Thomas Lemonnier

Cloud Migration & Architecture: Led infrastructure migration from

on-premises to hybrid Azure cloud, including hybrid AD to Azure AD

(200 devices) and 40TB file shares to Azure Files. Implemented Zero

Trust framework with Conditional Access, Intune, Always On VPN,

and private endpoints across hub-and-spoke architecture. Enforced

SOC 2 compliance through RBAC, time-limited privilege escalation,

and segregation of duties in regulated pharmaceutical environment.

Network Integration & Multi-Cloud Operations: Implemented

secure hybrid connectivity using Azure VPN Gateway with Site-to-

Site VPN for on-premises integration and Point-to-Site VPN (Always

On) for remote access. Managed Azure and AWS S3 multi-tenant

infrastructure with cross-tenant access, implementing multi-provider

backup strategy to mitigate single-cloud-provider risk.

AI Solutions & Innovation: Developed custom Graph Connector to

crawl external research data into Microsoft Search, enabling 40 R&D

scientists to discover insights via SharePoint and Copilot. Built POCs

in lab environment before production deployment.

Technical Leadership & Collaboration: Collaborated with IT and

development teams to deliver pragmatic solutions prioritizing

existing tooling and cost optimization. Led Azure tenant security

improvements and SSO/IAM integration.

Automation & Integration: Built Azure Functions and Logic Apps

workflows for SaaS backups and external API integrations with

automated Jira ticket creation for failure tracking.

Enterprise Infrastructure: Maintained large-scale infrastructure enabling secure remote access to applications and data for multiple companies, supporting 1000+ daily connections

As a System Engineer at NEREA Brussels, I managed complete IT infrastructure for diverse clients including international law firms and European companies. My responsibilities included on-site maintenance, system installations, backup management, and comprehensive infrastructure support.

I worked across various client environments, providing end-to-end system administration services, troubleshooting complex technical issues, and ensuring reliable IT operations. This role involved both proactive maintenance and reactive support, managing everything from servers and networks to user workstations.