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Ahmed KhirennasAK

Ahmed Khirennas

Cybersecurity Consultant / System Engineer

€250/day
Geneva, CH
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Ahmed

My experiences are not just a learning path: they immediately placed me in high-stakes missions, requiring autonomy, precision, and a sense of responsibility.
These years have allowed me to acquire concrete mastery of cybersecurity projects, to collaborate with technical and strategic stakeholders, and to establish myself as a reliable and operational contact.
Immediately available and mobile nationally and internationally.
  • French

    Native or bilingual

  • English

    Fluent

  • German

    Basic

  • Arabic

    Fluent

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

Experience

  • Préfecture de Police Paris Paris
    Project Manager
    September 2022 - September 2025 (3 years)
    • Carried out EBIOS RM risk analyses and contributed to internal audits.
    • Drafted notes related to Information Security (SSI), access reviews, and compliance checks (ISO 27001, GDPR).
    • IAM: managed identities and access for over 100 internal users, created and modified accounts, managed groups and permissions, applied the principle of least privilege.
    • Deployed 40 Cellebrite digital investigation (forensic) tools within police stations and provided user support. Technologies Active Directory (accounts, groups, permissions) / PowerShell (AD tasks) / PKI and certificates (notions) / One Identity Manager (OIM) / EBIOS RM / VLAN / NIST Tools GLPI (IAM requests) / Server Administration Console / Splunk (SIEM TP) / Wireshark / Cellebrite UFED/PA / ISO 27001 / ITIL v4 / GDPR / Windows Server
    EBIOS RM Windows Server VLAN Active Directory IAM
  • IUT de Cachan
    IT Support Technician (Fixed-term contract)
    January 2022 - July 2022 (6 months)
    Île-de-France, France
    • User access support: managed local accounts, application rights, and resolved permission-related incidents via Active Directory.
    • Automated simple tasks using PowerShell.
    • Installed, configured, and maintained over 80 workstations, IT equipment, and industrial automation devices.
    • Network management: assigned addresses via DHCP, supervised, and intervened.
    • Deployed a supervision tool for examination rooms and monitored technical incidents. Technologies Active Directory (local account management) Windows 10 & Windows Server DHCP/ PowerShell Scripts (basics) Tools Network supervision tool Local administration console Office 365 Suite GLPI Advanced office tools
    DHCP IT Support Network Administration Windows

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Education

  • Master's Degree (Equivalent HES Master) Cybersecurity Expert
    ESTIAM
    2025
    Mastère (Équivalent Master HES) Expert en Cybersécurité
  • Bachelor's Degree (HES Bachelor) Computer Science, Networks & Cybersecurity
    CNAM
    2023
    Licence (Bachelor HES) Informatique, Réseaux & Cybersécurité

Skill set

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