VASILEIOS KATSIKAS
Data Scientist
Athens
Summary
Aspiring Data Scientist with 8+ years of experience in procurement and supply chain management, transitioning to data analytics and business intelligence. Adept at uncovering actionable insights through data analysis, reporting, and visualization. Combines operational expertise with advanced technical skills in Python, SQL, Power BI, and Excel to solve complex problems and drive decision-making. Passionate about leveraging data to deliver impactful results in dynamic, fast-paced environments.
Overview
9
9
years of professional experience
1
1
Certification
Education
Data Science Bootcamp -
04-2025
500 hours hands-on training program in Data Science and Machine Learning
• Git - Version Control, Command line, Python for Data Science
• Databases (SQL, MongoDB), APIs & Web Scraping
• EDA & Data Cleaning (Pandas, NumPy, Regex)
• Big Data & Natural Language Processing
• Machine Learning (Scikit Learn), Deep Learning (Keras)
• Visualizations (Power BI, Matplotlib, Seaborn, Streamlit, Plotly)
• Business Presentations & Communication Skills
Bachelor’s Degree - Military Science and Operational Studies
06.2016
GPA: Distinction (8,7)
Chemical Engineering
02-2023
Successfully passed the entry exams in 2023. Enrolled student with partial attendance due to professional commitments.
Work History
Supplies & Services Procurement Manager | Tender Specialist
Hellenic Army
08.2022 - Current
- Conducted evaluations of company bids, achieving 100% compliance with technical and financial requirements
- Served on procurement committees, overseeing contracts exceeding €20M annually
- Streamlined document processing in the Greek Electronic Public Procurement System, maintaining 99% accuracy for 200+ documents monthly
- Drafted evaluation reports and provided advisory expertise to ensure transparency and regulatory compliance
Logistics and Supply Chain Manager
Hellenic Army
08.2018 - 08.2022
- Optimized supply chain workflows, increasing efficiency and reducing bottlenecks
- Maintained and managed inventory valued at €5M
- Enhanced team morale and collaboration through clear communication and structured operations
Platoon Leader (OF-1) | Recruit Training Center
Hellenic Army
07.2016 - 07.2018
- Trained and mentored over 40 recruits, achieving 100% compliance with training objectives
- Designed and implemented training programs, incorporating operational and logistical planning
Skills
- Advanced Excel
- SQL
- Python
- Pandas
- NumPy
- Power BI
- Matplotlib
- Seaborn
- Plotly
- Analytical mindset
- Team leadership
- Stakeholder collaboration
- Process optimization
- BeautifulSoup
- Streamlit
- Supplier management
Projects
- US Accidents
Analyzed accident trends across the United States, focusing on severity, geographical hotspots, and seasonal patterns to identify key factors contributing to road safety.
- Netflix Insights: Trends and API Analysis
Examined Netflix's catalog to uncover trends in content and geographical distribution. Utilized Python libraries and APIs to deliver visually engaging analytics.
- PAOK FC Player Performance
Scraped and analyzed player performance data from the PAOK FC site, using Python and Power BI to create interactive dashboards covering key performance metrics.
- Sleep, Health, and Lifestyle Metrics
Explored the relationships between sleep quality, stress levels, and lifestyle factors, visualizing insights through Power BI dashboards and a Streamlit app.
Certification
- Data Science Summer School | Workearly Greece
- Python | Big Blue Data Academy
- PowerBI | Big Blue Data Academy
- SQL | Big Blue Data Academy
- Exploratory Data Analysis (EDA) | Big Blue Data Academy
- Introduction to Data Analysis using Microsoft Excel | Coursera
- Business Analytics with Excel: Elementary to Advanced | Johns Hopkins University
- Nanodegree: Introduction to Programming | Udacity
Languages
Greek
Native language
English
Proficient
C2
Hobbies and Interests
- Football
- Gym
- Motorbike trips
- Exploring data visualization and analytics projects in spare time
Timeline
Supplies & Services Procurement Manager | Tender Specialist - Hellenic Army
08.2022 - Current
Logistics and Supply Chain Manager - Hellenic Army
08.2018 - 08.2022
Platoon Leader (OF-1) | Recruit Training Center - Hellenic Army
07.2016 - 07.2018
- Data Science Summer School | Workearly Greece
- Python | Big Blue Data Academy
- PowerBI | Big Blue Data Academy
- SQL | Big Blue Data Academy
- Exploratory Data Analysis (EDA) | Big Blue Data Academy
- Introduction to Data Analysis using Microsoft Excel | Coursera
- Business Analytics with Excel: Elementary to Advanced | Johns Hopkins University
- Nanodegree: Introduction to Programming | Udacity
Big Blue Data Academy - Data Science Bootcamp,
Hellenic Army Academy - Bachelor’s Degree, Military Science and Operational Studies
National Technical University of Athens - , Chemical Engineering
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