Thomas R.-BI Consultant and Power BI Developer

Check rate
Experience
Power BI Consultant
Focus:
Consulting in reporting and project management for Power BI
Goal:
Creation of IT application dashboards for business areas
Activities:
- Technical consulting and support in managing and coordinating an existing reporting setup
- Structured collection, analysis, and preparation of business reporting requirements
- Technical coordination with defined internal contacts
- Design and optimization of Power BI reports to improve data analysis
- Development of concepts and recommendations for the further development of an efficient and transparent reporting system
- Support in the user-friendly visualization of relevant company KPIs as a basis for decision-making
Tools/Skills: MS-PowerBI, DAX, MS-Office 365, PowerQuery M, BCS
Power BI Consultant
Focus:
BI consulting and Power BI, architecture and calculations
Goal:
Interim support for staff absence, maintenance, and further development
Activities:
- Support of the existing reporting system
- Moving business logic into the preparation layer rather than the presentation layer
- Consulting on systemic changes and the integration of data sources
- General consulting on data architecture and data models
- Documentation, transparency, and knowledge transfer
Tools/Skills: MS-PowerBI, DAX, MS-Office 365, PowerQuery M, Hamburger Software, Staffit Pro, DATEV
Power BI Consultant
Enertrag SE
Renewable Energy
Focus:
BI consulting and Power BI / MS-Fabric / ETL development
Goal:
Development of a cloud solution in MS-Fabric
Activities:
- Create transparency around data quality and define a reliable data architecture
- Clear, well-founded definition of KPIs, reports, and visualizations
- Development of high-performance, analytically meaningful data models based on the star schema or the bottom-up Kimball approach as a foundation for Power BI
- Planning, implementation, testing, and deployment of RLS and OLS for the user group
- Provision of meaningful, user-focused dashboards.
- Data migration, transformation, and modeling (concept and development)
- Visualization in PowerBI and creation, further development, and improvement of existing BI reports
- Documentation, knowledge transfer, MS-SQL, Oracle, Power Query, Power BI
Tools/Skills: MS-PowerBI, DAX, MS-Office 365, PowerQuery M, PowerAutomate, SharePoint, SQL (MS-SQL, Oracle), MS Fabric, pySpark, KQL
Power BI Specialist
Mainzer Datenfabrik
Logistics and Transport
Focus:
BI consulting and Power BI / MS-Fabric development
Goal:
Development of a cloud solution in MS-Fabric
Activities:
- Data migration, transformation, and modeling (concept and development)
- Visualization in PowerBI and creation, further development, and improvement of existing BI reports.
- Documentation, knowledge transfer, MS-SQL, Oracle, Power Query, Power BI
Tools/Skills: MS-PowerBI, DAX, MS-Office 365, PowerQuery M, PowerAutomate, SharePoint, SQL (MS-SQL, Oracle), MS Fabric
BI Consultant and Power BI Developer
Plusnet GmbH
Telecommunications
Focus:
BI consulting and Power BI development
Goal:
Expansion and optimization of existing Power BI reporting
Activities:
- In-depth forensics of old and new data sources
- Further development of existing reports and creation of new data analyses
- Data preparation (star schema) from source systems and semantic models
- Integration of RLS to restrict data visibility for users outside the department
- Integration of Azure DevOps
Tools/Skills: MS-PowerBI, DAX, MS-Office 365, PowerQuery, M, PowerAutomate, Redmine, SharePoint, SQL (T-SQL, Oracle), MS Fabric
Business Analyst, BI Consultant and Power BI Developer
audioprotect AG
PPE Personal Protective Equipment
Focus:
Conducting a sales potential analysis for Switzerland
Objective:
Identifying sales weaknesses and sales controlling
Activities:
- Tracking changes in the assignment of localities to political municipalities (SCD2)
- Researching, modeling, preparing and calculating potential data
- Geographical allocation / cleansing of the customer base
- Aggregating and regionalizing sales
- Generating regional sales territories (routing, based on customer and potential shares, etc.)
- Cartographic and tabular presentation of results, result documentation
- Deriving recommended measures to increase market penetration
Tools/Skills: MS-PowerBI, Power Query, M, DAX, Jet-SQL (MS-Access), GfK RegioGraph
Business Analyst, BI Consultant and Power BI Developer
elacin GmbH
PPE Personal Protective Equipment
Focus:
Conducting a sales potential analysis for Germany
Objective:
Identifying sales weaknesses and sales controlling
Activities:
- Researching, modeling, preparing and calculating potential data
- Geographical allocation / cleansing of the customer base
- Aggregating and regionalizing sales
- Generating regional sales territories (routing, based on customer and potential shares, etc.)
