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86 linux administrator jobs at 45 companies in Centennial, CO

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Founding Backend / Infra Engineer
Cupertino, CA, US
$160k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Own the crawlers, pipelines, and infrastructure powering a real-time job search engine. Strong Node.js and Python fundamentals; bonus points for security and reverse-engineering chops.
Node.js, Python, Elasticsearch, Redis
Help us #BeatIndeed & #BeatLinkedIn
1mo
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Linux Administrator II
Westminster, Colorado, United States
$33-$39/hr OnsiteFull Time
CesiumAstro
CesiumAstro: Develops phased array communication systems for satellites and aircraft.
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
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2w
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IT Linux System Administrator 2
Centennial or Cape Canaveral or Decatur or Vandenberg AFB
$82k-$136k/yr OnsiteFull Time
United Launch Alliance
United Launch Alliance: Aerospace providing space launch services for satellites.
2+ YOEBachelor in STEM or equivalent, minimum 2 years related experience, foundational Linux administration (RHEL/Rocky/AlmaLinux/Ubuntu), ability to obtain DoD TS/SCI, US citizenship required, basic networking and troubleshooting skills.
RHEL, Rocky, AlmaLinux, Ubuntu, Bash, Python, Ansible
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1mo
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Sr Principal Linux Systems Administrator - Secret
Boulder, Colorado, United States
$129k-$194k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Develops and manufactures advanced aerospace, defense, and space systems.
6+ YOEMust hold U.S. Secret clearance, meet 8140 IAT Level II (e.g., Security+) requirements, have extensive Linux server administration in a classified environment, cross-platform OS awareness, and meet degree/experience combination listed.
Red Hat Satellite, Ansible, HBSS, PRTG, Splunk, PowerShell, VMware, NFS, Microsoft Windows, Microsoft Active Directory, Cisco, Windows, Solaris, OSX, UNIX
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1mo
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Sr Principal Linux Systems Administrator - Secret
Boulder, Colorado, United States
$129k-$194k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Designs and manufactures advanced aerospace and defense systems.
6+ YOESecret clearance required; IAT Level II (8140) certification (e.g., Security+) required; 6+ years IT experience (Masters) or equivalent; Linux server administration in classified environments; cross-platform OS awareness; Red Hat Satellite and Ansible experience preferred.
Linux, Red Hat Satellite, Ansible, HBSS, PRTG, Splunk, PowerShell, VMware, NFS, Microsoft Active Directory, Windows, Solaris, OSX, UNIX, Cisco
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2w
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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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1mo
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Senior Linux Systems Administrator (TS/SCI with Full Scope Poly Required)
Aurora, Colorado, United States
$150k-$175k/yr OnsiteFull Time
DeNOVO Solutions
DeNOVO Solutions: Provides defense and intelligence technology, software engineering, and cybersecurity services.
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
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1mo
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Cloud and Infrastructure Systems Administrator - Linux admin
Denver, Colorado, United States
$83k-$174k/yr OnsiteFull Time
CACI International
CACI InternationalNYSE: CACI: Provides information technology and engineering services for government agencies.
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
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1mo
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Cloud and Infrastructure Systems Administrator - Linux admin
Denver, Colorado, United States
$83k-$174k/yr OnsiteFull Time
CACI
CACINYSE: CACI: Provides information technology and professional services to government clients.
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
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2mo
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Systems Administrator
Lafayette, Colorado, United States
$120k-$170k/yr OnsiteFull Time
Centil
Centil: Provides engineering and cybersecurity services for national defense missions.
5+ YOE5+ years in Systems Administration; DoD Secret clearance; TS/SCI eligible preferred; Linux/RHEL, virtualization (VMware/Hyper-V), cloud (AWS/Azure), RMF, networking, security
Linux, RHEL, VMware, Hyper-V, AWS, Azure, RMF, Networking
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1mo
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Systems Sr Administrator (IT)
Denver, Colorado, United States
$78k-$119k/yr OnsiteFull Time
DaVita
DaVitaNYSE: DVA: Provides kidney dialysis and integrated chronic disease management services.
Senior UNIX/Linux systems administration in multi-location environments; production support; automation and open source tooling; strong ITIL practices.
Linux, OpenShift, Oracle, DB2, Puppet Enterprise, Confluence
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3w
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Systems Administrator-Cleared
Denver or Folsom
$120k-$165k/yr OnsiteFull Time
Voyager Technologies
Voyager TechnologiesNYSE: VOYG: Provides advanced defense and commercial space technology solutions.
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
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5d
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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+ YOEDoD 8570 IAT Level II certification, active Top Secret/SCI with polygraph, 2+ years IT experience (varies by degree), Linux and Windows administration, Active Directory, virtualization, networking, scripting, and strong troubleshooting skills.
