About Guillaume
French
Native or bilingual
English
Conversational
Experience
- Schless'Sphere SolutionsCompany Management - Client AssignmentsJuly 2025 - Today (11 months)Management of my service company.Administrative management, accounting management in liaison with my accounting firm.IT service assignments focused on Level 2/3 support, production, and customer focus.
- DecathlonSupport Engineer / DecathlonJune 2022 - December 2025 (3 years and 6 months)Villeneuve-d'Ascq, FranceWithin the RUN department of Decathlon's second-hand business.• - Provided Level 2 support for Decathlon Occasions' second-hand business upon my arrival in 2022, which later became Decathlon Seconde Vie.• - Drafted resolution procedures for the Level 1 / HelpDesk team.• - Communicated on incidents using the application status tool.• - Collaborated with the customer relations representative to help agents become self-sufficient in resolving second-hand business issues with customers.• - Regular exchange with development teams for various features to get help for production investigations or to obtain information on upcoming production deployments.
- Auchan RetailActivity ManagerJanuary 2019 - June 2022 (3 years and 5 months)Project: Authentication/SSO – Identity ManagementWithin the Identity Management department of Auchan France (LDAP then later SSO during the assignment).• - Level 3 application support for Auchan's LDAP and its management tool (Tivoli).• - Training for Level 2 support provided by Sopra Steria and drafting of procedures.• - Referent for LDAP.• - Following a reorganization within Auchan, created a Digital Identity Management team responsible for Auchan France's LDAP + SSO (CAS) and authentication tools.• - Added new applications to the SSO to enable secure and automatic authentication.• - Managed a backlog of evolution requests.• - All while still overseeing Level 2. Took back Level 2 within the Level 3 team after the contract with Sopra Steria ended. Level 2 was no longer being provided due to lack of time and resources within the Level 3 team to handle both levels. Requested emergency recruitment.
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Education
- ISEN2013
Skill set
Categories
- Other