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Holger ColinHC

Holger Colin

GIS Consulting

€720/day
Hanau, DE
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Holger

I support companies in using geodata efficiently and automating complex processes. With experience in ArcGIS, QGIS, FME, Python, SQL, and data pipelines, I develop scalable solutions for energy, infrastructure, and public administration. My focus is on clear workflows, clean data integration, and practical results.
  • German

    Native or bilingual

  • English

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • Westnetz/EON,
    GIS Consultant and Developer
    January 2025 - December 2025 (11 months)
    44 Dortmund, Germany
    • Consulting in the area of Oracle geodatabases
    • Workflow development in Vertigis Studio
    • Software development with Python, Typescript, SQL, HTML, and C#
  • ENBW,
    GIS Consultant and Developer
    December 2023 - October 2024 (10 months)
    76 Karlsruhe, Germany
    Creating Feature/Map Services, WMS, and WFS in ArcGIS Enterprise
    • • Coordinating GIS architecture between the ENBW ArcGIS Enterprise and a cloud-based GIS for wind farm planning
    • • Data architecture
    • • Development and implementation of interfaces in Python/ArcPy
    • • Setup and development of Vertigis, development of complex workflows and reports
    • • New and further development of FME workflows. Setup of server automations
    • • Commissioning and handover support
    • • Oracle PL/SQL database development
  • 50 Hertz,
    ArcGIS/FME Developer
    April 2023 - December 2023 (8 months)
    Berlin, Germany
    • • Building a new GIS for route projects
    • • Building applications with ArcGIS Experience Builder and ArcGIS Dashboards
    • • Development of data, processes, tools, and ETL in ArcGIS Pro, ArcGIS Online
    • • Installation and configuration of FME Flow in Microsoft Azure
    • • Development and setup of workflows
    • • Creating Feature/Map Services, WMS, and WFS in ArcGIS Enterprise
    • • Communication with system users and user training

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