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285 system administrator jobs at 177 companies in Arvada, CO

1w
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System Administrator
Aurora or Texas
$130k-$165k/yr OnsiteFull Time
Innovative Signal Analysis
Innovative Signal Analysis: Provider of real-time signal and image processing systems.
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
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3mo
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System Administrator III
Denver, Colorado, United States
HybridFull Time
Onward Energy
Onward Energy: Operates utility-scale wind, solar, and natural gas power plants.
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
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3w
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System Administrator
Aurora, Colorado, United States
$62k-$141k/yr OnsiteFull Time
Booz Allen Hamilton
Booz Allen HamiltonNYSE: BAH: Provides technology and management consulting services to diverse organizations.
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
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3w
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System Administrator
Aurora, Colorado, United States
$62k-$141k/yr OnsiteFull Time
Booz Allen Hamilton
Booz Allen HamiltonNYSE: BAH: Consulting and technology services for government and commercial clients
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
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4d
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System Administrator for Linux
Aurora, Colorado, United States
$125k-$140k/yr OnsiteFull Time
DCCA
DCCA: Provides IT and engineering solutions for government and defense agencies.
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
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1w
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Principal Linux System Administrator
Aurora, Colorado, United States
$149k-$184k/yr OnsiteFull Time
SciTec
SciTec: Provides advanced remote sensing and missile defense technology solutions.
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
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3w
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System Administrator / Tier II Support
Greenwood Village, Colorado, United States
$69k-$120k/yr HybridFull Time
Arcfield
Arcfield: Systems engineering and mission support for defense and space.
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
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4w
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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
KPMG
KPMG: Global professional services network providing audit, tax, and advisory.
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
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1w
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Principal System Administrator- Must have a TS/SCI active clearance!
Aurora, Colorado, United States
$87k-$165k/yr OnsiteFull Time
RTX
RTXNYSE: RTX: RTX provides advanced aerospace and defense systems and services.
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
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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
Lockheed Martin
Lockheed MartinNYSE: LMT: Designs and manufactures advanced aerospace, defense, and security systems.
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
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1mo
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Staff Linux System Administrator, TS/SCI / Onsite: CO
Littleton, Colorado, United States
$105k-$184k/yr OnsiteFull Time
Lockheed Martin
Lockheed MartinNYSE: LMT: Designs and manufactures global security and aerospace systems.
5+ YOEActive TS/SCI with CI poly, U.S. citizenship, DoD 8572 (e.g., Security+), 5+ years RHEL administration, scripting/automation (Ansible, Python, Bash, PowerShell), DISA STIGs and security hardening experience.
Red Hat Enterprise Linux, Ansible, Python, Bash, PowerShell, DISA STIGs, Nessus, Trellix, Splunk, ACAS, SCAP, NetApp
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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
Halogen Engineering Group
Halogen Engineering Group: Provides specialized engineering, cybersecurity, and program management services.
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)
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1w
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Network System Admin
Boulder, Colorado, United States
RemoteContract
Delan Associates
Delan Associates: Provides engineering and professional services to government agencies.
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)
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2d
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IT System Administrator
Westminster, Colorado, United States
$71k-$90k/yr OnsiteFull Time
GeoStabilization International
GeoStabilization International: Provides emergency geohazard mitigation and slope stabilization construction services.
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
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2mo
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System Administrator/Cloud Engineer - Aurora, CO or Meridian, CO
Aurora or Meridian
$90k-$237k/yr OnsiteFull Time
ICR
ICR: Provides IT and security services
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
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1w
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Project Administrator
Denver, Colorado, United States
$45k-$83k/yr HybridFull Time
Trane Technologies
Trane TechnologiesNYSE: TT: Global provider of heating, ventilation, and air conditioning solutions.
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
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1w
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Systems Administrator
Aurora, Colorado, United States
$128k-$214k/yr OnsiteFull Time
ManTech
ManTech: Provides technology solutions for defense and intelligence agencies.
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
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1w
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Sr. Systems Administrator
Denver, Colorado, United States
$136k-$166k/yr OnsiteFull Time
Boeing Intelligence & Analytics
Boeing Intelligence & AnalyticsNYSE: BA: Delivers intelligence, analytics, and cyber solutions for national security.
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
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3w
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Office Administrator - UniFirst
Aurora, Colorado, United States
OnsiteFull Time
UniFirst
UniFirstNYSE: UNF: Provides uniform rental, laundering, and facility service solutions.
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
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2w
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Office Administrator - UniFirst
Aurora, Colorado, United States
$53k-$73k/yr OnsiteFull Time
UniFirst
UniFirstNYSE: UNF: Provides uniform rental, workwear, and facility service solutions.
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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