135 security administrator jobs at 75 companies in Firestone, CO
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Senior IT Systems & Security Administrator
Denver, Colorado, United States
$100k-$130k/yr OnsiteFull Time
5+ YOE5+ years in systems administration, infrastructure, IT operations, or cybersecurity; bachelor's degree or equivalent; expertise in Microsoft, Azure Government, AWS GovCloud, networking, identity, endpoint security, and compliance.
Microsoft Windows Server, Microsoft 365, Microsoft GCC High, Microsoft Exchange Online, Microsoft SharePoint Online, Microsoft Teams, Microsoft OneDrive, Microsoft Intune, Microsoft Entra ID, Microsoft Azure Government, AWS GovCloud, Active Directory, Group Policy, DNS, DHCP, TCP/IP, VLANs, VPNs, EDR, Microsoft Defender, Microsoft Sentinel, Security Center, AES, RSA, ECC, TLS/SSL, FIPS 140-2/140-3, CMMC, NIST 800-171, FedRAMP, ITAR, DFARS
1mo
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Information Technology Security Administrator
Arvada, Colorado, United States
$115k-$145k/yr OnsiteFull Time
5+ YOE5+ years systems administration with strong IT security experience; U.S. citizenship and active DoD Secret clearance required; experience hardening endpoints, cloud security, IAM, MDM, EDR/SIEM, and vulnerability management.
CIS Benchmarks, DISA STIGs, NIST SP 800-171, NIST 800-37, NIST 800-53, Microsoft 365 GCC High, Google GCP, AWS Gov, Microsoft Intune, EDR, SIEM, CI/CD
1w
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Physical Security System Administrator 1
Boulder, Colorado, United States
$76k-$94k/yr OnsiteFull Time
0+ YOEIAT Level II (e.g., Security+), system administrator experience, Windows patching and vulnerability remediation, basic networking (VLANs/routing), flexible on-site availability including nights/weekends, and proficiency with MS Office and Visio.
CCURE, Lenel, Genetec, Microsoft Excel, Microsoft Word, Visio, PowerPoint
2mo
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Security Specialist - Akamai Security Suite Administrator
Pittsburgh or Strongsville or Denver or Phoenix or Birmingham or Dallas
$65k-$159k/yr OnsiteFull Time
3+ YOE3+ years in network/security or web app administration; experience with Akamai security tools; bachelor's degree in a related field.
Akamai Security Suite, Kona Site Defender, WAF, Bot Manager, DDoS mitigation, Splunk, ELK Stack, Terraform, Ansible, AWS, Azure, GCP, Python, Bash, JavaScript, TCP/IP, DNS
1w
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Physical Security System Administrator 1
Boulder, Colorado, United States
$76k-$94k/yr OnsiteFull Time
0+ YOEExperience administering physical access control, CCTV, PSIM, and endpoint IT systems; tier‑1 helpdesk support; Windows patching; networking basics; IAT Level II (Security+) required; ability to work flexible shifts.
Microsoft Excel, Microsoft Word, Microsoft Visio, Microsoft PowerPoint
1mo
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Sr Systems Security Engineer / Sr. Core Applications Administrator
Lone Tree or Englewood
$143k-$197k/yr HybridFull Time
8+ YOERequires active Top Secret/SCI clearance, bachelor\u0002s degree (or equivalent experience), 8+ years IT/security experience, RHEL/Linux application administration, GitLab/GitHub and JFrog Artifactory administration, DISA STIG/ATO experience, and scripting (Bash; Python/Ansible preferred).
Red Hat Enterprise Linux (RHEL), CentOS, Rocky Linux, RPM/YUM/DNF, systemd, SELinux, firewalld, iptables, Bash, Python, Ansible, Apache Tomcat, JBoss/WildFly, Apache HTTPD, Nginx, JFrog Artifactory, JFrog Xray, GitLab, GitLab CI, GitHub, Jenkins, 3DEXPERIENCE (3DX), Cameo Systems Modeler, Teamwork Cloud (TWC), Jama Connect, Siemens Teamcenter, PostgreSQL, Gitaly, Docker, Kubernetes, OpenShift, LDAP, Kerberos, PAM, SSSD, Flexera/FlexLM, DISA STIG, SAML, SSO
8h
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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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Cybersecurity & Compliance Administrator
Denver, Colorado, United States
$140k-$175k/yr OnsiteFull Time
7+ YOE7+ years in security administration/ops; MS365 security (Purview, Defender); incident response; CMMC/NIST; strong communication; US eligibility.
