124 linux systems administrator jobs at 61 companies in Castle Pines, CO
2mo
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Linux Administrator II
Westminster, Colorado, United States
$33-$39/hr OnsiteFull Time
2+ YOEBachelor's degree in a technical discipline with 2+ years Linux systems administration; networking fundamentals (TCP/IP, DNS, DHCP, VLANs), cybersecurity best practices, troubleshooting, operational readiness, and strong cross-team communication.
Linux, TCP/IP, DNS, DHCP, VLANs, firewalls
1w
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Linux / AWS Systems Administrator
Denver, Colorado, United States
$110k-$160k/yr OnsiteFull Time
5+ YOEBachelor's degree in computer science, information technology, or related field; 5+ years of Linux administration and network troubleshooting experience; active TS/SCI clearance and DoD 8570 IAT Level II certification required.
Linux, AWS, Nutanix, IPA, Puppet, Kubernetes, Ansible, CompTIA Security+, Linux Command Line
4w
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Sr Linux Administrator
Centennial or Louisville
$136k-$187k/yr OnsiteFull Time
8+ YOEBachelor's or equivalent, typically 8+ years related experience, 3+ years cloud experience (AWS/Azure), advanced systems administration, security, scripting/automation, and leadership/mentoring skills.
AWS, Azure, Docker, Kubernetes, Jenkins, Ansible, Puppet, Chef
3mo
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Cloud and Infrastructure Systems Administrator - Linux admin
Denver, Colorado, United States
$83k-$174k/yr OnsiteFull Time
7+ YOETS/SCI with Polygraph required; DoD 8570 IAT Level II (Security+ or CISSP) required or must obtain; Bachelor’s degree in CS/IT; ~7 years Linux system administration and network troubleshooting; cloud (AWS), DevOps, Puppet/IPA/Kubernetes/Ansible experience preferred.
Linux, Nutanix, AWS, IPA, Puppet, Kubernetes, Ansible
3w
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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
2mo
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Senior Systems Administrator
Colorado Springs, Colorado, United States
$90k-$120k/yr OnsiteFull Time
2+ YOEActive DoD Secret or Top Secret clearance, 2+ years systems administration experience, Linux and Active Directory administration, automation with Ansible/Terraform/Docker/Kubernetes, AWS familiarity, CompTIA Security+ required; Confluence and Jira experience.
Active Directory, Ansible, AWS, Confluence, Docker, Jira, Kubernetes, Linux, Packer, Terraform
3mo
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Senior Linux Systems Administrator (TS/SCI with Full Scope Poly Required)
Aurora, Colorado, United States
$150k-$175k/yr OnsiteFull Time
15+ YOEActive TS/SCI with Full-Scope Poly, 15+ years DoD/IC or private sector experience, BS in a technical field, Security+ or higher/IAT2, AWS and Linux expertise, scripting, Jira/Confluence.
AWS, Linux, Jira, Confluence, Scripting
1d
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Systems Administrator II
Aurora or Aurora
$70k-$75k/yr OnsiteFull Time
Bachelor's degree or equivalent experience, 2–6 years in systems administration, Windows/Linux, virtualization, networking, DoD security compliance, Secret clearance, and IAT-Level II certification or higher.
Windows, Linux, VMware, Hyper-V, TCP/IP, DNS, DHCP, DISA STIGs, RMF, CompTIA Security+
2w
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Systems Administrator Senior
Colorado Springs, Colorado, United States
$135k-$165k/yr OnsiteFull Time
10+ YOERequires 10+ years and a master's, 18+ years and a bachelor's, or 25+ years and an associate degree; Top Secret with SCI eligibility; cybersecurity or systems administration certification; Linux, networking, virtualization, automation, and scripting expertise.
Linux, Red Hat Enterprise Linux (RHEL), Microsoft Windows, Ansible, YAML, CISCO, Bash, Python, Local Area Network (LAN), Wide Area Network (WAN)
2mo
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Systems Administrator-Cleared
Denver or Folsom
$120k-$165k/yr OnsiteFull Time
3+ YOEActive TS/SCI required, 3+ years systems administration experience; manage Microsoft 365/Azure, Intune, Okta, AD, Windows/Linux servers, virtualization, Fortinet networking, and scripting (PowerShell/Bash/Python).
Microsoft 365, Microsoft Azure, Microsoft Intune, Okta, Microsoft Entra ID, Microsoft Exchange Online, Microsoft Teams, Microsoft SharePoint, Microsoft Defender, Windows Server, Linux, Ubuntu, RHEL, CentOS, VMware vSphere, Hyper-V, Fortinet, FortiGate, FortiSwitch, FortiClient, Active Directory, PowerShell, Bash, Python, ServiceNow, Jira Service Management
1mo
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GCCS Systems Administrator
Colorado Springs, Colorado, United States
OnsiteFull Time
5+ YOERequires Top Secret/SCI clearance, GCCS-J experience or 5+ years Windows/Linux systems administration, BS (or equivalent), VMware, Microsoft Active Directory, DoD 8570 IAT Level II certification, and ability to travel up to 50%.
