Roger Fernández Díaz
JUNIOR DATA ANALYST

ROGER FERNÁNDEZ DÍAZ

Lisboa, Portugal | Nacionalidad: Colombiana

Autorização de residência e trabalho em Portugal válida

PROFESSIONAL PROFILE

Junior Data Analyst with a Mechanical Engineering background and international experience in information analysis, operational management, performance monitoring, and incident resolution within multicultural environments. Experienced in collecting, validating, and interpreting data to support decision-making, reporting, trend identification, and process improvement initiatives.

Proven ability to work with large volumes of information, identify inconsistencies, perform root cause analysis, and produce accurate reports for business stakeholders. Analytical, detail-oriented, and results-driven professional with strong problem-solving and communication skills.

PROFESSIONAL EXPERIENCE

2024 - PRESENT

Customer Support & Operations Data Specialist

Hotel Turim Lisboa - Lisbon, Portugal

  • Analyzed operational and customer service data to identify trends, incidents, and improvement opportunities.
  • Prepared operational reports and maintained accurate documentation to support decision-making.
  • Identified recurring issues through data analysis and coordinated solutions with multiple departments.
  • Managed sensitive information while ensuring data accuracy and compliance with internal procedures.
2023

Operations & Customer Data Assistant

Verso em Pedras Restaurant - Porto, Portugal

  • Monitored operational information and customer feedback to support service improvements.
  • Produced internal reports and tracked performance indicators (KPIs).
  • Analyzed recurring customer issues and supported process optimization initiatives.
  • Maintained operational records and ensured data quality and consistency.
2013 - 2020

Air Force Officer & Operational Statistics Analyst

Colombian Air Force - Colombia

  • Served as military pilot conducting operational, training, and mission-related flights.
  • Collected, monitored, and analyzed flight-hour data across multiple aircraft fleets, operational units, and regions of the country.
  • Developed operational reports and performance analyses to support strategic and operational decision-making.
  • Evaluated aircraft utilization trends and operational efficiency to recommend maintenance planning and resource allocation.
  • Analyzed mission performance indicators to support decisions regarding the expansion, optimization, or reduction of operational activities.
  • Maintained and validated operational databases, ensuring data accuracy and reliability for command-level reporting.
2018

Financial Investment Analyst

Private Investment Company - Colombia

  • Analyzed financial data and investment performance to support business decisions.
  • Managed and monitored financial databases and investment records.
  • Developed analytical reports and dashboards to track key performance indicators.
  • Performed data validation and identified inconsistencies to improve information quality.
  • Supported risk assessment through financial and market trend analysis.

EDUCATION

Mechanical Engineering

Universidad Marco Fidel Suárez - Colombia

Completed in 2013

Microsoft Data Analysis Specialized Program

Microsoft Academy Online

Skills: SQL, Excel & Power BI

Customer Service Course

Online Program - Spain

TECHNICAL SKILLS

Excel Advanced SQL Python Power BI Power Query Data Cleaning KPI Analysis

LANGUAGES

Spanish Native (C2)
English Intermediate (B2)
Portuguese Intermediate (B2)