Sebastian Torres
@sebastiantorres1
Linux SysAdmin & Cyber Security Analyst
VenezuelaWhat I'm looking for
I am a Linux SysAdmin and Security Analyst focused on protecting critical infrastructure and web operations (WebOps). My profile is hybrid: I combine the agility of a Systems Administrator with the preventive mindset of a Cybersecurity specialist.
My professional evolution has led me from technical support to Server Hardening and Incident Response. Currently, I specialize in managing environments under constant siege, where I not only configure the server but also simulate attacks (Pentesting) to validate that defenses hold up.
What do I bring to your team?
🛡️ Offensive & Defensive Security: Hands-on experience mitigating threats, cleaning malware infections (Webshells/Backdoors), and executing security audits.
🐧 Linux Proficiency: Advanced VPS administration (AlmaLinux/CentOS), performance optimization (Nginx/PHP-FPM), and forensic log analysis.
⚙️ MSP DNA: Expert in the Managed Service Providers stack. I master automation with Datto RMM, ticket management in Autotask PSA, and documentation in ITGlue.
☁️ Cloud Identity Management: User administration and security in Microsoft 365 and Entra ID (formerly Azure AD).
Experience
Work history, roles, and key accomplishments
System Administrator & Security Analyst
Mysair
Dec 2024 - Present (1 year 6 months)
● Advanced VPS administration (AlmaLinux/Nginx) via SSH for performance optimization (Swap, PHP-FPM) and security hardening (Open_basedir, WAF, Fail2Ban, Imunify360, ClamAV) to prevent intrusions. ● Deep log analysis (grep, awk, journalctl) to trace intrusion origins, detect malicious IPs, and perform manual cleanup.
● Threat mitigation and removal of malware embedded in PHP code and databases.
Desarrollador web y soporte
profesional independiente
Oct 2019 - Aug 2024 (4 years 10 months)
● Developed responsive websites with HTML5/CSS3/JS and WordPress/Elementor (minimal PHP/SQL). ● Perform WAF configuration (Wordfence, etc.), vulnerability mitigation, and malware removal.
● Managed Nginx web server via Plesk/cPanel (SSH/FTP) and handled Web/DB migrations. ● Domain Name Management, such as A Record, TXT records, and related configurations.
IT support technician
Cooperativa Seguridad Electronica Total, 303RS
May 2012 - Oct 2017 (5 years 5 months)
● Provided technical support, repairs & maintenance for hardware and software. ● Configured operating systems LINUX/Windows, & Delivered remote support via TeamViewer. ● Configured and maintained local networks, including shared resources like printers.
● Designed and implemented the company's LAN infrastructure, including cable plant and network hardware.
Education
Degrees, certifications, and relevant coursework
Professional Certificate, IT Support
Completed an eight-month IT support program developed by Google. The curriculum covered troubleshooting, customer service, networking, operating systems, system administration, and security, including hands-on labs.
Tech stack
Software and tools used professionally
Availability
Location
VenezuelaAuthorized to work in
Salary expectations
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