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