- Cartographic and tabular presentation of results, result documentation
- Deriving recommended measures to increase market penetration
Tools/Skills: MS-PowerBI, Power Query, M, DAX, M, Jet-SQL (MS-Access), GfK RegioGraph
MS Power BI / MS SQL Developer
EWR AG
Energy Sector
Focus:
MS Power BI / MS SQL development
Objective:
Building a reporting platform based on Microsoft Power BI
Activities:
- Designing use cases with the specialist departments
- Developing performance-optimized dashboards
- Analyzing the usability of existing dashboards and optimizing them
- Structuring reporting requirements
- Providing advice outside the role but related to data protection law on the use of personal data with regard to identifiability, including
- Restricting data visibility according to RLS and OLS
- Further developing the central data warehouse architecture (MS Fabric)
- Creating semantic models based on star schema approaches
- Creating SQL queries and reports
- Designing and developing analytical databases
- System documentation
Tools/Skills: MS-PowerBI, DAX, MS-Office 365, PowerQuery, M, MS-SQL-Server, SSIS, SSRS, PowerAutomate, Microsoft Fabric
BI Consultant and Power BI Developer
Plusnet GmbH
Telecommunications
Focus:
BI consulting and Power BI development
Objective:
Building a reporting platform with Microsoft Power BI
Activities:
- Providing reports, dashboards and analyses
- Further developing existing reports and creating new data analyses
- Migrating existing reports to Power BI
- Creating semantic models and datasets according to the star schema
- Preparing data in accordance with data protection requirements for HR/Jus and internal training on handling personal data
- Setting up RLS for data visibility when using data from HR
- NPS, target group selection, evaluation
Tools/Skills: MS-PowerBI, DAX, MS-Office 365, PowerQuery, M, PowerAutomate, Confluence, SharePoint, SQL (MariaDB, MySQL, PostgreSQL, Oracle)
BI Consultant and Power BI Developer
Deutsche Post
Logistics
Focus:
BI consulting and Power BI development
Objective:
Proof of Concept (PoC) for a Power BI reporting platform
Activities:
- Identifying relevant data sources and stakeholders
- Designing consolidation logic and data design
- Developing dashboards and interactive visualizations
- Implementing the reporting structure in compliance with data protection requirements
Tools/Skills: MS-Office 2013, SQL-Server 2019, MDX, M, DAX, T-SQL, PowerBI, SharePoint, SSIS, SSAS, SSRS
External BI Consultant
L’Oréal Deutschland
Cosmetics industry
Focus:
Data quality assurance, ETL/CUBE loading procedures, reporting
Goal:
Migration from SAP BW to Microsoft BI, ensuring data quality
Responsibilities:
- Monitoring ETL processes, test and validation procedures
- Developing new CUBE loads for the D-A-CH region
- Reporting with MS-Excel, SSRS and Power BI
- Creating datasets/semantic models based on star schema for division-specific BI teams
- Authorization management (Active Directory)
Tools/Skills: MS-Office 2019/365, SQL-Server, VBA, MDX, M, DAX, T-SQL, PowerBI, SharePoint
VBA Developer and MS-Office Developer
DHL
Logistics
Focus:
Development of an HR reporting tool
Goal:
Development of an Excel-based processing tool for maintaining master data
Responsibilities:
- Connecting SharePoint data
- Developing plausibility checks and validation procedures
- User training and coaching
Tools/Skills: MS-Excel, VBA, SharePoint
MS-Access and VBA Developer
Deutsche Bahn
Logistics
Focus:
Reporting & database adjustments
Goal:
Improvement of Excel reporting and Access database
Responsibilities:
- Development of VBA and SQL procedures
- Rollout and adjustments
Tools/Skills: MS-Excel 2010, MS-Access 2010, PL/2 AS400, VBA
SQL, VBA and MS-Access Developer
ISTA
Real estate services
Focus:
Campaign management, selection, quality assurance, migrations
Goal:
Providing data for campaign planning from various source systems, data reconciliation, quality checks, data corrections, knowledge transfer
Responsibilities:
- Data imports and exports from source to target systems
- Procedural data processing
- Ad hoc selections
- Further development of campaign tools
- Support with the migration from the parallel Office environment to QlikSense
- Development of (semi-)automated correction processes and tools for incorrectly captured data.
Tools / Skills: MS-Access 2003/2013, MS-Dynamix, MS-SQL-Server, T-SQL, MS-Excel, VBA
External BI Consultant
MVZ
Ophthalmic care
Focus:
Regional potential analyses for an operational ophthalmology center on the Lower Rhine
Goals:
Expansion of the surgical services, estimation of market coverage
Responsibilities:
- Derivation / validation of market potential, research (DeStatis, GfK, mb-research)
- Data preparation, imports, calculations and reporting.
