Freelancer profile translated to English.
Back to original languageAbout Nathan
Hello, my name is Nathan. Passionate about IT since my first PC builds, I now assist companies (SMEs/ETIs) in managing and securing their information systems.
Why work with me?
My approach is that of a part-time CIO, offering you the expertise of a technical director without the cost of full-time recruitment.
My goal is simple: to make your IT a performance driver, not a source of stress.
My expertise in 3 pillars:
IS Governance & Strategy: Development of PSSI, Business Continuity/Disaster Recovery Plans to ensure your business never stops, even in the event of a crisis.
Offensive & Defensive Cybersecurity: With a ranking in the Top 3% worldwide on TryHackMe and 3rd worldwide on Tensortrust.ai, I perform penetration tests (Pentests) and audits to identify your vulnerabilities before attackers do.
Cloud & Hybrid Infrastructures: Azure AD expert, I automate your deployments (Terraform, Ansible) for an agile, secure, and high-performing infrastructure.
What defines me:
Beyond lines of Python code or Cisco configurations, I am a trainer at heart. I enjoy sharing and simplifying cybersecurity challenges so that every employee becomes the first line of defense for your company.
Formerly a member of the youth council of Pontarlier and passionate about the world of "Jailbreak" and AI, I have retained that insatiable curiosity that allows me to stay at the forefront of new technological threats and opportunities.
Ready to audit your IS or deploy your next infrastructure? Let's discuss your challenges!
French
Native or bilingual
English
Conversational
Can work on-site
Lyon (up to 50km)
Experience
- ISI DSIPart-time Information Systems ManagerSeptember 2024 - Today (1 year and 9 months)Lyon, France- Performing penetration tests (Black, Gray, and White Box Pentest) on the organization's IS perimeter.- Conducting security audits and analyzing system and network vulnerabilities.- Configuring and securing infrastructures (Azure AD, Synology NAS, authentication, and identity management).- Developing and implementing security policies (PSSI / PCA / PRA).- Managing IT projects (infrastructure deployment, security and performance improvement).- Designing and deploying a secure Cisco network infrastructure with XZ Supply Chain attack study and simulation.- Securing an Active Directory environment using PingCastle and BloodHound, with security testing.- Designing a botnet on Azure AD, fully automated with Terraform and Ansible, including the development of a C2 script in Python.
- INSEECIT Technician / CybersecuritySeptember 2021 - July 2024 (2 years and 10 months)Lyon, France- On-site IT support, user assistance, hardware and software troubleshooting.- Participation in cybersecurity activities, application of security best practices, access management, and workstation security.- Active Directory (AD) administration, user, group, GPO, security policy, and access control management.- Setting up the network infrastructure for a new campus in Marseille (deployment, configuration, and support).
- Clic & ComIT TechnicianJanuary 2020 - March 2020 (2 months)Pontarlier, France- Management of client data backup and recovery.- Configuration and deployment of Android devices.- Commissioning of network printers (drivers, sharing, connectivity).
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Education
- European Master of IT Expert – Cybersecurity and High AvailabilityAFIP2026Mastère Européen Expert IT – Cybersécurité et Haute Disponibilité
- Bachelor Cybersecurity and High Availability AdministratorAFIP2024Bachelor Administrateur Cybersécurité et Haute Disponibilité