Network & Security
João Correia
SOC Analyst · Critical-Infrastructure Defence
I defend networks and the critical infrastructure behind them. I watch the details that other people miss — in security, the details are where it counts.
Open to junior Network Security Engineer roles·Lisbon, Portugal
01 — Focus
What I do
OT / ICS
Critical-infrastructure defence
I protect operational-technology networks, where a fault can stop the physical world.
Blue team
Detection & response
I watch SIEM telemetry, correlate logs, and turn noise into a clear signal.
Network
Secure network design
I build routed, switched, and tunnelled networks that stay defensible.
02 — Stack
Skills & certifications
Network
OSPF / BGPIP / MPLSVPN (IPsec)Switching
Security
Threat detectionIncident responseSegmentationHardening
Tools
SplunkArcSightFortinetSCADA / OT
Certifications
CCNAFortinet NSE 2CCNP Security
03 — Track record
Experience
SEP 2025 — PRESENT
SOC Analyst L1
SOC / NOC @ E-REDES
- Monitor SIEM telemetry (Splunk, ArcSight) across an OT and critical-infrastructure environment.
- Correlate logs to detect and triage anomalous traffic, and tune rules to cut false positives.
JUN 2024 — SEP 2025
Network Technician
Network Support @ NOS
Intern → L1 Support → L2 Support
- Resolved Layer 3/4 escalations: routing, switching, and connectivity across the operator network.
- Configured and troubleshot routing protocols and site-to-site and remote-access VPN tunnels.
2021 — 2023
CTeSP · Systems and Network Administration
CINEL
- Designed and secured LANs with VLAN segmentation, ACLs, OSPF, and BGP.
05 — Contact