🧠 Profile
Linux System Administrator with 20+ years of experience in Unix/Linux environments and 10+ years dedicated to Linux system administration in mission-critical infrastructures, including government environments. Strong focus on reliability, automation, and security.
🧪 About Me
I maintain an active homelab where I design, test, and validate solutions before applying them in production.
I work with virtualization (Proxmox/KVM), containers, and automation, including Kubernetes clusters. I simulate real-world scenarios such as high availability, failure handling, and resource optimization.
I also operate production-grade services within my homelab, including publicly accessible web applications served via Apache, handling availability, security, and SSL management.
🛠️ Experience
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🏛️ Linux System Administrator
IGFEJ | 2023 – Present
- Administration of mission-critical Linux servers
- Mailman migration
- Apache reverse proxy with ModSecurity
- Management of SSL/TLS certificates using internal PKI (EJBCA), including issuance, renewal, and deployment, with automation of key processes via EJBCA API
🌐 Linux System Administrator
ONI Telecom | 2020 – 2023
- Linux infrastructure and apache management
- Troubleshooting and incident resolution
- Zabbix managment
⚙️ Linux/Unix System Administrator
CGI | Sep 2018 – Mar 2020
- Administration and maintenance of Linux (SUSE, RHEL, Ubuntu, CentOS, Debian) and Unix (Solaris, AIX) server environments
- Storage configuration (ASM, multipath, LVM, ZFS)
- Technical troubleshooting and incident resolution
- Management of local and LDAP user accounts
- SFTP service setup and configuration
- Shell scripting for automation and operational tasks
🛒 Linux System Administrator
Jerónimo Martins | 2016 – 2018
💾 System & Backup Administrator
IBM | 2015-2016
🖥️ Unix System Operator
Instituto de Informática da Segurança Social | 2006-2015