- Visualization with desktop mapping software RegioGraph
- Reporting, address research and validation (established physicians), geocoding
- Competitive environment
Tools / Skills: Data storage with MS-Access, visualization with RegioGraph, reporting with MS-Excel
MS Access and VBA Developer
Philips
ECG Electronic Consumer Goods
Focus:
Reporting and consulting on field consulting and merchandising assignments (FB/MD) for ECG manufacturers
Objectives:
Gaining insights into the quality of FB/MD assignments in stores by analyzing the additional sales uplift generated by these assignments, FB/MD classification
Activities:
- Data imports and exports from source to target systems
- Procedural data preparation
- Ad hoc analyses
- Further development of reporting tools (infrastructure, content, KPIs, insights)
- Migration of the Office environment to MS-SQL-Server
- Introduction of SSRS and Power BI to standardize reporting
- Measuring sales support measures in terms of the markup generated
Tools / Skills: MS-SQL-Server, T-SQL, SSIS, ADO-DB via MS-Access / MS-Excel, VBA, pivot reporting with MS-Excel, Power BI
SQL and MS Access Developer
Inlingua
Educational institution
Focus:
Maintenance and ensuring the functionality of databases
Objectives:
Taking over the existing database environment after the death of the previous provider
Activities:
- Maintenance, assistance, user support
- Integration of new tasks and procedures for third-party forms
- Definition of permissions, stored procedure definition
- Automation of exam registrations with BAMF
Tools / Skills MS-SQL-Server, MS-Access 2007 with ADP connection, T-SQL
Customer classification, location analysis
Medical aids (focus hearing)
DWH design, ETL processes, reporting
Crafts
Process definition for online surveys, automated analyses
Mercuri
Management consulting
Change Management, Sales Consulting
Ferchau
Recruitment
Planning a Customer and Order Database
Veterinary Medical Laboratory
Automated Documentation Processes
Siemens
Mechanical Engineering
Various BI, CRM, and Reporting Projects
Various Industries
BI Analysis Project for National Sales
Toshiba
Consumer Electronics
IT consulting and data integration
EON
Energy industry
Development of information platform for sales and marketing
LanXess
Industry
BI and CRM solutions for hospital management
Healthcare
IT Consultant
Self-employed IT consultant since 2005
Supply Chain Manager
Zassenhaus GmbH
Senior Consultant
KM-Consultants
Wholesale and Foreign Trade Merchant
Feinpapier
OG d. R.
Bundeswehr
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Professional Services, Manufacturing, Healthcare, Cosmetics, Retail, and Utilities.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Business Intelligence, Sales, Research and Development, Logistics, and Procurement.
Summary
- Focus on Business Intelligence (BI), data analysis, reporting, database development.
- Self-employed IT consultant since 2005
Languages
Education
Groß- und Außenhandelskaufmann, Feinpapier
Abitur
Wirtschaftswissenschaften (VWL, Ökonometrie, Statistik)
Certifications & licenses
AI Agent with OpenAI
Coursera
Claude AI für Fortgeschrittene
LinkedIn Learning
Claude Cowork
LinkedIn Learning
Claude Vibe Coding
LinkedIn Learning
Künstliche Intelligenz für Cybersicherheit
LinkedIn Learning
MS Certified: Fabric Analytic Engineer Associate
Microsoft, Pearson Vue
n8n: KI-Agenten per Text und Sprache steuern
LinkedIn Learning
Datenanalyse mit KI
LinkedIn Learning
EU AI Act Artikel 4: KI-Kompetenz im Unternehmen
LinkedIn Learning
Generative AI Leader
Google Learning
IT-Sicherheit: Governance, Risk und Compliance
LinkedIn Learning
Informationssicherheit Grundlagen
LinkedIn Learning
KI für die Leitungsebene
LinkedIn Learning
KI-Agenten mit n8n erstellen
LinkedIn Learning
Microsoft, Pearson Vue
Power BI mit Python
LinkedIn Learning
Power BI mit R
LinkedIn Learning
Python: Datenanalyse mit Pandas
LinkedIn Learning
Python: Datenvisualisierung mit Matplotlib
LinkedIn Learning
Zeitreihenanalysen und Prognosen mit Python
LinkedIn Learning
People Cert
PersCert TÜV
Statistics
Experience
Global experience
Expertise
Qualifications
Frequently asked questions
Have questions? Find more information here.
Thomas is based in Cologne, Germany and prefers 100% remote projects.
Thomas speaks the following languages: German (Native), English (Advanced).
Thomas has at least 33 years of experience. During this time, Thomas has worked in at least 27 different roles and for 24 different companies. The average length of individual experience is 1 year. Note that Thomas may not have shared all experience and actually has more experience.
Based on recent experience, Thomas would be well-suited for roles such as: Power BI Consultant, Power BI Specialist, BI Consultant and Power BI Developer.
Thomas's most recent position is Power BI Consultant.
In recent years, Thomas has worked for Enertrag SE, Mainzer Datenfabrik, Plusnet GmbH, audioprotect AG, and elacin GmbH.
Thomas is most experienced in industries like Professional Services, Manufacturing, and Healthcare. Thomas also has some experience in Retail, Cosmetics, and Utilities.
Thomas is most experienced in business areas like Information Technology, Business Intelligence, and Sales. Thomas also has some experience in Research and Development, Logistics, and Procurement.
Thomas has recently worked in industries like Professional Services, Telecommunication, and Information Technology.
Thomas has recently worked in business areas like Information Technology, Business Intelligence, and Project Management.
Thomas attended education in Groß- und Außenhandelskaufmann, Feinpapier.
Thomas has 22 certificates. Among them, these include: AI Agent with OpenAI, Claude AI für Fortgeschrittene, and Claude Cowork.
The availability of Thomas needs to be confirmed.
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Calculated based on our freelancers’ daily rates as of 5 Nov 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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