Maryna

Maryna Kolisnichenko
[open contact info](look above in the "contact info" section) - [open contact info](look above in the "contact info" section) - Vyshneve, Kyiv, Ukraine. -
[open contact info](look above in the "contact info" section) - @Maryna_Kolis
Junior BI Analyst

SUMMARY
Junior BI Analyst with hands-on experience building interactive dashboards to monitor business performance and support decision-making.
Skilled in Power BI, Tableau, SQL, Looker Studio and Excel for transforming raw data into structured reports and KPI-driven visualizations.
Experienced in revenue analysis, trend monitoring, and performance tracking through BI dashboards. Applied data modeling, DAX measures,
and SQL queries to deliver insights for operational and marketing reporting.
Strong analytical thinking and ability to translate business needs into clear data visualizations.
HARD SKILLS
SQL, Data Visualization, Dashboard Development, KPI Monitoring, Reporting, Trend Analysis, Data Modeling, DAX, Power Query,
Business Intelligence, Revenue Analysis
TOOLS
Power BI, Tableau, Looker Studio, PostgreSQL, BigQuery, Excel, Google Sheets
WORK EXPERIENCE
Buyer | Sales & Customer Data Analysis
Self-employed | 2010 – Present
Analyzed order, revenue, and customer behavior data using Google Sheets to identify seasonal demand trends and support product
sourcing decisions.
Maintained and structured client and order datasets for efficient tracking, reporting, and performance monitoring.
Conducted revenue and refund analysis to evaluate product performance and optimize purchasing strategy.
Identified top-performing product categories and seasonal patterns through sales data analysis.
Created analytical reports to support operational and marketing decisions.
Designed promotional content (static and animated banners in Canva) and managed social media updates.
Key Achievements
Automated order tracking system in Google Sheets, improving reporting efficiency.
Built and maintained a loyal client base of returning customers through data-informed decision-making.
Delivered regular analytical reports based on order and customer data.
PROJECT EXPERIENCE
User Activity & Revenue Dashboard | Power BI
Tools: Power BI, DAX, Power Query
https://github.com/marusa07201/powerbi-user-activity-dashboard
Developed an interactive BI dashboard to monitor user activity and revenue KPIs.
Implemented DAX measures to track Total and Net Revenue.
Enabled performance monitoring through dynamic filters and visualizations.
Superstore Sales Dashboard | Tableau
Tools: Tableau, Google Sheets, Excel
https://public.tableau.com/app/profile/maryna.kolisnichenko6018/viz/Project_2_17604718051330/Dashboard1
Built a BI dashboard to track sales, profit, and delivery performance.
Visualized key business metrics across regions and customer segments.
Enabled stakeholder reporting through interactive dashboard views.
Revenue Analysis Project | SQL
Tools: PostgreSQL, SQL
https://github.com/marusa07201/sql-revenue-analysis
Performed revenue and refund rate analysis using SQL.
Used window functions and CTEs to calculate revenue contribution.
Generated monthly revenue trends and running totals.
EDUCATION
IT School “GoIT” – Data Analysis (2025)
Kyiv National Economic University named after Vadym Hetman – Bachelor’s degree, Accounting and Auditing (2003–2011, with academic
leave for maternity)
LANGUAGES
English – Intermediate (B1)
Ukrainian - Native