Oleksii S.
Chernigiv, Ukraine
100%
Job Success
Top Rated Plus
Expert Data Analyst: Turning Data into Insights or Academic Excellence
$35.00/hr
𝟏𝟐+ 𝐲𝐞𝐚𝐫𝐬 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 | 𝟐𝟎𝟎+ 𝐬𝐮𝐜𝐜𝐞𝐬𝐬𝐟𝐮𝐥 𝐩𝐫𝐨𝐣𝐞𝐜𝐭𝐬 | 𝐏𝐡𝐲𝐬𝐢𝐜𝐬 & 𝐌𝐚𝐭𝐡𝐞𝐦𝐚𝐭𝐢𝐜𝐬 + 𝐄𝐜𝐨𝐧𝐨𝐦𝐢𝐜𝐬 & 𝐏𝐬𝐲𝐜𝐡𝐨𝐥𝐨𝐠𝐲 𝐛𝐚𝐜𝐤𝐠𝐫𝐨𝐮𝐧𝐝
With over 12 years of experience as a data analyst across 200+ successful projects, I've established myself as a trusted analytics partner for both business professionals and academic researchers. My background in physics, mathematics, and statistics, complemented by studies in economics, sociology, and psychology, gives me a multidisciplinary perspective that enables me to extract meaningful insights from any dataset.
𝐌𝐲 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞
• 𝗣𝗿𝗼𝗴𝗿𝗮𝗺𝗺𝗶𝗻𝗴 & 𝗔𝗻𝗮𝗹𝘆𝘀𝗶𝘀 𝗧𝗼𝗼𝗹𝘀: R (primary tool), MPlus, Excel, SPSS, Stata, Python, EViews
• 𝗩𝗶𝘀𝘂𝗮𝗹𝗶𝘇𝗮𝘁𝗶𝗼𝗻 𝗧𝗼𝗼𝗹𝘀: Excel, Tableau, Power BI
• 𝗔𝗻𝗮𝗹𝘆𝘀𝗶𝘀 𝗦𝗽𝗲𝗰𝗶𝗮𝗹𝘁𝗶𝗲𝘀: Trends/Patterns Identification, Customer segmentation/Cluster Analysis, Customer Churn/Retention normal and abnormal level, Structural Equation Modeling (SEM), Confirmatory Factor Analysis (CFA), Exploratory Factor Analysis (EFA), Multivariate Regression, Time Series Analysis, Survival Analysis, Predictive Modeling, Survey Analysis
𝐖𝐡𝐚𝐭 I propose for you
1. 𝗗𝘂𝗮𝗹-𝗗𝗼𝗺𝗮𝗶𝗻 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲: I seamlessly switch between business analytics and academic research requirements, providing tailored approaches for each.
2. 𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻-𝗢𝗿𝗶𝗲𝗻𝘁𝗲𝗱 𝗔𝗻𝗮𝗹𝘆𝘀𝗶𝘀: Rather than just running numbers, I transform your data into actionable stories that identify clear trends, segments, decision points or scientific relevant results.
3. 𝗠𝗲𝘁𝗵𝗼𝗱𝗼𝗹𝗼𝗴𝗶𝗰𝗮𝗹 𝗙𝗹𝗲𝘅𝗶𝗯𝗶𝗹𝗶𝘁𝘆: I don't force your data into pre-determined analytical frameworks. Instead, I select and customize the most appropriate methodologies based on your specific research questions or business objectives.
4. 𝗙𝘂𝗹𝗹 𝗣𝗿𝗼𝗷𝗲𝗰𝘁 𝗦𝘂𝗽𝗽𝗼𝗿𝘁: Every analysis includes comprehensive documentation, visualization, methodology explanation, and ongoing support to ensure you fully understand and can confidently use the results.
5. 𝗩𝗮𝗹𝘂𝗲-𝗔𝗱𝗱𝗲𝗱 𝗜𝗻𝘀𝗶𝗴𝗵𝘁𝘀: I consistently go beyond the initial scope to extract the maximum possible insights from your data, often identifying unexpected patterns that provide additional value.
