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Marco Callejo TejeroMC

Marco Callejo Tejero

ACTUARY DATA SCIENCE

€200/day
Madrid, ES
3-7 years
Data Analysis
Microsoft Excel
Python
SQL
Microsoft Power BI

Average response time: 1 hour

Freelancer profile translated to English.
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About Marco

Data analysis and statistical modeling specialist, with a background in Financial and Actuarial Economics (UC3M) and professional experience in the Spanish insurance sector. My background combines advanced statistics, Python programming, and applied business knowledge, allowing me to tackle data projects with technical rigor and a focus on concrete results.
I can help you with exploratory analysis, predictive models, customer segmentation, forecasting, or simply organizing and understanding data you have but are not leveraging. Among my usual tools: time series (ARIMA/SARIMA), clustering, statistical simulation (Monte Carlo), and libraries like pandas, scikit-learn, matplotlib, and statsmodels. Clear communication, without unnecessary jargon.

  • Spanish

    Native or bilingual

  • English

    Fluent

Can work on-site
Madrid (up to 50km)

Experience

  • PREVENTIVA, COMPAÑÍA DE SEGUROS Y REASEGUROS, S.A.
    ACTUARY DATA SCIENCE
    BANKING AND INSURANCE
    November 2022 - Today (3 years and 7 months)
    Responsible for technical accounts, provisions, and reinsurance statistics. Calculation of reserves in Funeral and Life Insurance. Preparation and review of provision reconciliations for external audit. Responsible for the calculation of technical provisions (PPNC, PSPLP, PRC, PGILS, IBNR) Data analysis and preparation of ad hoc reports. Claims control for Non-Life products. Completion of statistical questionnaires for INESE, UNESPA, and ICEA. Automation of processes and reports. Modeler of processes for data analysis and cash flow calculations. Review and recalculation of premiums for Funeral Insurance.

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Education

  • POSTGRADUATE DEGREE
    Universidad Carlos III
    2026
    MÁSTER Ciencias Actuariales y Financieras
  • BACHELOR'S DEGREE
    Universidad Rey Juan Carlos
    2025
    Economía Financiera y Actuarial

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