Microsoft Purview, Microsoft Defender, Microsoft 365, SIEM, EAC/Zero Trust, MFA
1w
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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
2w
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Senior IT Administrator
Westminster, Colorado, United States
$94k-$112k/yr OnsiteFull Time
5+ YOE5+ years IT support/systems administration, BS preferred, strong AD/Azure AD/Entra ID, Microsoft 365 and AWS experience, Intune/MDM, endpoint security, advanced troubleshooting, and documentation skills.
Microsoft Outlook, Microsoft Teams, Microsoft SharePoint, Microsoft OneDrive, Microsoft Purview, Microsoft Entra ID, Active Directory, Intune, MDM, AWS, VPN
1w
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Unix Administrator
Denver, Colorado, United States
OnsiteFull Time
Manage, configure, tune, and secure large-scale Redhat/Oracle Linux systems; perform installations, patching, disaster recovery, and collaborate with security teams.
Redhat, Oracle Linux, RHEL, VMware, KVM, Microsoft Azure, Redhat Satellite, Shell
1w
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Systems Administrator II
Broomfield, Colorado, United States
$79k-$135k/yr OnsiteFull Time
2+ YOEBachelor's degree or equivalent experience, 2+ years systems administration, CompTIA Security+/DoD 8570 IAT II, Active Directory, VMware, endpoint hardening, STIG/RMF familiarity, TS/SCI eligible.
Active Directory, VMware, PowerShell, Python, Bash, RHEL, Windows
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Senior Network Administrator
Denver, Colorado, United States
$125k-$146k/yr HybridFull Time
10+ YOEDesign, implement, and manage Cisco-based network infrastructure; 10+ years network administration experience; CCNP or 5+ yrs equivalent; strong TCP/IP, OSPF/BGP, security, Microsoft Terminal Services skills.
Cisco, Microsoft Terminal Services, Gateway Broker, RD Web
2mo
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Site Security Manager, USARC DEERS/RAPIDS
Hoover or Pago Pago or Los Alamitos or Los Angeles or Mountain View or Aurora or Orlando or Fort Gillem or Fort Shafter or Darien or Arlington Heights or Forest Park or Fort Knox or Devens or Livonia or Saipan or Vicksburg or Charlotte or Fort Bragg or Londonderry or Fort Totten or Rochester or Williamsport or Johnstown or Moon Township or Fort Buchanan or Greenville or Grand Prairie or Houston or Salt Lake City or Abingdon or Marysville or Vancouver
OnsiteFull Time
1+ YOEHigh school diploma and 1 year customer service experience; proficient in MS Office; RAPIDS certification required; administrative and security duties.
Microsoft Word, Outlook, RAPIDS, scanners, copiers, keyboard, mouse
2w
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Systems Administrator - Level 4
Aurora, Colorado, United States
$129k-$194k/yr OnsiteFull Time
8+ YOEActive DoD TS/SCI clearance, RHEL server administration, VMware experience, DoD 8570 IAT Level II (e.g., Security+ CE) required or obtainable, ability to lift 40 lbs, bachelor's-level experience preferred.
RHEL, VMware, Active Directory, Linux, UNIX, Windows Server
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
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
2mo
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Systems Administrator
Tacoma or Aurora or San Antonio or Falls Church
OnsiteFull Time
8+ YOEU.S. citizen required; active IAT II and related Computing Environment (CE) certifications; 8+ years mobile application experience; 4-year degree in IT/math or equivalent; experience with secure DoD web development and leading teams.
HTML, CSS, JavaScript, React, Angular, Vue, Active Server Pages (ASP.NET), C#, Sitecore Content Management System (CMS), SQL, Jira, MVC5, PWAs
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Database Administrator IV
Denver or United States
$117k-$140k/yr RemoteFull Time
7+ YOESeven or more years administering enterprise databases; expertise in SQL, database architecture, security, performance, recovery, AWS services, Windows/Linux, automation, and production troubleshooting.
IBM Db2, Microsoft SQL Server, PostgreSQL, MySQL, MongoDB, SQL, Amazon RDS, Amazon Aurora, Amazon Redshift, PowerShell, Python, Bash, Windows, Linux, DevOps, Infrastructure as Code (IaC), CI/CD
2w
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Systems Administrator - Level 2 or 3
Aurora, Colorado, United States
$83k-$155k/yr OnsiteFull Time
2+ YOEActive DoD TS/SCI clearance, RHEL server administration, VMware and virtualization experience, DoD 8570 IAT Level II (e.g., Security+ CE) or ability to obtain, ability to lift 40 lbs, 2+ years server admin experience preferred.
RHEL, Linux, UNIX, VMware, Active Directory
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