273 system administrator jobs at 168 companies in Frederick, CO
2mo
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System Administrator
Fort Collins, Colorado, United States
OnsiteFull Time
8+ YOEBachelor's degree in IT or related field; 8+ years in systems administration; certifications such as CCNA, MCSE, CompTIA Network+, VCP, CISSP; experience with Hyper-V, Azure, AWS, Microsoft 365; cybersecurity and AI tooling experience.
Hyper-V, Microsoft Azure, Amazon Web Services, Microsoft 365, Entra ID, Exchange Online, SharePoint Online, Teams, VPN, Firewall, IDS/IPS, Data encryption, Log monitoring, Scripting (PowerShell)
1d
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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
2mo
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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
2w
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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
2w
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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
3d
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Slingshot Hardware System Administrator
Chippewa Falls or Fort Collins or Spring or Bloomington
$106k-$243k/yr HybridFull Time
4+ YOEBachelor's or Master's degree in Computer Science, Information Systems, or equivalent; 4–6 years as a system or network administrator and lab technician; Linux, networking, scripting, and hardware lab experience.
Linux, LSF, Slurm, Shell, Bash, Python
3d
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Slingshot Hardware System Administrator
Chippewa Falls or Fort Collins or Spring or Bloomington
$106k-$243k/yr HybridFull Time
4+ YOEBachelor's or master's degree in Computer Science, Information Systems, or equivalent; 4–6 years as a system or network administrator and lab technician; Linux, networking, scripting, and hardware lab experience.
Linux, LSF, Slurm, Shell, Bash, Python
3d
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Slingshot Hardware System Administrator
Chippewa Falls or Fort Collins or Spring or Bloomington
$106k-$243k/yr HybridFull Time
4+ YOEBachelor’s or master’s degree in computer science, information systems, or equivalent; 4–6 years as a systems or network administrator or lab technician; Linux, networking, filesystems, scripting, and hardware lab experience.
Linux, LSF, Slurm, Shell, Bash, Python
3w
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System Administrator, Tech Infrastructure
Denver or Saint Petersburg
$60k-$100k/yr HybridFull Time
0.5+ YOETranslate functional specs, document and validate systems, elicit and document user requirements; bachelor’s degree and several months IT experience required.
1w
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System Administrator 3 - Linux / Cloud
Centennial, Colorado, United States
$100k-$166k/yr OnsiteFull Time
4+ YOEBachelor in STEM and 4+ years Linux administration experience; cloud (AWS/Azure), monitoring, patching, backups, scripting (Bash/Python) and troubleshooting; strong communication and operational discipline; must be U.S. Person per ITAR.
AWS, Azure, Bash, Python, Ansible, Terraform, Docker, Kubernetes
4d
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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
2w
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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
3w
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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
1mo
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Sr. System Administrator / TS/SCI / Onsite: CO
Littleton, Colorado, United States
$86k-$151k/yr OnsiteFull Time
3+ YOEActive TS/SCI clearance with CI Poly, U.S. citizenship, DoD 8572-qualified cert (e.g., CompTIA Security+), 3+ years administering Linux and Windows servers, DISA STIGs/security hardening, vulnerability and lifecycle management experience.
Linux, Windows, Ansible, PowerShell, NetApp, Nessus, Trellix, Splunk, ACAS, SCAP, DISA STIGs
5d
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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
2d
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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)
2mo
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ITS System Administrator (Lakewood, CO, US)
Lakewood, Colorado, United States
$78k-$98k/yr OnsiteFull Time
5+ YOE5+ years in systems administration; 2+ years configuring Azure/Office 365; strong Windows Server, virtualization, AD, backups; ITIL knowledge.
Microsoft Windows Server, Active Directory, Azure, Office 365, VMware, SQL, PowerShell, SharePoint, Exchange Online, Linux/Unix
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
3d
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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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Project Administrator
Littleton, Colorado, United States
$25-$35/hr OnsiteFull Time
5+ YOE2-year business or technical trade degree plus 5 years related experience (or equivalent); AP processing, project setup in Dyanmic365, HVAC systems knowledge, strong communication and computer skills.
Dyanmic365
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