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Credentials — Gemel Data Intelligence
References · Projects · Certifications

Expertise you can verify.

Over 10 enterprise clients across automotive, industrial, energy and infrastructure. More than 12 industry certifications. One senior expert — available directly to your team.

10+
Enterprise clients
12+
Certifications
10+
Years field experience
EU
Pan-European projects

Trusted by

Mercedes-Benz
Automotive · Global
TK Elevator
Industrial · Europe
SPIE
Engineering · Europe
NetzeBW
Energy · Germany

A few examples from a longer track record.

Over 10 years of enterprise engagements across automotive, industrial, energy and engineering sectors. Below are a handful of recent projects — each one illustrating what senior, hands-on expertise delivers in practice.

Mercedes-Benz Mobility
Vehicle Booking System (VBS) — Global Data Platform
Data Engineering
Challenge
Mercedes needed a central analytics platform for its Vehicle Booking System (VBS) business, covering a very large and complex rental-car ecosystem across multiple markets in Europe, Asia, and the Americas. The challenge was not only the volume of data, but also the diversity of users and use cases. Different stakeholders such as dealers, business owners, and various business partners needed access to reliable insights, each from their own business perspective. At the same time, the platform had to support a broad range of analytical needs across the entire vehicle rental business, including financial performance, administrative processes, vehicle movements, test drives, revenues, contract types, fleet usage, and operational activities. The source data coming from VBS was highly operational and not directly designed for analytical reporting, which made consolidation, standardization, and interpretation significantly more difficult.
Solution
We built a centralized analytics platform on Databricks that transformed raw VBS data into a structured, analytics-ready foundation. We integrated and standardized the data, created reusable data models, and enabled consistent reporting across markets and user groups.
Outcome
The project gave Mercedes a scalable global reporting platform for its rental-car business, improved transparency and KPI consistency, and enabled users in different regions to make better and faster business decisions based on a common data foundation.
Azure DatabricksDelta LakePySparkPower BIUnity CatalogDAX
TK Elevator
IoT Analytics & Unified Fleet Reporting — Global
IoT · Analytics
Challenge
TK Elevator had millions of data points from connected elevators and escalators worldwide — but no structured way to turn that IoT data into concrete sales opportunities. Repair sales and modernisation leads were being missed because there was no analytical layer connecting equipment health, usage patterns and service needs to commercial actions.
Solution
Designed and implemented analytics models in Azure Databricks to identify repair upselling and modernisation lead generation opportunities from live IoT data — trips, alerts, errors and connectivity signals. Worked hands-on alongside TKE's IoT data expert and business leaders in daily/weekly on-site collaboration to co-create hypotheses, validate findings, and build end-to-end campaign execution — not just theoretical analysis. Unified Fleet Reporting (EOX, EA Sick Units, NxEMT). Developed global standard reports in Power BI with complex time-based DAX calculations and alert/error notebook pipelines.
Outcome
Delivered a working lead generation pipeline integrated into existing tools (Power BI, APIs, web applications) that produced measurable upselling potential — jointly running the first commercial campaigns with TKE leaders to confirm real business impact from IoT-driven insights.
Azure DatabricksDelta LakeIoT AnalyticsPower BIDAX
NetzeBW
Data Strategy 2030 & ORCA Performance Reporting
Energy · Strategy
Challenge
NetzeBW's finance division was driving a major digital transformation under their Data Strategy 2030 — with an ambitious goal to redesign core commercial processes and performance management. Their ORCA programme (Performance Reporting, Change & Automation) needed to replace fragmented reporting landscapes with a unified, data-driven performance steering system — connecting source systems, automating workflows, and delivering consistent KPIs across the organisation. The challenge required both deep technical expertise and strong business analysis capabilities simultaneously.
Solution
Delivered end-to-end implementation covering the full data stack — connecting source systems (BIANCA, MS Azure Data Lake) through Azure Databricks with PySpark, building ETL/ELT pipelines with Azure Data Factory, and designing complex Power BI dashboards with advanced DAX models. Extended the solution beyond reporting by building full Power Platform automation — Power Automate workflows, Power Apps for operational processes, and Dataverse integration with SharePoint — creating a unified end-to-end platform combining data engineering and business process automation.
Outcome
Successfully established a scalable Azure Lakehouse architecture, integrated processes and unified reporting standards for NetzeBW's finance division — delivering the analytical foundation for their Data Strategy 2030 and enabling data-driven performance steering across commercial operations.
Azure Data FactoryDatabricksPower BIPower AutomatePower AppsDataverse
SPIE
Data Integration Platform (DIP) — Azure
Data Integration
Challenge
SPIE needed to build a Data Integration Platform from scratch — a true greenfield project with no existing infrastructure, no legacy data models, and no predefined governance standards. Multiple business units had disparate data sources with no centralised storage, inconsistent data quality, and no unified analytical layer. The challenge was not just technical — it required defining the entire architecture, governance framework, security protocols and DevOps processes simultaneously, while aligning stakeholders across departments with conflicting requirements and expectations.
Solution
Designed and built a centralised Data Integration Platform on Azure Synapse Analytics — establishing the full data stack from the ground up. Developed customised ETL/ELT pipelines using Synapse Pipelines, PySpark and Delta Lake to ingest and unify data from multiple disparate sources. Implemented structured data zones (Raw / Technical / Functional / Use Case) with standardised data models, robust access controls and encryption. Set up CI/CD pipelines and DevOps processes for automated deployment and monitoring. Delivered both technical and business-oriented reports in Power BI to serve diverse analytical needs across business units.
Outcome
Delivered a scalable, secure and production-ready Data Integration Platform — giving SPIE a solid foundation for centralised data management, self-service analytics and data-driven decision making across all business units. From zero infrastructure to a fully governed, multi-source integrated platform with professional DevOps maturity.
Azure SynapsePySparkDelta LakePower BIData Modelling

