Ermioni Katsouta
Business Intelligence & Data Analytics
Connecting the data · tap to enter
Ermioni Katsouta
Business Intelligence & Data Analytics

From scattered data to decisions you can trust.

Your sales live in SAP. Your orders in Shopify. The rest in fifty spreadsheets. I bring it all into one place — and turn it into dashboards you actually open every morning.

Book a free call → See my work
13+Data sources unified
40hSaved per month
1Source of truth
Executive Dashboard · Live
Revenue (MTD)
€0M
▲ 12.4% vs last month
Gross Margin
0%
▲ 2.1 pts
SAPShopifyCRM Excel ×50Google Ads→ One model
Built with
Power BIMicrosoft FabricAzure SQL ServerSnowflakeDatabricks Pythondbt
What I do

Far more than cleaning data

End-to-end Business Intelligence — from strategy and data modelling to Power BI, Microsoft Fabric, AI analytics, optimization and training.

01

Business Intelligence Strategy

Turning scattered data into a clear plan the whole company can follow.

BI RoadmapKPI DefinitionData StrategyData GovernanceDigital TransformationAnalytics Maturity
02

Power BI Development

Professional dashboards and reports built around the decisions you actually make.

Interactive DashboardsExecutive DashboardsFinancial ReportsSales AnalyticsHR AnalyticsReal-time & Mobile
03

Data Modeling

The right model underneath — fast, reliable and easy to extend.

Star SchemaSnowflake SchemaSemantic ModelsFact & DimensionMeasuresComposite Models
04

DAX Development

Advanced calculations that make the numbers actually say something.

DAX OptimizationTime IntelligenceFinancial CalculationsCustom KPIsCalculation GroupsDynamic Measures
05

Power Query & Transformation

Clean, prepared, trustworthy data before it ever reaches a report.

ETL DevelopmentData CleansingPower Query (M)Data ValidationData QualityStandardization
06

ETL & Data Integration

Connecting every source into one automated, connected pipeline.

Azure Data FactorySSISFabric PipelinesREST APIsSAP / OracleDynamics & Salesforce
07

Database Development

Solid SQL foundations, tuned for speed and reliability.

SQL ServerAzure SQLPostgreSQLStored ProceduresViewsQuery Optimization
08

Microsoft Fabric

A modern, unified data platform built on OneLake.

Fabric ImplementationLakehouseWarehouseData EngineeringReal-Time AnalyticsOneLake
09

Azure Data Platform

Scalable cloud data architecture on Microsoft Azure.

Azure SynapseData FactoryAzure SQLData LakeAnalysis ServicesFunctions
10

Performance Optimization

Making slow reports and heavy models fast again.

Report OptimizationDAX OptimizationModel OptimizationRefreshMemoryCapacity
11

Data Visualization

Design that turns dashboards into decisions.

Executive DashboardsKPI DashboardsDrill-throughBookmarksData StorytellingUX / UI
12

AI & Advanced Analytics

Looking forward, not just back at what already happened.

Predictive AnalyticsForecastingML IntegrationAI InsightsAnomaly DetectionTrend Analysis
13

Consulting

A second pair of expert eyes on your BI setup.

Architecture ReviewSolution ReviewTechnical AuditData AssessmentCode ReviewMentoring
14

Corporate Training

Upskilling your team so they truly own the tools.

Power BIDAXSQLData ModelingMicrosoft FabricBest Practices
Toolbox

Technologies I work with

The platforms, languages and tools behind every solution — chosen to fit the job, not the other way around.

BI & Reporting

Power BIAnalysis Services (SSAS)Reporting Services (SSRS)TableauQlik SenseExcel

Microsoft Fabric & Cloud

Microsoft FabricOneLakeAzureAzure SynapseAzure Data FactoryAzure Data Lake

Databases

SQL ServerAzure SQLPostgreSQLMySQLOracle Database

Data Engineering & ETL

SSISDatabricksSnowflakeREST APIsSharePoint

Languages

DAXPower Query (M)SQLPythonR

Business Apps & Sources

Dynamics 365SalesforceSAPOracleGit
Ways of working
Business AnalysisProblem SolvingProject ManagementStakeholder CommunicationAgile & ScrumData StorytellingRequirements GatheringLeadershipCustomer ConsultingDecision Support
How a project works

Ten steps, one clear outcome

A real client said: "I have data in SAP, Shopify, my CRM and 50 spreadsheets. I just want to see sales and profit every morning." Here's how that gets built.

