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Térence TrolleTT

Térence Trolle

Microsoft System Administrator

€300/day
Paris, FR
3-7 years
Windows Server
Active Directory
Hyper-V
Incident Management
L2/L3 Support

Average response time: 1 hour

Freelancer profile translated to English.
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About Térence

Microsoft System Administrator focused on RUN(Maintenance in Operational Condition/Operations), I intervene to stabilize Windows production environments: reduce recurring incidents and secure existing systems, while maintaining a simple and operational approach.

What I bring, concretely

*RUN Stabilization:diagnosis, resolution, and L2/L3 support, with a "root cause" logic when incidents recur

*Clean and Managed AD:rights management, groups, OUs, delegations, cleanup, and best practices

*Coherent GPOs:standardization, hardening, alignment of workstation/user policies

*Windows Server Operations:maintenance in operational condition, changes, regular checks, and service quality maintenance

*Hyper-V:operations, incident support, best practices (basic monitoring, platform hygiene according to context)


My Method

Quick scoping → prioritization → visible actions → prevention of recurrence → documentation & transfer (procedures, instructions, checkpoints).

Keywords:Windows Server • Active Directory • GPO • L2/L3 Support • RUN • Maintenance in Operational Condition • Hyper-V

  • French

    Native or bilingual

Can work on-site
Paris (up to 50km)

Experience

  • POLICE NATIONALE
    Microsoft System Administrator
    TECH
    September 2023 - Today (2 years and 9 months)
    Créteil, France
    Interim 2024-2025: "IT Trainer" mission (return to System Administrator role afterwards).

    Co-administration of a large-scale Microsoft environment: ~2,000 workstations, ~40 servers, ~10,000 users. L2/L3 support (no L1), in a sensitive environment with high availability and traceability requirements.

    - Maintenance in operational condition of Windows Server infrastructures: incidents, changes, reliability.
    - Active Directory Administration: identity and rights management (accounts, groups, delegations).
    - GPO setup/evolution: standardization, hardening, compliance.
    - Hyper-V virtualization operations: monitoring, support, incident resolution.
    - Backup management: monitoring and restores according to procedure.
    - Documentation and technician support (transfer of best practices).
    - Maintenance in operational condition of Windows Server environments (operations, incidents, changes).
    - Hyper-V virtualization administration (monitoring, support, incident resolution).
    - Implementation and maintenance of backups: monitoring and restores according to procedures.
    - Active Directory Management: account creation, groups, and rights (access management).
    - GPO deployment and adjustment according to service needs.
    - L2/L3 support and technician support (skills transfer / best practices).
    Active Directory Windows Server L2/L3 Support Hyper-V Windows
  • POLICE NATIONALE
    IT Trainer
    PUBLIC SECTOR
    September 2024 - September 2025 (1 year)
    Draveil, France
    - Preparation and delivery of IT training (students and staff).
    - Simplification and pedagogy: making technical subjects accessible, supporting skill development.
    - Design/adaptation of training materials and scenarios from available resources.
    - Temporary mission: return to a production/infrastructure-oriented system administration role.
    Training Delivery Pedagogy
  • POLICE NATIONALE
    IT Support Technician
    TECH
    September 2022 - September 2023 (1 year)
    Créteil, France
    - On-site user support: handling and resolving incidents (L1/L2 depending on scope).
    - Preparation and configuration of hardware before deployment (workstations, peripherals).
    - Monitoring and traceability of requests/incidents via GLPI (prioritization, closure, communication).
    - Contribution to park management and continuous improvement (procedures, documentation).
    User Support Incident Management Windows Software Packages

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Education

  • BAC STI MECHANICS ENGINEERING OPTION
    Lycée Polyvalent Irène et Frédéric Joliot-Curie
    2012

Certifications

  • CLIT (Local IT and Communications Correspondent)
    National Police – Ministry of the Interior
    2023
    Incident Management Windows Server Account Management GPO User Support Active Directory

Skill set

GPO
Maintenance in Operational Condition
Data Backup and Restore
Monitoring
Pedagogy

Categories