Senior Linux System Administrator (RHEL on AWS)

Job Title: Senior Linux System Administrator (RHEL on AWS)
Location: Raleigh, NC (Hybrid 2-3 days onsite/week)

Responsibilities:

• Manage, configure, and maintain 400+ Red Hat Enterprise Linux (RHEL) servers across development, staging, and production environments in AWS
• Build and maintain automation scripts using Bash/Python for ongoing operations
• Handle user management, permissions, RBAC, and sudo policies
• Apply STIG hardening, manage OS firewalls, patching cycles, CIS controls, SSH hardening, and vulnerability remediation
• Set up and maintain enterprise authentication using Active Directory, Kerberos, LDAP/LDAPS, and SSHD
• Monitor system performance, enable scaling up/down, and implement proactive alerting and log ingestion pipelines
• Troubleshoot boot failures, kernel panics, network issues, file system problems (FSx/EBS/EFS), and authentication failures
• Perform OS-level backup and recovery
• Use Ansible, Terraform, or CloudFormation to automate infrastructure
• Document runbooks, architecture diagrams, troubleshooting guides, and onboarding materials
• Collaborate with application development and operations teams
• Participate in on-call rotation (evenings and weekends)

Required Skills:

• RHEL administration
• AWS (EC2, VPC, S3, RDS, ALB, SSM, EBS, FSx, EFS)
• Active Directory, Kerberos, LDAP, SSHD
• STIG, CIS, iptables, SSH hardening, patching, audit logging
• Ansible, Terraform or CloudFormation
• Bash or Python scripting
• Performance monitoring, alerting, dashboards, log pipelines
• Troubleshooting (boot, kernel panic, network, storage)

Nice to have:
RHCT/RHCE/LPIC, Red Hat Satellite