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Damien LaydevantDL

Damien Laydevant

Network & Security Engineering

€500/day
1 project
Lyon, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Damien

With solid experience in network infrastructure and cybersecurity, I assist companies with their one-off or recurring technical projects, from the operator network core to the end-user workstation:

Operator Network & WAN: implementation of MPLS/SD-WAN/SASE architectures, routing optimization, management and negotiation with telecom operators
Perimeter Security: deployment and configuration of firewalls, segmentation, site-to-site VPN
LAN Infrastructure: design and deployment of switching architectures (core/distribution/access), VLAN segmentation, access security (802.1X/NAC), enterprise Wi-Fi deployment and optimization, cabling and architecture documentation.

My added value: in-depth knowledge of the operator world (Bouygues, Orange, SFR, local authorities, etc.), which is rare among purely "client infrastructure" consultants, allowing me to bridge the gap between internal technical teams, LAN infrastructure, and carrier contacts. An end-to-end vision, from WAN to the network socket.
I am available for both short, targeted assignments (audits, deployments, architecture reviews) and more regular part-time support.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Lyon (up to 50km), Annecy (up to 50km), Genève (up to 10km)

Experience

  • OKARIS
    President
    June 2026 - Today (2 months)
    Lyon, France
    Independent network and cybersecurity engineering

    designs, secures, and administers networks for very small businesses, SMEs, and large enterprises, with the rigor expected of major corporations.
    Too many companies run their business on a network built brick by brick, without an overall vision or supervision: slow speeds, vulnerabilities, and problems that are pushed back. My approach always begins with understanding the existing situation before making proposals.

    Three areas:
    • Network consulting & architecture
    • Cybersecurity: next-generation firewalls, VPN, SASE / SD-WAN
    • End-to-end engineering & managed services
    WAN Networks Cybersecurity Network Administration Multi-site Deployment SASE
  • Koesio
    Operator Pole Lead
    DIGITAL AND IT
    April 2023 - April 2026 (3 years)
    Lyon, France
    - Operator deployment / IT network project management
    - Router / firewall / switch / Wi-Fi installation
    - L3 Support
    - Leading the production team and liaising with other teams
    - Technical lead
    Networks and Telecoms MPLS WAN Networks Cybersecurity Mikrotik
  • ipexia
    Data & Voice Technician
    DIGITAL AND IT
    January 2019 - April 2023 (4 years and 3 months)
    Lyon, France
    - VoIP installations (Wildix & Asterisk) / router / firewall / Wi-Fi / switch
    - Datacenter & Backbone contributor. MPLS Cisco core network configuration.
    - L1/2/3 Support
    - Hosting administration (Web/email/DNS)
    - Proxmox Virtualization
    - Client project management
    backbone Datacenter Hosting Proxmox Wildix

Reviews

5.0

Out of 1 rating

H

Hicham

Avis sur Mr Leydevant - JET SUPPORT

Reviewed on 7/10/2026

Very good profile and excellent responsiveness and availability. Mr. Leydevant helped us resolve all the issues encountered within our installation.

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Education

  • - Networks and Telecoms Professional Bachelor's Degree - Administration and security of Cisco systems and networks CCNA 1 CCNA 2
    DUT
    - Réseaux et Télécoms Licence Professionnelle - Administration et sécurité des systèmes et réseaux Cisco CCNA 1 Cisco CCNA 2
  • Professional Bachelor's Degree, Administration and security of systems and networks
    Tétras
    2017
    Licence Professionnelle, Administration et sécurité des systèmes et des réseaux

Skill set

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