Linux, Windows, Active Directory, Exchange, VMware, Hyper-V, TCP/IP, DHCP, PowerShell, Bash, Python, System Center Configuration Manager, Voice over IP
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2w
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Senior IT Systems Administrator
Broomfield, Colorado, United States
$110k-$175k/yr OnsiteFull Time
Katalyst Space Technologies
Katalyst Space Technologies: Develops robotic spacecraft for in-orbit satellite servicing and maneuvering.
6+ YOE6+ years administering corporate IT systems; strong Microsoft 365/Entra ID, endpoint and SaaS administration; networking fundamentals; Windows/Linux endpoint lifecycle management; scripting (PowerShell, Python, Bash); GitLab and IaC experience.
Microsoft 365, Entra ID (Azure AD), Microsoft Intune, Jamf, Kandji, PowerShell, Python, Bash, GitLab, Infrastructure as Code (IaC), Windows, Linux, TCP/IP, DNS, DHCP, VPN
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3mo
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Systems Administrator - Security
Greenwood Village, Colorado, United States
$95k-$115k/yr OnsiteFull Time
York Space Systems
York Space SystemsNYSE: YSS: Designs and manufactures modular spacecraft platforms and mission solutions.
2+ YOEBachelor’s degree in IT or related field or 5+ years’ related experience; US government contractor experience; Security+; Top Secret clearance; Windows and Linux proficiency; STIG/SCAP experience.
ACAS, Nessus, SCAP, STIGs, DISA, SCAP, MFA, SIEM, Splunk, McAfee HBSS, Windows, Linux, PowerShell, Python, BASH, Networking, Virtualization
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2mo
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Principal Systems Administrator
Aurora, Colorado, United States
OnsiteFull Time
Envision Innovative Solutions
Envision Innovative Solutions: Provides technical engineering and mission support to government agencies.
15+ YOE15 years of Systems Administrator experience; Bachelor's degree or 5 additional years of experience; TS/SCI with Full Scope Polygraph.
UNIX, Windows, Networking
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3mo
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Tier 3 System Administrator – TS/SCI with Polygraph
Aurora, Colorado, United States
$111k-$150k/yr OnsiteFull Time
General Dynamics Information TechnologyNYSE: GD: Provides mission-critical IT services to government and defense organizations.
5+ YOE5+ years of Linux/Windows system administration; TS/SCI with Polygraph; DoD IA certifications; US Citizenship. Bachelor's in Computer Science/Engineering or related field or equivalent experience.
Linux, Windows, Active Directory, DNS, DHCP, LDAP, PowerShell, VMware, SCCM, Outlook, JAVA, ITIL
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1mo
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Senior Database Administrator (Open Rank)
Aurora or Denver or Colorado
$75k-$114k/yr HybridFull Time
University of Colorado
University of Colorado: Public research university providing higher education and healthcare services.
2+ YOEBachelor's in CS/IS/Engineering or equivalent experience; 2+ years Microsoft SQL Server/Azure SQL DBA experience; experience with Azure, Windows/Linux, PL/SQL, CI/CD, Terraform, GitHub, Power BI/Tableau, VMware, data lake/warehouse, and security frameworks (HIPAA, NIST).
Microsoft Azure, Microsoft Azure SQL, Microsoft SQL Server, Microsoft Windows, Microsoft Windows Server, Linux, PL/SQL, CI/CD, GitHub, Terraform, Microsoft Power BI, Tableau, Oracle Database 19c, VMware, Confluence, API, NIST 800-53, NIST 800-171, HIPAA
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1mo
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Systems Administrator
Greenwood Village, Colorado, United States
$80k-$95k/yr HybridFull Time
GrowGeneration
GrowGenerationNASDAQ: GRWG: Retailer of hydroponic and organic gardening supplies and equipment.
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
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2mo
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ITS System Administrator (Lakewood, CO, US)
Lakewood, Colorado, United States
$78k-$98k/yr OnsiteFull Time
Terumo Blood and Cell Technologies
Terumo Blood and Cell TechnologiesTokyo Stock Exchange: 4543: Manufactures medical devices for blood and cell therapy processing.
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
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2mo
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Senior Database Administrator
Hopkins or Atlanta or Chicago or Denver or Irving
$120k-$141k/yr HybridFull Time
U.S. Bank
U.S. BankNYSE: USB: Provider of personal, business, and institutional financial services.
7+ YOEBachelor’s degree or equivalent; 7+ years IT experience; 7+ years design/development of technology infrastructure; Visa sponsorship not available.
NoSQL databases, MongoDB, Cassandra, Elasticsearch, Couchbase, Ansible, Linux, Kubernetes, Cloud
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