GCCS-J, Windows, Linux, VMware, Microsoft Active Directory (AD), Microsoft Operating Systems, Oracle, Sybase, Postgress, Tomcat, JBoss, NFS, SSH, NTP, LDAP, HTTP, Ansible
3mo
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Cloud and Infrastructure Systems Administrator - Linux admin
Denver, Colorado, United States
$83k-$174k/yr OnsiteFull Time
7+ YOEDoD 8570 IAT Level II (Security+ or CISSP) or willingness to obtain; BS in CS/IT; 7+ years Linux server/desktop administration and network troubleshooting; DevOps knowledge; willingness to learn.
Linux, AWS, Puppet, IPA, Kubernetes, Ansible, Scripting
1w
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Linux System Administration, Senior - Linux Space Systems Support
Westminster or United States
$97k-$165k/yr OnsiteFull Time
4+ YOEBachelor's degree and 4+ years of related experience, or high school diploma and 8+ years. Requires active TS/SCI polygraph clearance, Security+, RHCSA, and 4+ years administering Red Hat Enterprise Linux.
Linux, Ansible Automation, Terraform, Puppet, Chef, VMware, AWS, Microsoft Azure, Podman, Docker, Kubernetes, Python, Ruby, Bash, JavaScript, Git, GitLab, GitOps, DevOps, CI/CD, Red Hat Enterprise Linux
1w
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Associate Systems Administrator
Aurora or United States
$69k-$104k/yr OnsiteFull Time
Bachelor's degree or four years' related experience, Linux/RHEL administration familiarity, ability to obtain Top Secret/SCI clearance and DoD 8570 IAT Level II certification.
Linux, Red Hat Enterprise Linux (RHEL), VMware, Active Directory, UNIX, Windows Server
2w
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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
1w
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Systems Administrator (AHT)
Aurora, Colorado, United States
$92k-$138k/yr OnsiteFull Time
2+ YOEBachelor's degree and 2 years of IT experience; Linux and Windows server administration, VMware, NAS storage, Top Secret clearance, Full Scope Polygraph, and DoD 8570 IAT Level 2 certification required.
Linux, Windows, VMware, NAS Storage, NetApp, ONTAP, Red Hat Enterprise Linux (RHEL), Windows 10, Windows Server, Group Policies (GPOs), Active Directory, Microsoft SharePoint, Splunk, Tenable, Nessus, ESXi, iptables, Wiki
2mo
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Systems Administrator
Greenwood Village, Colorado, United States
$80k-$95k/yr HybridFull Time
3+ YOE3+ years systems admin/support experience with server, network, and cloud operations; experience with Windows AD, GPO, PowerShell, Intune/MDM, API tooling, disaster recovery, documentation, and stakeholder communication. Relevant certifications preferred.
Windows AD, GPO, PowerShell, API, MDM, Microsoft Intune, Linux
2w
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Systems Administrator Senior
Colorado Springs, Colorado, United States
$135k-$165k/yr OnsiteFull Time
10+ YOERequires 10+ years and a master's, 18+ years and a bachelor's, or 25+ years and an associate's degree; Linux/RHEL, Windows, Ansible, networking, cybersecurity, scripting, DoD policy, and TS/SCI eligibility.
Linux, RHEL, Microsoft Windows, Ansible, YAML, CISCO, Bash, Python, Local Area Network (LAN), Wide Area Network (WAN), Risk Management Framework, RBAC, STIG, COMSEC, AWS Cloud
21h
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Systems Administrator (COSA)
Schriever AFB or Colorado Springs
$100k-$120k/yr OnsiteFull Time
1+ YOEActive Secret clearance, IAT Level II certification, U.S. citizenship, and 1 year of experience with a STEM bachelor's degree. Requires UNIX, Linux, Windows, Cisco, Juniper, networking, troubleshooting, and Microsoft Office proficiency.
UNIX, Linux, Windows, Cisco, Juniper, Microsoft Word, Microsoft Excel, Microsoft PowerPoint
1w
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Satellite Systems Administrator
Schriever Air Force Base, Colorado, United States
$107k-$183k/yr OnsiteFull Time
5+ YOEBachelor's degree in a technical field and 5+ years relevant experience, or 9+ years without a degree; satellite operations experience; Linux/UNIX administration; Microsoft Server protocols; DoD 8570 IAT Level II; TS/SCI eligibility.
Linux, UNIX, VMware, Microsoft Server, Windows, firewalls, routers, switches
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