About Sébastion
French
Native or bilingual
Experience
- ESN MEEDZWORKPLACE ENVIRONMENT PROJECT MANAGERJanuary 2026 - Today (5 months)Lyon, France• ● Definition and implementation of the workplace environment strategy (workstation, GPO policies, security)• ● Management of the Windows 10 to Windows 11 migration project (scoping, deployment, support coordination)• ● Participation in technical choices and design of workstation infrastructures• ● Maintaining operational readiness of Windows and Microsoft 365 environments• ● Management of the renewal of the call for tenders contract (needs analysis, specifications, service provider monitoring)• ● Management of the integration of a new brokerage service provider• ● Implementation of a PDF compression solution before document management system integration• ● Resolution of L2/L3 incidents within the Workplace scope• ● Standardization and automation of processes (PowerShell, GPO)• ● Development of operating procedures and technical documentation• ● Management of service providers and SLA monitoring• ● Contribution to service continuity and IT system security
- ConstellationTeam Leader L2 Operations FreelanceDIGITAL AND ITOctober 2025 - December 2025 (2 months)Lyon, FranceMétropole de Lyon – IT Service Provider ConstellationGeneral Context:Joined the Constellation group as a freelance Team Leader following the award of the contract for the Métropole de Lyon, with the mission of setting up the team and managing the transition from the outgoing provider. Unfortunately, the mission ended after two months due to a legal dispute between the Métropole de Lyon and the Constellation group.Coordination of L1 and L2 support teams (8 employees)Management and planning of team activitiesParticipation in employee recruitmentTechnical and organizational pivot role with the Service Delivery ManagerHandling of complex L2 incidents and requestsManagement of major incidents (P1 / P2) and participation in crisis management meetingsPrioritization, tracking, and closure of tickets within SLAProduction monitoringTechnical operational support for the clientExecution of delegated administration tasksParticipation in IT system evolution projectsContribution to the automation of operational tasksWriting and updating documentation and knowledge baseContinuous improvement of operational processes and practices
- Coexya by extend pour le Crédit agricoleTechnical Business AnalystBANKING AND INSURANCENovember 2023 - October 2025 (1 year and 11 months)Crédit Agricole Technologies Services – IT Service Provider CoexyaCommunication & Collaboration Squad – Digital Workspace TribeRole as IT Project Manager / Business Analyst within the Digital Workspace Tribe, acting as an interface between business teams, internal technical teams, and service providers, on structuring projects related to Microsoft 365 and optimizing the group's telecom resources.Main Missions:Gathering and analyzing business needs related to collaborative uses (Teams, SharePoint, OneDrive, Outlook, Webex, Copilot).Reintegration of L2/L3 M365 support within the squad: analysis of the existing situation, definition of a new internal support model, and management of the transition.Coordination of internal squads, IT teams, publishers, and external service providers.National management of L2/L3 incidents, including critical P1/P2 incidents and participation in crisis management meetings.Prioritization, cross-functional communication, and root cause analysis.Writing and updating procedures, deliverables, and operational documentation.Implementation of dashboards and performance monitoring KPIs.Management of the application lifecycle: testing, version upgrades, functional validations, and deployments.Change management: user training and support.Strategic Project – Audit & Rationalization of the Telecom Fleet (Orange – ~100,000 lines):Inventory, consolidation, and analysis of the group's telecom fleet.Study of usage and costs with optimization recommendations.Creation of advanced analysis spreadsheets (Excel).Coordination of actions with internal teams and Orange.Overall monitoring, reporting, and management until closure.Other Projects:Analysis of Teams meeting QoS and recommendations for improvement.Support for the implementation of Teams webinars.Participation in the migration of personal drives to OneDrive.Decommissioning of collaborative solutions.
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Education
- BTS CIRALycée René Descartes Saint genis laval2007
- State Title Level 3IT Maintenance and Support Manager2012