Freelancer profile translated to English.
Back to original languageAbout Yann
I help companies secure their Microsoft 365 and Google Workspace environments through concrete audits, tenant hardening, and prioritized remediation plans.
My goal: identify misconfigurations, reduce the risk of unauthorized access, improve tenant security score, and strengthen key controls.
I focus on:
- Improving Microsoft Secure Score / security posture
- MFA, Conditional Access, IAM, and administrator accounts
- Email protection: phishing, DKIM, DMARC, SPF
- DLP, external sharing, sensitive data
- Microsoft 365 / Google Workspace hardening
My approach is pragmatic: a clear audit, actionable recommendations, and a remediation roadmap.
Available remotely from Vietnam, with hours compatible with France / Europe / APAC.
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- Palais de tokyoIT Manager — Head of IS & Digital TransformationFebruary 2019 - June 2025 (6 years and 4 months)Palais de Tokyo, Paris, FranceHardening & Cybersecurity• ▪ Development of the IS Policy from scratch: risk mapping, remediation plans, alignment with ANSSI and ISO 27001• ▪ M365 tenant hardening: Conditional Access, MFA, DLP, MIP labels, Defender for Endpoint, Defender for Office 365• ▪ Microsoft Sentinel (SIEM) deployment: log sources, detection rules, SOC dashboards• ▪ Email security: DKIM, DMARC, SPF, advanced anti-phishing policies• ▪ IAM/PAM: rights review, privileged accounts, least privilege policy• ▪ Fortigate: rule hardening, IPS, NAT, SSL VPN; Cisco/HP (VLANs, BGP, ACL)
- DatasguardManagement & StructuringJuly 2025 - May 2026 (10 months)Vietnam• ▪ Development of security audit, cloud hardening, and infrastructure consulting offers, with freelance remote interventions• ▪ Service definition, client relationship management, and deliverable oversight
- Mind Technologies,IT Security ConsultantNovember 2018 - December 2019 (1 year and 1 month)France• ▪ Integration of Stormshield firewalls, deployment of 802.1X/RADIUS, Graylog SIEM• ▪ Unix/Windows systems administration for CNIL engineers; Azure AD configuration (SSO, Conditional Access)
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Education
- Master 2 Expert in Digital Security (Bac+5)Master 2 Expert en Sécurité Numérique (Bac+5)
- Master 2 Expert in Digital Security (Bac+5)ASTON School2020Master 2 Expert en Sécurité Numérique (Bac+5)