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