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Guillaume SchlesserGS

Guillaume Schlesser

Activity Manager / Production Runner

€450/day
Seclin, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Guillaume

Independent in managing his company. Application Manager. Production Runner & Support Engineer. My goal is to ensure production runs smoothly, to satisfy and find solutions for clients and end-users, and to protect developers from problems that may occur by performing initial analyses to pinpoint the issue for correction.
  • French

    Native or bilingual

  • English

    Conversational

Can work on-site
Seclin (up to 30km), Villeneuve-d'Ascq (up to 20km)

Experience

  • Schless'Sphere Solutions
    Company Management - Client Assignments
    July 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.
    Administrative Accounting Organization
  • Decathlon
    Support Engineer / Decathlon
    June 2022 - December 2025 (3 years and 6 months)
    Villeneuve-d'Ascq, France
    Within 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.
    Ticketing IT Support Datadog Gravitee SQL
  • Auchan Retail
    Activity Manager
    January 2019 - June 2022 (3 years and 5 months)
    Project: Authentication/SSO – Identity Management
    Within 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

  • ISEN
    2013

Skill set

Categories

  • Other