Leonardo Ceballos

What about him?

After gaining extensive experience in the humanitarian sector, Leonardo developed a strong interest in data analysis — a shift that led to a full career transformation.

He worked for eight years at the German Red Cross Headquarters as a Project Officer and Unit Assistant, where he developed guidelines to streamline training and event coordination and supported emergency aid missions by preparing logistics and resources for field delegates. During that time, he also spent a year as a freelance group fitness trainer, leading sessions to help clients improve their health and fitness.

Now, at The Data School, as a certified Tableau Data Analyst, Leonardo applied his expertise to client projects that delivered clear, actionable insights.

One project focused on switchboard and hotline performance, giving the company clear insights into call volumes, peak times, response rates, and departmental comparisons. The result: more efficient reporting and better visibility into service performance.

Another project addressed employee time tracking and capacity. By building dashboards that mapped contracts, staffing trends, absences, and working hours, Leonardo enabled teams to better understand their resources and plan ahead with confidence.

If you're looking for someone who can turn complex data into tools your team will actually use — and rely on — Leonardo is ready to help.

Examples of featured work

Examples Other certifications

Power BI Data Analyst Associate

Certifications

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