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Eric LucenaEL

Eric Lucena

Network & Infrastructure Engineer

€400/day
Barcelona, ES
3-7 years
Linux
Firewall
Observability
Network administration
Docker

Average response time: 1 hour

Freelancer profile translated to English.
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About Eric

I am a Network & Security Engineer specializing in enterprise networks, inter-site connectivity, perimeter security, automation, and infrastructure monitoring.

I help companies and IT teams design, deploy, maintain, and troubleshoot critical network environments, focusing on stability, security, and clear documentation.

I have experience in LAN/WLAN infrastructure, Cisco, UniFi, MikroTik, EdgeRouter, SonicWall, SD-WAN, routing, VLANs, site-to-site and client VPNs, WireGuard, IPsec, OSPF, PBR, high availability, and failover.

I also work with security and access control solutions such as firewalls, NAT, access rules, IPS, AAA, FreeRADIUS, 802.1X, NAC, and network segmentation. I have participated in TISAX audits, internal phishing campaigns, and internal security tests.

Additionally, I develop automations with Python, Netmiko, Ansible, Bash, and Git, and deploy monitoring systems with Zabbix, SNMP, Grafana, and Telegram alerts. For troubleshooting, I use tools like Wireshark, tcpdump, mtr, Nmap, and syslog.

I also have experience in infrastructure and services: VMware ESXi, Proxmox, Docker, DNS, DHCP, Apache/Nginx, HTTPS, and Let’s Encrypt.

I can help you with:
  • Network, VPN, firewall, or connectivity troubleshooting
  • SonicWall, VPN, SD-WAN, routing, and VLAN configuration
  • Technical network and security audits
  • Monitoring with Zabbix, SNMP, and Grafana
  • Automation with Python, Ansible, and Bash
  • Technical documentation and network diagrams
  • Improving infrastructure stability, security, and maintenance
I work with special care in production environments: I analyze before touching, apply controlled changes, validate results, and document what has been done.

I am looking to collaborate on specific projects, provide specialized support for IT/MSP teams, or work on infrastructure improvements where a solid and practical technical vision is needed.

  • Spanish

    Native or bilingual

Can work on-site
Barcelona (up to 50km)

Experience

  • AMES
    Network & Infrastructure Engineer
    MECHANICAL ENGINEERING
    June 2023 - Today (3 years and 1 month)
    Barcelona, Spain
    Design and deployment of LAN/WLAN networks with Cisco, UniFi, MikroTik, and EdgeRouter. Management of SD-WAN, OSPF, VLANs, SonicWall, IPsec/WireGuard VPNs, and NAC with 802.1X. Automation with Python, Netmiko, and Ansible; monitoring with Zabbix, SNMP, and Grafana. Administration of VMware, Proxmox, Docker, and Linux, including international deployments.
    Cisco Sonicwall SD-WAN VPN Network Troubleshooting

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