Senior Linux Administrator — Greater Houston

Position Overview

We are seeking a highly skilled and experienced Sr. Linux Administrator to support a

hybrid IT environment serving both commercial and government maritime operations.

The ideal candidate will have deep hands-on experience with OEL/RHEL Linux

administration, system hardening, automation, patching, and troubleshooting in secure

and standardized environments. This role is focused on maintaining reliable, secure, and

compliant Linux infrastructure across on-premises and hybrid environments.

Key Responsibilities

• Administer, monitor, and support enterprise Linux servers across on-premises and

hybrid environments.

• Perform system installation, configuration, hardening, patching, and lifecycle

management for OEL/RHEL systems.

• Troubleshoot complex Linux performance, availability, authentication, storage,

and connectivity issues.

• Support virtualization, storage, and infrastructure dependencies as they relate to

Linux platforms.

• Implement and maintain automation scripts and tools to improve operational

efficiency and standardization.

• Collaborate with cybersecurity teams to support vulnerability remediation,

configuration compliance, and secure baselines.

• Ensure systems align with NIST, STIG, CMMC, and internal governance

requirements.

• Coordinate maintenance windows, upgrades, disaster recovery testing, and

capacity planning.

• Maintain accurate technical documentation, SOPs, and operational procedures.

• Serve as an escalation point for Linux-related production issues.

Qualifications

Education: Bachelor’s degree in Information Technology, Computer Science, or a related

technical discipline, or equivalent experience.

Experience:

• Minimum of 7–10 years of progressive Linux systems administration experience.

• Strong experience supporting enterprise OEL/RHEL environments in secure or

regulated settings.

• Experience with scripting and automation using Bash, Python, Ansible, or similar

tools.

• Familiarity with virtual infrastructure, storage, and enterprise backup/recovery

concepts.

• Experience with identity services, network fundamentals, and remote system

administration.

• Exposure to compliance frameworks such as NIST 800-171, STIG, and CMMC is

preferred.

Technical Expertise:

• Linux administration, especially OEL/RHEL.

• System hardening, patch management, and security baseline enforcement.

• User, group, and permission management.

• Service management, logging, monitoring, and performance tuning.

• SSH, DNS, DHCP, networking basics, and troubleshooting.

• Automation and configuration management.

• Virtualization and storage exposure a plus.

• Cloud experience with Azure or similar platforms a plus.

Certifications (Preferred):

• Red Hat Certified System Administrator (RHCSA)

• Red Hat Certified Engineer (RHCE)

• CompTIA Linux+

• CompTIA Security+ or equivalent

• AWS or Azure administrator certification a plus

Core Competencies

• Strong troubleshooting and analytical skills.

• Ability to work independently and prioritize tasks in a production environment.

• Commitment to security, documentation, and operational excellence.

• Excellent communication and collaboration skills.

• Experience supporting secure, distributed environments with high availability

requirements.