Freelancer profile translated to English.
Back to original languageAbout Hartmann
Messaging Architect & Windows Server Expert,
I support large organizations in the design, transformation, and security of their Microsoft platforms (Exchange, Active Directory, Microsoft 365) within complex and highly exposed environments.
Some examples of high-stakes projects I have delivered:
- Exchange migrations and hybridization (On-Premise ↔ Exchange Online),
- AD / Identity infrastructure modernization,
- Optimization of messaging flows and compliance (journaling, auditing, security),
- Industrialization and automation of operations (PowerShell).
Accustomed to large-scale environments (100k+ mailboxes, multi-region), I combine an architectural approach (HLD/LLD) with the ability to deliver concretely in production. I collaborate with technical teams (L1 to L3) to ensure knowledge transfer for the RUN of delivered projects, as well as the optimization of existing processes.
My goal: to make critical platforms reliable, reduce operating costs, and secure usage while ensuring service continuity
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km)
Experience
- Société GénéraleMessaging Architect ConsultantBANKING AND INSURANCEFebruary 2025 - Today (1 year and 4 months)Fontenay-sous-Bois, France• • Migration of Exchange server 2016 to 2019, then to Exchange SE in a hybrid environment• • Migration of entities (acquisitions and divestitures)• • Automation of resubmissions of journaling NDRs received in the alternate journaling mailbox• • Implementation of journaling rules for legal archiving and monitoring• • Redesign of journaling flow routing and optimization of inbound/outbound mail routing and EXO/On-prem• • Implementation of Microsoft Bookings (Personal Booking Page)• • Creation and implementation of messaging technical architectures (HLD, LLD)• • Technical architecture documentation, installation and operation procedures• • Automation based on technical tools, PowerShell scripting and scheduled tasks• • Studies and production of migration procedures• • Optimization of administration and monitoring actions following the review of L1/L2/L3 team processes• • Maintenance of infrastructure consistency and capacity management• • Incident management for various causes of non-delivery of journal reports and necessary changes• • Compliance and security of the messaging platform following audit results with mitigation plan• • Load estimations for requests and projects, action plans and impact analyses, test plans• • Ensure parallelism of the test platform with the production environment (versions, tools, automation, etc.)
- BNP ParibasArchitect ConsultantBANKING AND INSURANCEApril 2022 - January 2025 (2 years and 8 months)Montreuil, France• • Design, build, and implement a scripted and industrialized solution to migrate Distribution Lists to Exchange Online (approximately 100,000 DLs)• • EMA (Email Middleware Application) Project: participate, build, and implement a scripted solution to migrate existing application mailboxes from Lotus Notes to Exchange 2016• • Participate in the migration of Exchange infrastructure monitoring from Geneos to Dynatrace: monitor agent deployment and node integration, and recreate existing Geneos monitoring metrics• • Maintenance of the Exchange 2016/2019 infrastructure (deployment of Microsoft Exchange Server SU & CU patches) on DEV/UAT and PROD.• • Implement corrective measures for security audit results on the messaging environment• • Manage and provide L3 support for 120,000 mailboxes (On Premises + Exchange Online)• • Management of BNP Paribas CIB messaging platforms, particularly Exchange 2016, Exchange Online, hybridization infrastructures, and messaging meta-directory solutions.• • Define messaging standards and assist regional L3 teams (AMERICAS and ASIA) in implementing/maintaining them.• • Work on convergence and reconciliation with the ITG (BNP Paribas IT Group) messaging teams• • Contribute to the ongoing migration project from Exchange 2016 to Exchange Online, both from a study and a production/monitoring perspective.• • Administration tasks for Exchange recipients on meta-directory services for email routing purposes (IBM SDS/SDI)• • Over 180 servers distributed across 3 zones (EMEA, AMER & APAC)• • Provide technical support to L2 messaging teams (based in Madrid for the EMEA region) and update the knowledge base• • Collaborate with the automation team to provide or adapt solutions to project needs
- MTN (Mobile Telephone Network)IT Infrastructure IP Networking Systems SupervisorTELECOMMUNICATIONSJune 2019 - April 2022 (2 years and 10 months)Benin• • Migration of Microsoft Exchange 2010 to 2016 with implementation of MS Exchange Edge 2019 server and Administration of the new platform• • Implementation of retention policies on Microsoft Exchange and automatic archiving to Online Archive (Microsoft Cloud Subscription)• • Migration of mailboxes from Exchange to Office 365 (M365 F1, E3 & E5 Subscription) and Administration of the Hybrid platform• • Automation of tasks in PowerShell• • Development of technical architecture documents for the project to implement a virtualized System Infrastructure of AD, DNS, DHCP, and Exchange Messaging servers at Société des Aéroports du Benin (SAB)
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Education
- BeyondTrust Password Safe Admin v72021BeyondTrust Password Safe Admin v7
- ISO/IEC 27001 Foundation (Information Security)2019ISO/IEC 27001 Foundation (Information Security)