Open to Work

Santiago
Callegari

Junior Network Engineer & NOC Analyst

Specialist in LAN/WAN administration, Fortinet security, and network monitoring. Passionate about automation and cybersecurity. Currently pursuing a Bachelor's in Cyberdefense.

callegarisantiago0@gmail.com LinkedIn Profile
Río Tercero, Córdoba, Argentina

Technical Arsenal

Networking Core

  • VLANs, STP, EtherChannel
  • OSPFv2/v3, BGP Concepts
  • IPv4/IPv6 Subnetting
  • L2 Segmentation

Security & Firewalls

  • Fortinet Fabric
  • IPsec & SSL VPNs
  • ACLs & Zone-Based Firewall
  • Port Security & DHCP Snooping

Observability

  • Zabbix (Server/Proxy)
  • Dynatrace (APM)
  • Wireshark & Packet Analysis
  • SNMP, Syslog & NetFlow

DevNet & Tools

  • Bash & Python Scripting
  • REST APIs & JSON/YAML
  • Linux Administration
  • Git Version Control

Professional Experience

Network Instructor

Jun 2025 – Present

Instituto Técnico Río Tercero

Leading practical networking education for future technicians.

  • Delivering comprehensive training on VLANs, DHCP, DNS, ACLs, and routing protocols.
  • Designing complex topology labs using Packet Tracer and GNS3.
  • Mentoring students in troubleshooting methodologies using Wireshark.

Freelance IT Technician

Mar 2023 – Present

Self-Employed

Providing IT infrastructure support for SMBs.

  • Resolved 50+ incidents regarding L2 segmentation and connectivity.
  • Deployed Zabbix servers/agents for proactive monitoring.
  • Hardened small office networks using ACLs and firewall rules.

FTTH Network Intern

Aug 2024 – Sep 2024

Cooperativa de Obras y Servicios Públicos

Hands-on experience in ISP infrastructure.

  • Managed GPON provisioning and ONT configuration.
  • Optimized inventory management by 70% using a custom Excel/Barcode solution.

Education & Certifications

Bachelor's in Cyberdefense

UNDEF - Universidad de la Defensa Nacional

In Progress

Technical High School Diploma

Instituto Técnico Río Tercero

2023 • Technician in Informatics

Certifications & Knowledge

Fortinet Certified Associate (FCA)

ID 1101209200SF
Fabric SecurityFirewall PoliciesNAT & PATSSL/IPsec VPNsLogging & Reporting

Cisco CCNA (Modules 1-3)

Complete Training
CCNA 1: OSI/TCP Models, IPv4/IPv6 Subnetting, Ethernet concepts.CCNA 2: VLANs, Trunking (802.1Q), STP, EtherChannel, DHCP, Routing (Static/OSPF).CCNA 3: ACLs, NAT, VPNs, QoS, Network Automation (REST APIs, SDN, JSON), Virtualization.

ISC2 Certified in Cybersecurity

Training Completed
Security PrinciplesIncident ResponseAccess Control

Projects & Labs

Enterprise Network Design

GNS3 / Cisco

Full-scale topology with Inter-VLAN routing, OSPF areas, and hardened access via ACLs.

Zabbix Monitoring Stack

Linux / Zabbix

End-to-end monitoring setup: Server installation, agent deployment, and custom trigger creation.

FortiGate Security Ops

Fortinet VM

Implementation of UTM features, Site-to-Site VPNs, and SD-WAN rules.