The Linux Administrator is responsible for the reliability, security, and performance of Linux-based systems supporting on-premises and AWS EC2 environments. The role exists to operate, migrate, optimize and support RHEL workloads as they transition from on-prem infrastructure into AWS, ensuring service continuity, security compliance, and cost-effective cloud operations. Success is measured by system stability, successful migration outcomes, automation maturity, and operational efficiency.

Responsibilities & Duties

- Administer, configure, and maintain Linux servers (RHEL, Amazon Linux, Ubuntu) across on-premises and AWS EC2 environments, ensuring availability, performance, and security.
- Support and execute on-premises to AWS EC2 lift-and-shift migration activities, including system assessment, AMI creation, cutover planning, post-migration validation, and issue remediation.
- Manage AWS EC2 infrastructure including instance provisioning, right-sizing, AMIs, EBS volumes, security groups, IAM role integration, and lifecycle management.
- Implement automation and configuration management using tools such as Ansible, shell scripting, or Terraform to reduce manual effort and configuration drift.
- Monitor system health, troubleshoot incidents, perform root-cause analysis, and participate in on-call rotation to meet SLAs during steady-state and migration phases.
- Apply OS hardening, patching, vulnerability remediation, and support compliance and security standards across hybrid environments.

Position Requirements

Required

- Bachelor’s degree in Computer Science, Information Technology, or equivalent practical experience
- 5+ years of experience as a Linux Systems Administrator in enterprise environments
- 2+ years of hands‑on experience administering AWS EC2 in production
- Strong experience administering RHEL in on‑prem and/or cloud environments




- Experience supporting business‑critical systems during infrastructure changes or migrations

Preferred

- Experience with large‑scale on‑prem to AWS migration initiatives
- Experience in hybrid infrastructure environments
- AWS Certified SysOps Administrator- Associate or higher or equivalent certification (preferred, not required)
- Experience with Infrastructure-as-Code (IaC) (Terraform, Ansible, CloudFormation)
- Experience with scripting/automation in Bash, Python, or PowerShell

Technical Skills

- Advanced Linux system administration, troubleshooting, and performance tuning
- AWS EC2, EBS, AMIs, security groups, and IAM role integration
- Lift‑and‑shift migration concepts, system validation, and post‑migration support
- Automation and scripting (Bash, Ansible, Terraform preferred)
- OS hardening, patch management, and vulnerability remediation

Physical Abilities / Demands

- Ability to support after‑hours maintenance windows and possible on‑call rotations
- Ability to work extended periods at a computer and respond to incidents as required

KNOWLEDGE & COMPETENCIES

- Ability to make operational and technical decisions related to system configuration, migration readiness, troubleshooting, and cloud resource optimization
- Capable to plan and execute work independently, coordinate with network, cloud, application, and security teams, and escalates risks appropriately, providing technical guidance to peers or project teams.
- Must be able to troubleshoot both routine operational issues and complex migration‑related problems involving OS behavior, cloud infrastructure, and application dependencies. Requiring disciplined troubleshooting, adaptability, and a bias toward automation and long‑term operational improvement rather than one‑off fixes.

Offer

- Protegido de gastos medicos mayores familiar, Seguro de vida, fondo de ahorro, vales de despensa, vales de restaurante, bono anual, apoyo deportivo, prima vacacional del 100%, 15 días de vacaciones, 30 días de aguinaldo y estacionamiento.

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📌 Linux Administrator (Ciudad de México)
🏢 CRH Talento en IT
📍 Ciudad de México