Senior Linux Administrator

Centum Insight LLC; San Antonio (TX); On-site; USD 90,000 - 120,000; Full time

Job summary

A technology consulting company located in San Antonio, United States, is seeking a Senior Linux Administrator. In this role, you will manage and secure Linux-based systems, implement security guidelines, and respond to vulnerability threats. Candidates must possess extensive experience in Linux server administration, particularly with RedHat, and demonstrate proficiency in scripting for automation. The position requires strong communication skills and the ability to work both independently and collaboratively. Competitive compensation and opportunities for growth are provided.

Qualifications

• 8+ years of experience in Linux System Security, applying updates and remediating vulnerabilities.
• Experience with multiple Linux OS versions, including RedHat, Ubuntu, and CentOS.

Responsibilities

• Mitigate vulnerabilities on Linux-based systems.
• Implement STIGs and address POAMs.
• Perform standard Linux administration duties.
• Create software/scripts to automate production systems.

Skills

RedHat Linux server administration

Vulnerability remediation

Scripting (Bash, Perl, Ruby, Python)

Communication skills

Attention to detail

Education

Bachelor's degree in a related field

Job description

San Antonio, United States | Posted on 01/29/2026

In this role, you will work with other members to mitigate vulnerabilities on Linux-based systems, implement STIGs, address POAMs, and mitigate Zero-Day vulnerabilities. Other standard Linux administration duties will be included in this role.

• Senior-level RedHat Linux server administration experience, experience with other Linux OS versions desired, such as Ubuntu and CentOS
  
• Experience maintaining and administering a RedHat Satellite server
  
• A good understanding of system administration tasks, package management (RPM, Yum) modules building process, and deployment
  
• Experience implementing logging solutions
  
• Experience with vulnerability remediation
  
• Experience in creating software/scripts to automate production systems with fluency in at least one of the following: Bash, Perl, Ruby, Python - appropriate use of built-in functions and libraries
  
• Advanced Linux System Administration, Configuration, and System Security
  
• Advanced systems troubleshooting skills
  
• Excellent written and verbal communication skills
  
• Strong attention to detail and problem-solving skills
  
• Able to work independently as well as in a team
  

Qualifications

Bachelor's with 8+ years Linux System Security, applying updates and remediating vulnerabilities (or commensurate experience)