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Ernest Teem

@ernestteem

Senior Site Reliability Engineer improving Linux reliability through automation, observability, and scalable cloud infrastructure.

United States

Message

What I'm looking for

I’m looking for a Linux/SRE role where I can modernize infrastructure with automation and observability, strengthen security practices, and partner cross-functionally to deliver reliable, scalable systems.

I’m a Senior Site Reliability Engineer with a strong background in Linux systems, automation, and cloud environments. At Credit Acceptance, I’ve focused on improving system reliability by reducing manual operations and delivering scalable infrastructure solutions across Linux and AWS.

From leveraging AAP (Ansible) to build GitOps-ready provisioning pipelines and integrating provisioning workflows into ServiceNow, to automating Splunk actions that improved incident response, I build reliability into day-to-day operations. I’ve also designed secure solutions like daily password rotation integrated with Vault, re-architected AWS SFTP infrastructure using containers for maintainability and scalability, and implemented monitoring that detects unexpected server reboots.

Experience

Work history, roles, and key accomplishments

Senior Linux Engineer

Credit Acceptance

Apr 2025 - Apr 2026 (1 year)

Leveraged Ansible Automation Platform to build GitOps-enabling pipelines and provisioning roles/plays for development teams. Integrated provisioning workflows into ServiceNow and maintained an AWS-based FTP/SFTP platform with security and performance improvements.

GitOps AWS SFTP ServiceNow Automated Provisioning

Senior Site Reliability Engineer

Credit Acceptance

Apr 2017 - Apr 2025 (8 years)

Built an automation framework using Splunk to take automated actions, improving incident response and reducing manual intervention. Automated Oracle installation across Linux environments, implemented daily password rotation integrated with Vault, and re-architected an AWS SFTP dealer inventory system using containers for improved scalability and deployment consistency.

Splunk Automation Incident Response Vault AWS SFTP Oracle Linux

Senior Linux Systems Administrator

Credit Acceptance

Jan 2016 - Jan 2017 (1 year)

Automated on-call rotation handoffs and built systems to refresh cache databases to improve data consistency. Developed a Go-based vSphere inventory generator and implemented monitoring to detect and respond to unexpected server reboots.

Linux Systems Administration Automation Go VSPhere Monitoring Database Cache Refresh

Linux Systems Engineer (Contract)

Teksystems / Sears

Jan 2015 - Jan 2016 (1 year)

Designed and implemented an email archiving system using Hadoop. Managed virtualized infrastructure with KVM/virsh, engineered bridged networking for VM/LAN integration, and supported Kolab upgrades.

Hadoop KVM Bridged Networking Virtualization Kolab System Architecture

Linux Systems Administrator

Easy Online Solutions

Jan 2012 - Jan 2015 (3 years)

Managed ~2000 Linux servers across bare-metal and virtual environments and built a web-based control panel to simplify client infrastructure management. Automated Apache to Nginx migrations using custom Perl scripts and implemented backup automation to improve reliability and recovery during client migrations.

Linux Server Administration Apache Nginx Perl Backup Automation Infrastructure Migration Configuration Management Troubleshooting

System Support Technician

ITT Technical Institute

Jan 2009 - Jan 2012 (3 years)

Led fiber optic installation for a WAN upgrade and managed router, switch, and server upgrades under tight timelines. Built a Linux-based helpdesk system, supervised and trained lab technicians, and developed automation tools for imaging/deployment and custom Linux boot disks for recovery workflows.

Linux Technical Support Fiber Optic Installation Troubleshooting Automation Tools Imaging Deployment Recovery Boot Disks