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Sinan CoskunSC

Sinan Coskun

Network Engineer

€290/day
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Sinan

From NOC supervision at Free to critical infrastructure administration at Bpifrance and EPC Groupe, I work across the entire technical chain: from rack cabling to Cloud security.

🌐 Network & Security (Admin & Ops)

Cisco (Switching) and Fortinet (Firewalling, traffic) administration.

Critical network supervision (Zabbix, Grafana, LNMS).

Network asset and IPAM management via Netbox.

💻 System & Cloud (Admin & Scripting)

Complete Microsoft 365 and SharePoint administration.

Device management and imaging via Intune / Autopilot.

Automation of repetitive tasks in PowerShell.

🛠️ Tech & Support (Field & On-site)

Hands-on: Rack cabling, hardware deployment, and physical maintenance.

Support: L2/L3 incident management, ticketing (GLPI, Jira), and documentation.

Why choose me?
Versatile, rigorous, and accustomed to Agile methodology (SAFe), I adapt equally well to architecture projects and immediate operational needs.
  • French

    Native or bilingual

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

Experience

  • Bpifrance
    Network Engineer
    BANKING AND INSURANCE
    September 2024 - Today (1 year and 9 months)
    Maisons-Alfort, France
    Network Security: Administration of Fortinet Firewalls (traffic opening, log analysis, and advanced troubleshooting via FortiAnalyzer). Operational management (Run) of the Netskope SASE solution.

    Infrastructure: Configuration and deployment of Cisco equipment. Management of physical cabling in critical environments.

    Observability & Inventory: Proactive network status monitoring via LNMS. Responsible for the reliability of technical inventory and IPAM on Netbox.

    Documentation & Design: Audit and complete redesign of network infrastructure diagrams for various Regional Directorates to ensure up-to-date and usable documentation.

    Methodology: Collaborative work in an Agile environment (SAFe Framework) with activity and ticket tracking in Jira.
    Network Administration System Administration Network Engineer Network Security Monitoring
  • SYNALIT
    Co-founder
    CONSULTING AND AUDITS
    January 2026 - Today (5 months)
    Hôtel de Ville, Paris, France
    Synalit is a consulting and integration firm specializing in the digital transformation of SMEs and ETIs. As an expert in the Odoo ecosystem, Synalit supports its clients in optimizing their business processes: from sales management to accounting, including regulatory compliance.
    ERP Odoo CRM Audit SME/VSE
  • EPC Groupe
    Systems and Network Administrator
    ENERGY AND UTILITIES
    August 2023 - September 2024 (1 year and 1 month)
    La Défense, Puteaux, France
    Microsoft 365 & Modern Workplace: Complete tenant administration (Exchange Online, SharePoint, Teams). User lifecycle management, license administration, and collaborative space governance.

    Device Management & Mobility (Intune): Implementation of Modern Management via Microsoft Intune. Workstation imaging (Autopilot), application package deployment, and compliance policy management.

    Automation & Scripting: Development of PowerShell scripts for automating recurring tasks (onboarding, inventory reports, bulk changes on AD/M365).

    Security & Network: Administration of Sophos firewalls. Management and monitoring of traffic rules, filtering, and securing remote access (VPN).

    Support & Maintenance: Level 2 and 3 support for users. Incident and request management via the GLPI ticketing tool, with up-to-date hardware inventory.
    Network Administration System Administration IT Security Network Security Ticketing

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Education

  • Master Cybersecurity, Networks & Cloud
    EFREI - Grande école du numérique
    2026
    Master Cybersécurité
  • Bachelor Cybersecurity & Ethical Hacking
    EFREI Paris
    2024
    Bachelor Cybésecurité & Ethical Hacking

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