Олена

Olena Kolisnyk
Data Analyst | Process Optimization
[открыть контакты](см. выше в блоке «контактная информация») [открыть контакты](см. выше в блоке «контактная информация») Yerky, Cherkasy Oblast, Ukraine ·
Olena Kolisnyk Telegram Olena Kolisnyk

Profile
Data Analyst. Transforming data into actionable insights for decision-makers in distribution, retail, construction, and healthcare. Proficient
in SQL, Excel/Google Sheets, Python (Pandas), and Tableau, with hands-on experience in metric analysis, dashboard development, and
automated reporting. A solid foundation in tenders, logistics, document management, and supply chain management, where I applied
analytical thinking to process optimization and solving complex, non-standard problems. Strong cross-functional collaboration and client
communication skills. Currently seeking a position where I can apply data analytics to improve procurement, logistics, and operational
efficiency.

Professional Experience
09/2025 Data Analyst (Project Work)
• Sales analytics, dashboards, reporting automation: built Tableau/Looker Studio dashboards for revenue and
margin, with scheduled refresh and consistent KPI definitions.
• Data integration & cleaning: combined Excel and BigQuery sources, standardized data types/reference tables,
removed duplicates and missing values, which increased key-metric accuracy by about 10–15%.
06/2021 – 05/2025 Internal Auditor
Odesa LLC Rostdorstroy
• Conducted cost-efficiency audits, reducing overhead expenses by 20% through targeted analysis and process
adjustments.
• Designed standardized Excel templates to streamline reporting and eliminate duplication across
departments.
• Collaborated with finance and logistics teams to enhance transparency in operational workflows and
decision-making.
• Analyzed and controlled purchase prices, performed cost audits, and prepared actionable management
reports.
• Streamlined procurement workflow by implementing approval templates, reducing cycle time by 25% and
improving budget visibility.
• Managed a supplier base of over 50 vendors, ensuring payment control and timely deliveries with SLA
adherence ≥75%.
04/2021 – 06/2021 Regional Manager
Odesa St. Catherine Clinic
• Sourced and onboarded corporate clients; led negotiations and contract signing.
• Achieved a contract renewal rate of at least 90%.
• Kept the average lead-to-contract cycle to no more than 21 days
03/2019 – 04/2021 Regional Manager
Odesa DC Link
• Managed tenders and marketplace bids: application preparation, price calculations, and end-to-end support.
• Submitted more than 50 bids and won more than 15 tenders (win rate about 30%).
• Coordinated logistics: maintained on-time shipments at least 96% and reduced shipment delays by 20%
2007 – 2019 AMA LLC (2018–2019): achieved between 105% and 115% of the monthly sales target. Suzirya Striltsia LLC
(2014–2016): reduced returns by 12%, customer satisfaction score 4.6/5.
TechnoRay (2012–2014): optimized the product mix, increasing turnover by 20% and reducing stockouts by
30%.
Stinol Ukraine (2007–2010): delivered sales at 110% of plan and reduced warranty returns by 15%

Education
07/2025 – 09/2025 Data Analytics Program
Mate Academy (Ukraine)
Focus: SQL, Python, Tableau, A/B Testing, Business Intelligence
Self-Study: Google Colab projects in Data Analytics & AI automation
2010 – 2012 Bachelor’s program (incomplete), Economics Faculty — Management of Organizations
Ukraine, Odesa National Odessa Maritime University (Odesa, Ukraine)
Skills
Core Skills Soft Skills: Languages:
Data Analytics: SQL (BigQuery), Python Structured thinking, attention to detail, English – Intermediate (strong written
(pandas, NumPy), Tableau, Google Sheets, stakeholder communication communication, actively improving for
Looker Studio professional collaboration).Experience
Statistics & Testing: A/B Testing, working remotely and coordinating across
Hypothesis Testing, Regression Analysis time zones.
Automation & AI Tools: ChatGPT API, Data
Ukrainian (native)
Cleaning Scripts, Workflow Optimization

Projects
09/2025 – 10/2025 E-commerce Funnel Optimization | Python + Tableau
Analyzed user sessions and conversion metrics to identify a drop-off at checkout; visualized funnel
performance in Tableau and recommended UI changes that improved conversion.
Stack: SQL, Python, Tableau | Focus: funnel analysis, automation
08/2025 – 08/2025 Sales analytics platform
Multi-level analysis of events, countries, and products in Google Sheets
Build analytical templates using formulas, conditional formatting, and filters
Stack: Google Sheets

Global Collaboration
Experience working with distributed, remote teams.
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Confident in written communication and improving English fluency for global collaboration.
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Comfortable working across time zones and coordinating async communication.
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Collaborated cross-functionally to align data insights with business goals
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