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Yasin OzturkYO

Yasin Ozturk

Detection & SecOps Engineer — SIEM / EDR

€550/day
Argenteuil, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Yasin

SOC N2 Cybersecurity Analyst with a rare dual expertise:
3 years of incident detection & response on CAC40 scope
(Splunk, Wireshark, Qualys) at Orange Cyber Défense / TotalEnergies,
backed by 15 years of Network & Security foundations (Palo Alto, Fortinet,
Zscaler, F5, Cisco).

🎯 My added value
I analyze SIEM alerts with the perspective of an engineer who has
deployed the infrastructure: fewer false positives, faster qualification,
and the ability to coordinate the response up to WAN isolation.

🛠️ What I do daily
- Splunk Detection & Triage (SPL, dashboards, correlation rules)
- Incident Response (Red Button, FortiGate / Palo Alto isolation)
- Network Forensics (Wireshark analysis, post-incident)
- Vulnerability Management (Qualys, remediation tracking)
- Configuration of Syslog flows to SIEM

🏢 Environments mastered
TotalEnergies · Orange Cyber Défense · Bolloré T&L · ENGIE IT ·
Allianz · EDF / ERDF · Vinci Energies — all CAC40 / critical environments.

📍 Île-de-France · On-site or hybrid mission · Immediate availability
🎓 Certifications: Splunk Core Power User · Fortinet NSE7 ·
AWS SAA · CCNA · CySA+ in progress

💬 Available to discuss your SOC needs, security audits, or Network & Security expertise missions.
  • English

    Fluent

  • French

    Native or bilingual

Can work on-site
Argenteuil (up to 40km)

Experience

  • Orange Cyberdefense
    Cybersecurity Analyst SOC N2 | Splunk · Forensics · Incident Response
    ENERGY AND UTILITIES
    August 2023 - March 2026 (2 years and 7 months)
    Courbevoie, France
    Configuration of Syslog forwarding (FortiGate, Palo Alto, Zscaler) to Splunk & Dynatrace — centralization of security visibility for TotalEnergies perimeter.
    ▸ Creation of L1 dashboards: Zscaler tunnel monitoring (up/down), detection of critical flow interruptions, automatic incident triggering.
    ▸ SPL Support for L2 analysts: customization of Splunk queries, adaptation of detection rules to the TotalEnergies context.
    ▸ Red Button — Incident Response: immediate isolation of a compromised site's WAN via FortiGate, coordination of security and business teams.
    ▸ Network Forensics: in-depth analysis of Wireshark frames, investigation of complex packet errors during post-incident analyses.
    ▸ Vulnerability Management: Qualys campaigns, results analysis, transmission of vulnerability reports to dedicated teams.
    Cybersecurity Splunk SIEM Vulnerability Management Syslog
  • BOLLORE Transport et Logistics
    Security Network Expert — Zero Trust Segmentation & Run
    LOGISTICS AND SUPPLY CHAIN
    November 2022 - May 2023 (6 months)
    Puteaux, France
    ▸Design & implementation of network/security micro-segmentation (Bolloré Africa carve-out → MSC) — isolation of critical environments.
    ▸Splunk for flow audit: validation of post-deployment segmentation, detection of flows non-compliant with new policies.
    ▸International infrastructure L3 support: L2/L3 LAN/WAN support, VPN, proxy, Aruba WiFi across ~500 MPLS/IPsec sites
    Fortimanager Panorama Splunk Pulse Secure azure
  • VINCI Energies
    Senior Security Engineer
    ENERGY AND UTILITIES
    February 2020 - September 2020 (7 months)
    Saint-Denis, France
    ▸L2/L3 incident management: Checkpoint & FortiGate firewalls, Zscaler filtering, F5 WAF. Network & security audits, DNS management.
    ▸L2/L3 LAN/WAN/WiFi incidents, operator coordination (Equinix, Colt, OBS, NTT). Cisco Viptela/Vmanage SD-WAN. AWS & Azure L3 support.
    Wifi Zscaler Check Point VPN F5

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Education

  • Cisco ccna routing and switching
    global knowledge
    2019
    Cisco ccna routing and switching
  • AWS
    global knowledge

Certifications

Skill set

Categories