Freelancer profile translated to English.
Back to original languageAbout Johann
I am a Systems Administrator with solid experience in Linux and Windows environments, specializing in virtualization with VMware, server management, and enterprise network administration.
Proven experience in:
Virtualization and management of VMware ESXi / vSphere environments
Administration and maintenance of Linux and Windows servers
Configuration and management of Active Directory, DNS, DHCP, and GPOs
Task automation, system monitoring, and critical incident resolution
Security, backup, and IT service continuity
Work with a focus on efficiency, stability, and system security. My priority is to help you reduce risks, improve performance, and ensure the continuous availability of your operations.
Whether you need occasional support, preventive maintenance, or a complete audit of your infrastructure, I am here to help.
Contact me and let's talk about how I can add value to your project.
Spanish
Native or bilingual
English
Fluent
French
Conversational
Japanese
Conversational
German
Conversational
Remote only
Primarily works remotely
Experience
- T-Systems Iberia (Deutsche Telekom Group)Network & System AdministratorFebruary 2025 - Today (1 year and 6 months)Automate domain deployments using Ansible, reducing manual setup time by ~80%. Provision and manage virtual machines in VMware vSphere. Administer Active Directory, DNS, DHCP, GPOs, WSUS, and Veeam backups. Support Citrix virtual desktops and Linux environments.
- NTT DATA Europe & LATAM (Spain)Process & System TechnicianOctober 2022 - February 2025 (2 years and 4 months)Managed Windows Server services (AD, DNS, IIS, Exchange, VPN). Administered VMware environments and backup operations with Veeam. Supported Microsoft 365 and Entra ID. Monitored infrastructure using Centreon and Nagios.
- ALIMATIC Automated ServicesNetwork & System AdministratorJanuary 2017 - December 2021 (4 years and 11 months)Installed and configured Windows Server and Linux systems, providing AD, DNS, DHCP, Mail, and VPN services. Implemented virtualization with VMware and Proxmox. Deployed network infrastructure (routers, switches, Wi-Fi). Managed security using pfSense firewalls, Squid proxy, and Snort IDS. Monitored systems and network performance with Zabbix. Implemented backup and disaster recovery procedures. Provided end-user support, documentation, and internal security training.
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Education
- Web Development with Python Full Stack Course Basic aspects of user experience designWeb Development with Python Curso Python Full Stack Aspectos básicos del diseño de la experiencia del usuario
- and fundamentals explainedUXy fundamentos explicados