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Charles MauboussinCM

Charles Mauboussin

IT Operations & Cybersecurity Consultant.

€500/day
2 projects
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Charles

Independent consultant in infrastructure and cybersecurity, I support VSEs, SMEs, and large accounts in the management, security, and outsourcing of their information systems.
I intervene end-to-end: systems administration (Windows Server, Active Directory, Microsoft 365), network (routing, switching, VLAN, VPN, Fortinet firewall), VoIP telephony (3CX, Asterisk), backup and disaster recovery/business continuity plan (DRP/BCP), and L2/L3 support.
On the security side: configuration hardening, filtering policies, site-to-site VPN and remote access, configuration audits, incident management, GDPR compliance, and ANSSI hygiene.
I automate and optimize operations through scripting (PowerShell, Bash, Python) and leverage AI and agent-based development solutions to deliver faster and document properly.
Rigorous diagnostics, autonomy, and pedagogical approach with non-technical stakeholders. Available remotely and in the Île-de-France region.
  • French

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • OTO Technology
    Freelance Mission · Systems & Network Administrator
    January 2026 - May 2026 (4 months)
    Levallois-Perret, France
    Administration and operation of systems and network infrastructure. Integration of AI solutions and agent-based development to automate and optimize operations. Deployments and technical interventions for clients.
    (Environment: systems, network, AI / agent automation.)
    AI Agent AI Development Systems and Network Administrator Automation Node.js Development
  • Freelance – Développeur Fullstack
    Fullstack Web & API Developer
    TECH
    January 2022 - Today (4 years and 5 months)
    Sèvres, France
    Development of custom web applications (React, Node.js), creation of REST APIs, workflow automation, and integration of third-party tools. I am involved in the design, development, deployment, and maintenance of high-performance web solutions for freelancers, startups, and VSEs.

Reviews

5.0

Out of 2 ratings

J

James

WebPharma

Reviewed on 7/11/2025

Responsive and competent on this small mission. Nothing to report. I highly recommend!
G

Gary

ViaSay

Reviewed on 7/11/2025

Mission: Meta Messenger Expert – Facebook App Deployment Charles was remarkably efficient on this mission. He easily took charge of the Meta Developer environment, finalized our App configuration, and supported us through validation and publication on our Facebook page. Very pedagogical, he shared his knowledge throughout the session with clarity and professionalism. Everything was completed in a single day as planned, with a smooth skills transfer and quality support. I highly recommend Charles for any project related to Meta / Facebook Messenger integration. Serious, fast, and highly competent. Thank you again! — Gary Jehan, ViaSay

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Education

  • Fullstack Developer Training
    OpenClassrooms
    2023
    Programmation web avec JavaScript, développement d’applications complètes avec Node.js, Express, React.js et MongoDB. Apprentissage des API REST, de l’architecture client/serveur, du versioning Git, et des bonnes pratiques de clean code.
  • BTS SIO option SISR (IT Services for Organizations, Option Solutions Infrastructure Systems and Networks)
    AFORP
    2021
    Formation supérieure en informatique axée sur les infrastructures, systèmes et réseaux. Au programme : administration de serveurs Windows et Linux, configuration et gestion de réseaux (routage, commutation, VLAN, services DNS/DHCP, Active Directory), virtualisation, sécurité des systèmes d'information (pare-feu, VPN, supervision), déploiement et maintenance de parcs informatiques, ainsi que scripting d'automatisation. Formation alternant cours et projets concrets en entreprise — un socle solide en infrastructure et en administration système qui me permet aujourd'hui de gérer le déploiement, l'hébergement et la mise en production de mes applications web de bout en bout.

Skill set

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