Worked on the UML-Cyber-Security/CCDC_Practice_Infrastructure repository to consolidate and refactor Linux system hardening playbooks, focusing on standardizing the initial Linux baseline for new hosts. The approach involved reorganizing Ansible playbooks, removing outdated configurations, and unifying account management, SSH, auditd, journald, and sysctl settings into a streamlined structure. This consolidation reduced maintenance overhead and clarified the infrastructure code base, enabling more reliable and repeatable deployments. The work emphasized stability and maintainability, laying a stronger foundation for future development. Technologies used included Ansible for configuration management, Linux system administration, and YAML for playbook definition and organization.