Systems Administrator – UNIX​/LINUX

Job Summary

The Systems Administrator – UNIX / LINUX supports, maintains, and optimizes IBM Power/AIX environments in a mission-critical enterprise setting. This role is responsible for system availability, performance, security, and lifecycle management across development, test, and production environments.

Time Type:
Full time

Job Location:

1350 IH 35 N, San Marcos, TX 78667
Pay: DOE

• Installs, configures, administers, and supports IBM AIX operating systems on Power hardware.
• Installs, configures, administers, and supports different LINUX operating systems.
• Performs system provisioning, upgrades, patching, and firmware management.
• Manages LPARs, VIOS, and PowerVM virtualization.
• Monitors system performance, capacity, and availability; troubleshoots complex issues.
• Implements and maintains system security, hardening, and compliance controls.
• Automates administrative tasks using shell scripting (ksh/bash).
• Support backup and recovery processes; participate in disaster recovery planning and testing.
• Collaborates with application, storage, network, and security teams.
• Provides on-call support and responds to incidents as required.
• Maintains system documentation and operational procedures.
• Other assignments and duties as assigned by management.
• Attends and participates in team meetings and training sessions.

• This position requires travel with overnight stays.
• Must have a current driver’s license and auto liability insurance.

• 5+ years of hands‑on experience administering UNIX in an enterprise environment.
• Strong knowledge of IBM Power Systems architecture and virtualization.
• Experience with VIOS, LPAR management, and NIM.
• Proficiency in UNIX shell scripting (ksh, bash) and cron jobs.
• Solid understanding of TCP/IP networking and storage concepts.
• Experience with system monitoring, performance tuning, and troubleshooting.
• Familiarity with backup solutions (e.g., TSM/Spectrum Protect or equivalent).
• Experience with High Availability solutions (PowerHA, HACMP).
• Experience with automation/configuration tools (Ansible, Chef, etc.).
• Familiarity with cybersecurity frameworks, scanning tools, or audit compliance, preferred.
• Experience with scripting languages beyond shell (Python, Perl), preferred.

• Prolonged periods sitting at a desk and working on a computer.
• Must be able to frequently lift and/or move 10 pounds and occasionally lift up to 50 pounds at times.
• Standard office hours apply with occasional weekends and holidays.
• Must be regularly available and willing to work on average 40 hours per week during business hours or as the employer determines are necessary or desirable to meet business needs.
• Must maintain regular and acceptable attendance at such level as is determined by management.
• The noise level in the work environment is usually moderate.

McCoy’s is an equal opportunity employer. Equal access to programs, services and employment is available to all persons. Those applicants requiring reasonable accommodations in the application and/or interview process should contact a representative of the People Development Department at . EOE, AAP, D, F, VA