aurora, Colorado, United States
$149k-$184k/yr OnsiteFull Time
8+ YOE8+ years administering Linux (RHEL) with Top Secret clearance, experience in system hardening (STIG/SCAP), virtualization, patch management, networking, troubleshooting, and automation/scripting.
Red Hat Enterprise Linux (RHEL), RHEL 8, RHEL 9, RHEL 10, VMware, VMware vSphere, Podman, Docker, Red Hat OpenShift, Kubernetes, minikube, Image registries, PyPI, Ansible, Bash, Python, Git, GitLab, CI/CD, DISA SCAP Compliance Checker, DISA STIG, Dell servers, SAN
3w
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System Administrator / Tier II Support
Greenwood Village, Colorado, United States
$69k-$120k/yr HybridFull Time
2+ YOEMust maintain active TS/SCI with polygraph, DoD 8570 IAT Level II (e.g., Sec+, CISSP), 2+ years relevant experience (varies by degree), Windows, Active Directory, virtualization, networking, scripting, and Linux skills.
Windows, Active Directory, Exchange, VMware, Hyper-V, TCP/IP, DHCP, PowerShell, Bash, Python, Linux, Voice over IP, Microsoft On-Premise Software Center Configuration Management
1mo
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Senior Associate, ServiceNow - Certified System Administrator
Irvine or Los Angeles or San Francisco or Denver or Washington or Tampa or Atlanta or Chicago or Boston or St Louis or Short Hills or New York City or Philadelphia or Austin or Dallas or Houston or Seattle
$94k-$203k/yr OnsiteFull Time
3+ YOE3+ years managing enterprise systems with ServiceNow focusing on ITSM/ITOM/IRM, ServiceNow CSA required, JavaScript customization skills, agile delivery and team leadership experience.
ServiceNow, JavaScript
1w
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Principal System Administrator- Must have a TS/SCI active clearance!
Aurora, Colorado, United States
$87k-$165k/yr OnsiteFull Time
5+ YOEActive transferable TS/SCI clearance and U.S. citizenship, Bachelor+5yrs (or advanced+3yrs), Windows and RHEL administration, VMware virtualization, STIG/SCAP compliance, DoDD 8140/8570 certification within 6 months.
Windows Server, Windows 11, RHEL 7, RHEL 8, RHEL 9, VMware ESXi, vCenter, SCAP, ACAS, Splunk, STIG Viewer, Active Directory, Group Policy
1d
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Classified IT System Administrator, Sr / Onsite: PA, CO, CA, AL or FL
King of Prussia or Huntsville or Littleton or Sunnyvale or Titusville
$96k-$178k/yr OnsiteFull Time
3+ YOERequires U.S. citizenship, ability to obtain Top Secret clearance, and 3+ years of system administration experience with Linux, Windows, networking, or storage. Requires systems analysis, troubleshooting, networking, and communication skills.
Linux, Windows, VMware, KVM, NetApp, Active Directory, Ansible, Python, Bash, PowerShell, SSL/TLS
2d
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SYSTEM ADMINISTRATOR – Linux - 15+ yrs of exp - TS/SCI w/Poly clearance is required- RC - 310
Aurora, Colorado, United States
$202k-$214k/yr OnsiteFull Time
15+ YOERequires 15 years of system administration experience and a technical bachelor's degree, with five additional years of experience substituting for the degree. Current TS/SCI clearance and polygraph required.
Linux, UNIX, Windows, Cisco, Service Oriented Architecture (SOA)
1w
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Network System Admin
Boulder, Colorado, United States
RemoteContract
3+ YOERequires 3–5 or more years of network systems administration experience, including routing, switching, troubleshooting, security, infrastructure, load balancing, VPNs, and cloud management.
TCP/IP, Virtual Private Networks (VPN), Wide Area Networks, Network Switches, Local Area Networks, Border Gateway Protocol, Dynamic Host Configuration Protocol (DHCP), Load Balancing, Proxy Servers, Open Shortest Path First (OSPF), Internet Protocol Security (IP SEC)
3d
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IT System Administrator
Westminster, Colorado, United States
$71k-$90k/yr OnsiteFull Time
Associate's or bachelor's degree in a related field or equivalent experience; Windows Server, cloud, Azure, Active Directory, networking, virtualization, backup, troubleshooting, and security knowledge required.
Windows Server, Azure, Active Directory, Group Policy, DNS, DHCP, Microsoft Exchange, MDM, Microsoft Intune, VMware, Hyper-V, TCP/IP, VLANs, Aruba, Dell, HP, FortiGate, Veeam, SolarWinds, Microsoft Azure, AWS, Google Cloud, PowerShell, Azure AD/Entra ID
2mo
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System Administrator/Cloud Engineer - Aurora, CO or Meridian, CO
Aurora or Meridian
$90k-$237k/yr OnsiteFull Time
3+ YOETop Secret/SCI eligibility required; Kubernetes (K3s) experience; Linux admin; AWS Snowball Edge/Outpost; 3+ years system admin; DevSecOps pipelines; network protocols.
Kubernetes, AWS Snowball Edge, AWS Outpost, Linux, Bash, Python, Git, Ansible, Ingress controllers, Proxy server administration, NPE Certificate Management
1w
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Project Administrator
Denver, Colorado, United States
$45k-$83k/yr HybridFull Time
0+ YOEHigh school diploma or GED and up to two years of related experience or training. Requires communication, problem-solving, prioritization, basic accounting, and financial systems experience.
HVAC, BAS
1w
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Systems Administrator
Aurora, Colorado, United States
$128k-$214k/yr OnsiteFull Time
15+ YOEBachelor's degree in a technical discipline or 5 additional years of experience; 15+ years in systems administration or related IT; RHEL experience; TS/SCI with polygraph required.
Red Hat Enterprise Linux (RHEL), Microsoft Windows, AWS
1w
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Sr. Systems Administrator
Denver, Colorado, United States
$136k-$166k/yr OnsiteFull Time
10+ YOERequires 10 years of systems administration experience or equivalent education, TS/SCI with active CI polygraph, systems and network expertise, operating systems knowledge, ITSM experience, and leadership abilities.
Windows, macOS, Linux, ITSM, Active Directory, ServiceNow, Remedy, Jira Service Management, CompTIA Server+, Microsoft Certified Systems Administrator, Red Hat Certified System Administrator
3w
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Office Administrator - UniFirst
Aurora, Colorado, United States
OnsiteFull Time
2+ YOE2-year degree or equivalent experience preferred, 2 years management experience preferred, strong communication, people management, data entry, payroll and HR support skills, proficiency in Microsoft Office and UniFirst systems.
Microsoft Word, Microsoft Excel, Microsoft Powerpoint, Microsoft Access, UniFirst Account Management System
3w
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Office Administrator - UniFirst
Aurora, Colorado, United States
$53k-$73k/yr OnsiteFull Time
Prefer two-year degree and ~2 years management experience; strong communication, people-management, payroll/HR support, data entry, customer service, and proficiency with Microsoft Word, Excel, PowerPoint, Access and UniFirst systems.
Microsoft Word, Microsoft Excel, PowerPoint, Access, UniFirst Account Management System
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