Freelancer profile translated to English.

Description

In my career as a Systems and Networks Administrator, I have specialized in infrastructures for SMEs:firewalls, VPN, servers, virtualization, and corporate email.I work daily withSophos/OPNsense, Proxmox/VMware, and Linux/Windows environments**, designing and maintaining **secure, stable, and documentednetworks.

Services I perform most frequently:

• Configuration, hardening, and auditing of firewalls (**Sophos, OPNsense**; experience with **Fortigate/Mikrotik**)

• VPN design and deployment (**IPSec, SSL VPN, site-to-site, and remote access**)

• Administration ofLinux/Windowsservers and network services (**AD, DNS, DHCP**)

• Virtualization with **Proxmox/VMware**, consolidation, and performance improvement

• Monitoring and alerts withZabbix +automation (**PowerShell, Bash**)

• Recurring support for SMEs and incident resolution fornetwork and security

I usually come in when "nothing works" and stay to ensure it doesn't happen again: I standardize, document, monitor, and leave the infrastructure ready to grow without surprises.

Industry field of expertise

Languages

Spanish
Native or bilingual
English
Conversational

Workplace preferences

Can work on-site

Madrid (up to 50km), Málaga (up to 50km), Barcelona (up to 50km), Zaragoza (up to 50km), Bilbao (up to 50km)

Alpex Digital
On Malt
Firewall Intervention
November 2025 - November 2025
Remote intervention on a client's perimeter firewall to diagnose and resolve a connectivity issue. I analyzed the configuration of rules and active sessions, applied the necessary adjustments, and validated the correct operation with the client, documenting several recommendations for improvement and best security practices.
Incident Diagnosis and Resolution Access Rule and Policy Management Remote Technical Support Firewall Network Administration
Grupo AL
Systems, Networks, and Cybersecurity Administrator
February 2020 - Today (6 years and 4 months)
Malaga, Spain
Administration:
• Exchange, Office 365, and Azure environments.
• Windows Server (Domain Servers, DNS)
• Sophos, Cisco, Mikrotik Firewalls.
• Linux, Windows environments.
• Data Processing Centers.
• Virtualized systems (vmware esxi)
• Dahua access and control systems.
IDB Mobile Technology
Systems Administrator
September 2016 - September 2019 (3 years)
Malaga, Spain
Content management consultant.
Deployment of CMS and ERPs.
Management, administration, maintenance, and security of the same.