Senior System Administrator (DISA) – Secret Clearance – Remote

Linuxconfig; Northern (KY); Hybrid; USD 110,000 - 160,000; Full time

Benefits offered by this job

Healthcare package

401k with match

Educational assistance

Student loan repayment

Paid time off

Dynamic, cross-functional team

Job summary

Horizon Industries Limited is seeking a Senior System Administrator/Developer to own system administration for the IDEAS application, ensuring patching, security, and compliance across staging and production environments. The role requires Secret clearance and experience with RHEL, WebLogic, Appian, and DoD RMF processes.

As a key personnel, you will coordinate with the DBA and ISSO, manage PKI certificates, automate log inspection with Splunk, and drive security patching and CSIRT-like tasks in

Qualifications

• 10+ years IT experience, including 5+ years administering RHEL in production.
• 5+ years administering Oracle WebLogic Server.
• Experience patching, tuning, and securing Apache HTTP and Java applications.
• Hands-on DISA STIG implementation, ACAS remediation, and IAVA compliance in a DoD RMF environment.
• DoD PKI and SSL/TLS certificate management.
• Bash scripting for automation, and Splunk or a comparable log analysis tool.
• Experience working through formal change control in a government-hosted environment.
• Experience on at least two projects in a large organization administering, operating, maintaining, and securing a large-scale application.

Responsibilities

• Own execution of system administration for IDEAS as Key Personnel, directing System Administrator support and coordinating with the Database Administrator and ISSO.
• Administer RHEL, Apache HTTP, Oracle Java, and Oracle WebLogic in the Performance, Staging, and Development environments, including system builds and decommissions, user accounts, security groups, and file permissions.
• In Staging and Production, administer application-layer components (Appian, Oracle applications, WebLogic) and submit Enterprise Change Requests to the Change Advisory Board and DISA OS, database, and web administration groups.
• Test and document security patches for RHEL, Apache, Appian, Java, WebLogic, Oracle Service Bus, Tomcat, and ANT in lower environments using automated scripts, and schedule production deployment through the hosting provider’s Application Service Interruption process.
• Serve as the named alternate to the ISSO for STIG checklist reviews, ACAS and HBSS findings, IAVA remediation, and POA&M inputs.
• Manage the DoD PKI certificate lifecycle, including certificate signing requests, installation, expiration tracking, Certificate Revocation List updates, and removal of expired or revoked certificates.
• Automate log inspection with shell scripting and Splunk, and produce ranked 'worst actor' risk and trend reports.
• Keep server application components within two releases of the vendor baseline.
• Produce and maintain System Administration documentation, SOPs, System Security Plan inputs, system diagrams, administration and troubleshooting guides, and lists of critical services.
• Support the base-year effort to achieve and maintain Authority to Operate.

Skills

10+ years IT experience

5+ years Red Hat Enterprise Linux

5+ years Oracle WebLogic

Bash scripting

DISA STIG implementation

ACAS remediation

IAVA compliance

DoD RMF awareness

PKI and SSL/TLS management

Change control in government env

Tools

Appian

Oracle Java

Oracle WebLogic

RHEL

Apache HTTP

Tomcat

Oracle Service Bus

Splunk

DISA Stratus cloud

HBSS

Job description

Horizon Industries Limited is seeking a Senior System Administrator/Developer to own system administration for the IDEAS application, ensuring patching, security, and compliance across staging and production environments. The role requires Secret clearance and experience with RHEL, WebLogic, Appian, and DoD RMF processes.

As a key personnel, you will coordinate with the DBA and ISSO, manage PKI certificates, automate log inspection with Splunk, and drive security patching and CSIRT-like tasks in