πŸ“ž (+33) 6 50 41 52 53 βœ‰οΈ olivier@obrun.fr πŸ’Ό Freelance πŸ’Ά Daily rate €850
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Olivier Brun

Olivier Brun

Cloud, Cybersecurity & Data Architect

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I am a freelance cloud and cybersecurity architect working on high-value missions across AWS, Azure and Google Cloud.

I have more than 25 years of IT experience, including over 10 years in cloud, data and security architecture roles.

My background spans banking, insurance, retail, industry, hosting and Big Data platforms.

I support organizations with architecture design, IAM governance, network security and cloud standardization.

I also work on infrastructure as code, automation, monitoring, compliance and technical architecture documentation.

My core topics include IAM, RBAC, ABAC, SSO, MFA, PAM, Zero Trust, CSPM, supervision and securing hybrid or multi-cloud environments.

I have delivered missions in sensitive contexts with strong requirements around security, compliance and operational resilience.

I combine a senior architect mindset with a strong hands-on background in production, infrastructure, security and Big Data.

I can support clients as a cloud architect, security architect, IAM lead, cloud governance consultant or transformation advisor.

Available for freelance assignments, I bring a direct, structured and results-oriented approach.

Daily rate €850 / day
Availability Freelance available

Key Skills

AWS Azure Google Cloud Cybersecurity IAM Zero Trust Terraform Kubernetes BigQuery Cloudera Data Platform Monitoring Compliance Architecture

Experience

GCP Cloud Architect – Retail

Sep 2024 – Dec 2025 | Paris

Google Cloud architecture mission focused on scoping, architecture design, standard definition and access governance. Worked on IAM, RBAC/ABAC models, separation of privileges, supervision and technical documentation in a demanding cloud environment.

GCP Cloud Security Architect – DIAC / Mobilize Financial Services

May 2023 – Aug 2024 | Paris

Designed and secured GCP architectures in a banking environment with CloudGuard, Fortanix EKM, SSO, MFA, RBAC, PAM and IAM governance. Mission structured around compliance, audits, Terraform, access controls and cloud security for a regulated context.

Cloudera Architect – MAIF

May 2022 – May 2023 | Niort

Provided level-3 support and security hardening for a large-scale Cloudera datalake, with Ansible automation, hardening, risk analysis and flow control. Mission combining critical platform operations, Big Data expertise and operational cybersecurity.

AWS / Azure Security Architect – Danone

Dec 2019 – Apr 2022 | Paris

Multi-cloud security architecture across AWS and Azure, with strong focus on infrastructure as code, IAM, KMS, monitoring, encryption, bastion, WAF, Sentinel, Key Vault, NSG, PIM and MFA. Mission focused on industrialization, cloud security and DevOps enablement.

Cloud Architect – AXA Tech

Jul 2018 – Dec 2019 | Paris

Cloud architecture and security governance mission in the insurance sector, with Azure migration, Data Lake, Terraform, AWS, Hadoop and security reporting. Covered cloud strategy, compliance, deployment industrialization and transversal service security.

AWS / Azure Architect – Banque de France

Jun 2016 – Jun 2018 | Noisiel

Designed Azure and AWS cloud environments, including IaaS/PaaS platforms, migration, Hortonworks datalake, BigQuery and cloud security. Mission delivered in a sensitive banking context with strong requirements on robustness, cost control and security.

Cloud Architect – Vente-PrivΓ©e

2015 – 2016 | Saint-Denis

Supported cloud architecture decisions, on-premise to AWS migration, standard definition and cloud service analysis. Strong advisory and architecture role in a high-volume e-commerce environment.

Technical / Security Manager – Hosteur.com

Nov 2002 – Dec 2009 | Aix-en-Provence / Sofia

Co-founder and technical manager of a hosting company, overseeing large Linux and Windows server estates, databases, virtualization, networking, backups, monitoring and technical teams. This is the operational foundation of my profile: production, security, operations and technical leadership.

CV

Download the French and English CV versions.

Contact

For freelance assignments in cloud architecture, cybersecurity, IAM, governance, data or secure AWS, Azure and GCP environments:

Daily rate €850 / day
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