𝐅𝐨𝐫 𝐁𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐂𝐥𝐢𝐞𝐧𝐭𝐬
I translate complex data into clear business intelligence that drives decision-making:
• Customer churn/retention modeling
• Sales forecasting and demand prediction
• Market segmentation and customer behavior analysis
• Business performance metrics and KPI development
• Competitive analysis and market positioning
𝐅𝐨𝐫 𝐀𝐜𝐚𝐝𝐞𝐦𝐢𝐜 & 𝐑𝐞𝐬𝐞𝐚𝐫𝐜𝐡 𝐂𝐥𝐢𝐞𝐧𝐭𝐬
I provide robust analytical support for research at all levels:
• Dissertation and thesis statistical analysis
• Preparation of results for peer-reviewed publications
• Research design and methodology consultation
• Complex multivariate analysis with full documentation
• Interpretation of findings with relevant academic references
𝐌𝐲 𝐀𝐩𝐩𝐫𝐨𝐚𝐜𝐡 𝐭𝐨 𝐄𝐯𝐞𝐫𝐲 𝐏𝐫𝐨𝐣𝐞𝐜𝐭
1. 𝗨𝗻𝗱𝗲𝗿𝘀𝘁𝗮𝗻𝗱 your objectives and questions thoroughly before touching the data
2. 𝗔𝘀𝘀𝗲𝘀𝘀 𝗱𝗮𝘁𝗮 quality and structure to determine optimal analytical approaches
3. 𝗔𝗻𝗮𝗹𝘆𝘇𝗲 using appropriate methodologies with rigorous validation
4. 𝗩𝗶𝘀𝘂𝗮𝗹𝗶𝘇𝗲 results using clear, compelling graphics that tell the data's story
5. 𝗗𝗼𝗰𝘂𝗺𝗲𝗻𝘁 methods and findings with comprehensive yet accessible explanations
6. 𝗦𝘂𝗽𝗽𝗼𝗿𝘁 your understanding through consultation and answering questions
𝐂𝐥𝐢𝐞𝐧𝐭 𝐂𝐨𝐦𝐦𝐢𝐭𝐦𝐞𝐧𝐭
When you work with me, you partner with an analyst who treats your project as a priority. I pride myself on being:
• Responsive and accessible throughout the project lifecycle
• Meticulous about accuracy and methodological rigor
• Flexible in accommodating evolving project needs
• Committed to delivering actionable insights, not just statistical outputs
• Dedicated to your complete understanding and satisfaction
𝐑𝐞𝐚𝐝𝐲 𝐭𝐨 𝐭𝐫𝐚𝐧𝐬𝐟𝐨𝐫𝐦 𝐲𝐨𝐮𝐫 𝐝𝐚𝐭𝐚 𝐢𝐧𝐭𝐨 𝐜𝐥𝐞𝐚𝐫 𝐢𝐧𝐬𝐢𝐠𝐡𝐭𝐬 𝐭𝐡𝐚𝐭 𝐝𝐫𝐢𝐯𝐞 𝐝𝐞𝐜𝐢𝐬𝐢𝐨𝐧𝐬 𝐨𝐫 𝐬𝐭𝐫𝐞𝐧𝐠𝐭𝐡𝐞𝐧 𝐫𝐞𝐬𝐞𝐚𝐫𝐜𝐡? 𝐋𝐞𝐭'𝐬 𝐝𝐢𝐬𝐜𝐮𝐬𝐬 𝐡𝐨𝐰 𝐈 𝐜𝐚𝐧 𝐡𝐞𝐥𝐩 𝐦𝐚𝐤𝐞 𝐲𝐨𝐮𝐫 𝐝𝐚𝐭𝐚 𝐰𝐨𝐫𝐤 𝐟𝐨𝐫 𝐲𝐨𝐮.
Work history
Work history
Support with Exploratory Factor Analysis and Scale Refinement (Research Project)
Jun 5, 2025
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Jun 18, 2025
Private earnings
Database statistical analysis
Feb 26, 2025
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May 6, 2025
"As I said, thanks again and I will recontact you in the future for supplemental analysis for this project"
Private earnings
Specialist in epidemiological statistics
Nov 15, 2024
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May 2, 2025
"I would like to extend my sincere appreciation to Oleksii for his outstanding contributions as a specialist in epidemiological statistics. His analytical skills, precision, and deep understanding of complex data…
Private earnings
Basic data / Excel charting required for eCommerce site
Apr 17, 2021
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Feb 24, 2025
"Alex is a great resource for our data analysis - doing complex dashboards within Excel that are accurate and understanding our needs."
Private earnings
I need feedback from someone who is very good at mixed-effects models and linear regression.
5.0
of 1 reviews
Aug 17, 2024
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Nov 20, 2024
Sep 24, 2024
5.0
"Alex is highly skillful and knowledgeable. I was collaborating with him several times and each time I was given a personalized and strict-to-the-point feedback allowing me to understood something new…
Private earnings
Data Analyst for Churn Analysis
Dec 11, 2023
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Aug 13, 2024
Private earnings
Specialist in epidemiological statistics
Nov 30, 2023
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Jun 4, 2024
"Oleksii was instrumental in epidemiological analysis and provided high quality work in the agreed timeline. It was a pleasure working with him. Highly recommended."
Private earnings
Lookalike Modeling Data Scientist
Apr 19, 2024
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May 28, 2024
"Clear communication, completed work on a clear timeline. Nice recommendations that were not surprising, and helped us make a product decision."
Private earnings
Extra tasks
Jul 29, 2023
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Apr 13, 2024
"I have worked with Alex for a year and a little more on a huge project about CFA and SEM using the Mplus program. There were many complications and requests…
Private earnings
Statistic probability exercise
Apr 9, 2024
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Apr 11, 2024
Private earnings
SPSS and R statistical analysis for doctoral dissertation
Oct 14, 2024
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Present
Job in progress
Private earnings
Garch Models
May 21, 2024
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Present
Job in progress
Private earnings
Confirmatory Factor Analysis
Apr 18, 2024
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Present
Job in progress
Private earnings
Multilevel SEM in R
Feb 10, 2024
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Present
Job in progress
Private earnings
Statistical Analysis SPSS
Oct 8, 2023
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Present
Job in progress
Private earnings
empirical statistical analysis using Stata
Apr 22, 2023
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Present
Job in progress
Private earnings
Assessment of methodology for analyzing vaccine surveillance data
Sep 20, 2022
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Present
Job in progress
Private earnings
Generate stats tables
Feb 19, 2021
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Present
Job in progress
Private earnings
Ongoing statistical projects
Jul 23, 2019
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Present
Job in progress
Private earnings
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Skills
Skills
- R
- Statistics
- Stata
- Mathematical Modeling
- Mathematics
- Exploratory Data Analysis
- Biostatistics
- Business Mathematics
- Statistical Programming
- Factor Analysis
- Data Science
- Data Analysis
- Trend Analysis