We also build what we sell.

The AI Agent we offer to our clients is the same one running live on this website — qualifying your project right now. We use our own product to acquire our own clients. That is the strongest proof of concept we can offer.

AI Lead Qualification Agent
Built on Microsoft Azure · GPT-4o · Power Pages

An autonomous conversational AI agent that qualifies prospects 24/7, scores leads (Hot / Warm / Cold) and books meetings automatically — all within the client's own Microsoft tenant. 100% GDPR compliant. Deployed in 4 weeks.

Azure AI FoundryMicrosoft FabricPower BIDynamics 365 SalesLakehousePower PagesDataverseLogic AppsAzure APIM
The dogfooding proof
This very website uses the agent to qualify you as a lead — right now.

We don't pitch our AI Agent with slides. We let you experience it directly on our Talk to us page. Every visitor who interacts with it becomes a qualified lead in our Dataverse — scored, summarised, and ready for a follow-up call.

Try it live →
Melanie Ntolo — Founder, Gemel Data Intelligence
Available directly

Melanie Ntolo

Founder & Principal Expert · Gemel Data Intelligence

Senior Data & AI Expert with over 10 years of hands-on experience building enterprise data platforms and deploying AI solutions across Europe. I've worked directly with global organisations in automotive, industrial, energy and engineering — and I'm now bringing that expertise to your team, without any intermediary.

When you work with Gemel, you work with me — from the first conversation to the final delivery. No hand-offs, no junior consultants, no account managers.

Azure Data Engineer DP-203 Power BI PL-300 Fabric DP-600 Databricks Spark 12+ certifications

In their own words

"

Her ability to design, implement, and optimize complex technical solutions has been instrumental in accelerating our projects. Melanie quickly understands complex business requirements and translates them into effective, pragmatic technical solutions.

JQ
Juan A. Quintero
IoT Data Expert
TK Elevator Ibérica Holding S.L.
"

Her contribution was instrumental in building a modern, scalable and analytical-ready data foundation enabling worldwide insights. Her expertise in Databricks, Delta Lake, Power BI and data modelling was essential to the success of this strategic programme.

FM
Florian Minck
Head of Sales
Mercedes-Benz Mobility — VBS Programme
"

Frau Ntolo besitzt ein umfassendes und hervorragendes Fachwissen, mit dessen Hilfe sie auch überaus schwierige Fragen sehr erfolgreich löst. Sie verbindet exzellente technische Kompetenz mit ausgezeichnetem wirtschaftlichem Sachverstand.

BIT
Claudia Peters & Manuel Niklos
Business Unit Manager / Business Manager
BridgingIT GmbH — Senior Consultant Assessment
"

She consistently demonstrated strong cross-functional collaboration, high ownership of tasks, proactive problem solving and reliable delivery. Her professional attitude and solution-driven mindset made her a trusted expert within the project.

MB
Mercedes-Benz Programme Team
VBS Data Platform — Overall Assessment
Mercedes-Benz Mobility

Verified technical expertise

Industry-recognised certifications that validate the depth of expertise behind every Gemel engagement.

Microsoft
Azure Data Engineer Associate
DP-203
Microsoft
Power BI Data Analyst Associate
PL-300
Microsoft
Fabric Analytics Engineer Associate
DP-600
Databricks
Associate Developer for Apache Spark
PySpark · Scala

Convinced? Let's talk about your project.

You've seen the references, the outcomes and the certifications. Now let's have a direct conversation about what we can do for your organisation.