Job Description: *Linux/Windows Systems Administrator – Senior* We are looking for a Senior SysAdmin to join a high-impact team at a major financial institution. The position is part of a critical infrastructure operation focused on availability, security, and operational continuity. **Responsibilities:** * Administration of Linux and/or Windows servers. * Implementation of security policies. * Patch management, updates, and hardening. * Monitoring, incident resolution, and performance analysis. * Automation of tasks (Bash, PowerShell, Python desirable). * Technical documentation and continuous improvement. **Requirements:** * \+5 years of experience in systems administration. * Experience with virtualization (VMWare / Hyper\-V). * Knowledge of networking, DNS, DHCP, VPN. * Proficiency with monitoring tools (Zabbix, Prometheus, etc.). * Experience in mission-critical production environments. **Work Model:** Hybrid / CABA