01

Understand the need

Sit with your teams, map the real questions behind the data.

02

Connect the sources

ERP, CRM, Shopify, spreadsheets, APIs — all of them.

03

Build the pipelines

Automated flows that refresh on their own, no manual exports.

04

Clean & transform

Fix errors, unify formats, apply business rules.

05

Store it once

A single warehouse or lakehouse as the source of truth.

06

Model the business

Relationships, measures and KPIs everyone shares.

07

Build dashboards

Clear, fast Power BI reports for each audience.

08

Set permissions

The right people see exactly the right data.

09

Train the users

Managers and analysts who can run with it confidently.

10

Support & improve

Ongoing fixes, new reports and performance tuning.

Who I work with

Industries I know

Different sectors, same goal: turning operational data into a clear daily picture.

Retail

Sales, basket analysis, store and channel performance.

Manufacturing

Production, OEE, quality and inventory turnover.

Healthcare

Capacity, outcomes and operational reporting.

Finance

P&L, cash flow, budgeting and forecast accuracy.

Logistics

Delivery performance, costs and route efficiency.

Hospitality

Occupancy, RevPAR and demand forecasting.

Selected work

Case studies

Click any project to read the full story — the challenge, what I built, and the results.

SALES · MTD  ▲12%
Retail · Power BI

Sales Dashboard

Unified online and store sales into one daily view with drill-down by product, region and channel.

5→1Sources
‑90%Manual work
P&L · DAILY
Finance · Fabric

Financial Dashboard

P&L, cash flow and margin tracking refreshed automatically every morning.

DailyRefresh
+2.1ptMargin visibility
STOCK · TURNOVER
Ops · Forecasting

Inventory Optimization

Demand forecasting that cut stock-outs while freeing up tied-up working capital.

‑18%Stock-outs
‑12%Excess stock
HEADCOUNT
People · HR Analytics

HR & Executive KPIs

Headcount, attrition and a top-line executive view bringing every function onto one page.

1Exec view
6Teams aligned
Writing

From the blog

Plain-language guides on the tools and ideas behind modern analytics.

FABRIC · 6 MIN

What is Microsoft Fabric?

The all-in-one data platform explained without the buzzwords.

Read →
POWER BI · 5 MIN

Power BI vs Excel

When a spreadsheet is enough — and the exact moment you've outgrown it.

Read →
STRATEGY · 7 MIN

10 KPIs every CEO should monitor

The handful of numbers that tell you how the business is really doing.

Read →
POWER BI · 8 MIN

How to build a Sales Dashboard

A step-by-step framework, from raw data to a report people use.

Read →
DATA · 6 MIN

What is a Data Warehouse?

Why one central home for your data changes everything.

Read →
HOW-TO · 7 MIN

Connect SQL Server to Power BI

A practical guide to your first live database connection.

Read →
Ermioni Katsouta
Available for
new projects
About

Hi, I'm Ermioni — I build clarity out of messy data.

I'm a Business Intelligence & Data Analytics consultant based in Thessaloniki. I help companies stop fighting their spreadsheets and start trusting their numbers — by connecting their systems, cleaning the data, and building dashboards people actually use.

My work runs the full journey: data strategy, integration, warehousing, semantic models, Power BI, and Microsoft Fabric. The goal is always the same — fewer manual reports, faster decisions, one source of truth.

Power BIMicrosoft FabricSQLDAXPythonData WarehousingETLForecasting
Let's talk

Ready to see your data clearly?

Tell me where your data lives and what you wish you could see every morning. I'll show you what's possible.

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Office
Kapetan Kotta 9G, Pylaia
Thessaloniki 55535
Email me → Call now