Freelancer profile translated to English.
Back to original languageAbout Karl
Systems & Network Engineer with several years of experience in critical environments (industry, transport, and banking sector).
I assist companies in the management, security, and optimization of their IT infrastructures to ensure performance, service continuity, and system security.
My areas of intervention:
• Windows Server & Active Directory Administration
• Microsoft 365: Exchange Online, Teams, OneDrive
• Enterprise LAN/WAN Networks, VPN, VLAN, Security
• Operational Maintenance (MCO) of infrastructures
• Advanced Technical Support L2/L3 & Critical Incident Management
• Deployment of security and monitoring solutions
• Backup, Disaster Recovery/Business Continuity Planning (DRP/BCP) and IT environment optimization
During my assignments, I have managed international deployments, administered complex Microsoft environments, and supported technical teams in the continuous improvement of their infrastructures.
Rigorous, autonomous, and solutions-oriented, I intervene for both one-off missions and long-term support.
Objective: To provide reliable, secure, and quickly operational solutions, adapted to business needs.
Available immediately.
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- Crédit AgricoleMicrosoft / IAM Systems EngineerBANKING AND INSURANCEOctober 2025 - February 2026 (4 months)78280 Guyancourt, France- Operational Maintenance (MCO) and optimization of Windows Server 2012 to 2019 parks- Administration of hybrid directory services (AD) and user identity/access lifecycle- Level 2 technical expertise for incident resolution on production environments- Administration of strong authentication and secure access control solutions via HID- Engineering of the Microsoft 365 solution: administration of Exchange Online and Teams flows.- Implementation and administration of quota policies via NSS to ensure resource availability.- Management of operational activity and compliance with service level agreements (SLAs) via ServiceNow- System compliance with banking security requirements and guarantee of critical operation traceability.- Capitalization of technical knowledge through the writing of Operating Dossiers (DEX) and administration procedures.- Backlog Management - Changes, Requests, Incidents
- Renault-Nissan-MitsubishiSystems and Network EngineerAUTOMOBILEJanuary 2020 - January 2025 (5 years)92350 Le Plessis-Robinson, France- Management of the global deployment of security (ESET, McAfee) and monitoring (Tanium) solutions on a critical park of 1500 workstations distributed internationally (India, Turkey, Argentina)- Coordination of technical follow-up committees and management of crisis cells to ensure the service continuity of production infrastructures- Training engineering and skills transfer to local technical teams on Windows Server environment security best practices- Remote corrective maintenance via Remote Desktop Manager: deployment of patches in transparent mode to minimize impact on employee productivity- Design and implementation of backup strategies and disaster recovery plans (DRP) based on the Acronis solution- Maintaining operational condition of LAN/WAN network architectures in a complex industrial environment
- SNCF UAIV,Level 2 Application and Systems Support EngineerJanuary 2018 - January 2019 (1 year)Paris, France- Support for field technicians on various issues with passenger information applications.- Ensure the smooth deployment of DAUPHINE (new digital display tool) in France- Find solutions and apply them remotely without disrupting display and voice information broadcasting in stations- Ensure proper management of open tickets- Training of several field teams
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Education
- Master in Apprenticeship, E3A - Networks and TelecommunicationsUniversité Paris-Saclay2018Master en apprentissage, E3A - Réseaux et Télécommunications
- Professional Bachelor's Degree, Systems and Components in TelemedicineUniversité Paris-Est Créteil (UPEC)2016Licence professionnelle, Systèmes et Composants en Télémédecine