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Thomas DutourTD

Thomas Dutour

Network and Security Consultant

€450/day
Agen, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Thomas

Network administrator with operational experience in a critical datacenter environment.

My expertise covers the entire network lifecycle: deployment, configuration, troubleshooting, and operational maintenance on Fortinet (VDOMs included) and Cisco environments in production. I handle complex network issues — SD-WAN, IPSec/SSL VPN, routing, VLANs, NAT, ZTNA, ADVPN server publishing, MTU/TCP clamping optimization — as well as security aspects: FortiWeb WAF, dynamic ACLs via vCenter/tag integration, certificate management.

Capable of diagnosing complex production incidents, particularly IKEv2 negotiation issues (PFS mismatch, Diffie-Hellman, unstable child_SA) or IKEv1/IKEv2 migrations on Cisco ASA and FortiGate environments.

Before my current role, I spent 2 years in a work-study program in multi-client outsourcing, covering system administration, Active Directory and Exchange migrations, software installation, O365 management, Synology NAS management, and more.

Available for full remote work or on-site in Lot-et-Garonne as needed. (Within 4 weeks)
  • French

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • COAXIS
    Network Administrator – Datacenter
    DIGITAL AND IT
    February 2025 - Today (1 year and 4 months)
    Operational management of an infrastructure of 600+ FortiGates in a multi-client datacenter environment. Daily administration: IPSec/SSL VPN, SD-WAN, FortiWeb WAF, vCenter dynamic ACLs, Cisco ASA, Call Manager. Advanced troubleshooting of IKEv2, migration of IKEv1/IKEv2 in production.
    Fortigate SD-WAN VPN VPN IPSEC Cisco ASA
  • EXOAU
    System & Network Administrator
    November 2022 - January 2025 (2 years and 2 months)
    Multi-client outsourcing: Active Directory migration, Exchange administration, management software installation, support and infrastructure maintenance.
    Microsoft Exchange Microsoft Office NinjaOne Windows Server Active Directory

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Education

  • System & Network Administrator — BAC+4
    ENI School of IT
    Administrateur Système & Réseau — BAC+4
  • Higher Technician in Systems & Networks
    ENI School of IT
    2022
    Technicien Supérieur Système & Réseau

Skill set

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