AI Data Annotation & LLM Evaluation Specialist. Trusted by Upwork Enterprise clients for RLHF, DeepResearch response rating, chart analysis, and Q&A creation. Quantitative Economist — I catch what annotators miss. Top Rated. 100% Job Success. 5.0 ⭐ on every reviewed contract. Most annotators tick boxes. I apply statistical rigor — because I was trained as a Quantitative Economist before I was a labeler. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHAT I DO ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔹 LLM & AI Response Evaluation RLHF, DeepResearch rating, response ranking, factuality checking, hallucination detection, SFT data review, preference labeling, red-teaming. 🔹 Data Annotation & Labeling Chart analysis, Q&A pair creation, image/text classification, NER, sentiment, taxonomy design, rubric writing, annotation guidelines. 🔹 Forecasting & Predictive Analytics ARIMA, SARIMA, Prophet, LSTM, XGBoost — sales, demand, inventory, financial forecasting. 🔹 Quantitative & Econometric Modeling Regression, classification, VAR, cointegration, causal inference, Blanchard-Perotti fiscal dynamics (yes, I actually built one). 🔹 EDA & Statistical Analysis Hypothesis testing, A/B testing, outlier detection, correlation, causality — in plain English. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ TOOLKIT ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Languages: Python, R, SQL, SAS ML/Stats: Scikit-Learn, Statsmodels, XGBoost, Prophet, TensorFlow Data: Pandas, NumPy, Excel, Tableau, Power BI, Streamlit, Plotly Annotation: LabelBox, Scale, custom rubrics ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHY CLIENTS REHIRE ME ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✅ Economist brain — I think in causality, not correlation ✅ Accountable for Outcomes, Detail Oriented, Clear Communicator (real Upwork badges from real clients) ✅ No yes-man — I flag when data is lying ✅ Plain-English explanations of p-values and confidence intervals Hit "Invite to Job" — let's look at your data.

"Oskar is FANTASTIC. ... Oskar is, by far, the best I have ever had the pleasure of working with " - ⭐️⭐️⭐️⭐️⭐️ With my deep knowledge of analytical solutions to business problems, and your business expertise, together we can create great value for your business! Data so messy you can't use it for your analytical purpose? ____________________________________________ I can solve the messiest datasets and find keys to your other data! Not sure about your health app's impact on users weight? ____________________________________________ As long as the data is there, we can answer most of your questions, by cohort/sex/age/app usage etc. Validation of your financial codebase? ______________________________________ I've spent years as a Quantitative Risk Analyst working on old and new codebases, validating other teams complex models. Is your CRM actually a Google Sheet with colors? ______________________________________ Not a problem, I'll build a custom Google App Script to calculate Customer Churn based off the colors in the spreadsheet. Your whole backend basically a copy of an interns Jupyter Notebook? _______________________________________________ I'll rewrite and refactor it to meet code standards and ensure production readiness! With over 8 years of experience working with data in Finance, Statistics, and Economics, I've got a broad knowledge base, with deep knowledge of how to leverage data to drive business growth using the best technology for the task at hand! Some of the technologies I've worked with in the past: Python - Automation, Backtesting, Financial modelling, Quantitative Analysis, Web Scraping, Visualizations, Pandas, Matplotlib, Seaborn, Numpy, SciPy, Streamlit, API, Data Extraction Data - Data Analysis, Data Cleaning, Data Transformation, Data Extraction, Data Management, ETL, Automation, Data Sourcing, Data Visualisation Excel - Complex formulas, Automation, VBA Google Sheets - Complex Formulas, Dashboards, Google App Scripts, APIs R - Data, Statistics, Visualizations, Shiny, ggplot, leaflet.

I provide advanced biostatistical analysis and pharmacological expertise to support clinical research, academic projects, and scientific publications. I bring over 20 years of experience in pharmacology, teaching, and research, supported by a recent MSc in Applied Statistics that enhances my expertise in modern statistical methods and software. My work focuses on transforming complex data into accurate, interpretable, and publication-ready statistical outputs. I routinely support clients with study design, hypothesis testing, regression modelling, meta-analysis, sample size estimation, and detailed statistical reporting. I work with industry-standard tools including R, SPSS, SAS, Minitab, Jamovi, JASP, and GraphPad Prism, ensuring precision, reproducibility, and adherence to scientific standards. Having authored and co-authored numerous peer-reviewed articles and served as a reviewer and editor for high-impact journals, I understand the methodological rigor required for high-quality academic and medical research. My goal is to provide clients with clear, reliable analyses that enhance decision-making and strengthen scientific credibility. Core services include: • Medical and clinical statistics • Regression and multivariate modelling • Survival analysis and longitudinal data modelling • Meta-analysis and systematic review statistics • Power and sample size calculations • Data visualization and scientific reporting If you require accurate statistical support, professional interpretation, or assistance preparing data for publication or regulatory review, I’m ready to help deliver solutions grounded in scientific excellence.

My field of work as far is extremely Statistical Analysis, so many works I have done in it with using Excel, SPSS, SAS, R, STATA, Minitab and Power BI.

Experienced epidemiologist with a demonstrated history of working in the higher education industry. Skilled in SAS and R programming, statistical data analysis, virology, immunology, and disease surveillance. Strong research professional with a doctorate (PhD) focused in Population Health and Comparative Biomedical Sciences from The University of Georgia.

A 20-year veteran in data and analytics, I have helped organizations of all sizes deliver on their data and analytics initiatives, through data inventorying and profiling, predictive analytics, data mining and exploration, and dashboarding. I am highly experienced in tools such as SAS, R, Tableau, and Angoss, in addition to Excel and Access, and have working knowledge of SQL, Qliksense, PowerBI, and Python. I have led multi-national analytical consulting practices, with clients and colleagues from across the globe in financial services, media and communications, retail, healthcare, life sciences, public sector, as well as humanitarian response and disaster management, and have spoken at many industry conferences and forums. My prior responsibilities have included serving as the Lead Data Scientist at North Highland and leading the international analytics practice at Equifax as the Vice President of International Analytics. I hold a Master of Science degree in Statistics from Florida State University among other degrees from Florida State University and the Peabody Conservatory of the Johns Hopkins University.

I have experiences on academic and pharmaceutical areas for more than 9 years. I have help more than 20 NIH grant application, including study design, sample and power calculations, and statistical analyses. I have plenty experiences on the design of data structure before the data collection, data manipulation after data collection, DSMB and safety reports, statistical analyses, and write-up manuscripts. My skills are not only the basic statistical methods including to parametric (e.g. t-test) and non-parametric statistical tests (e.g. Wilcoxon-Mann-Whitney test), linear regression, logistic regression, ANOVA, ANCOVA, general linear regression (GLM), survival analysis, principal component analysis (PCA), etc., but also the advanced methods including longitudinal analysis (e.g. linear and non-linear mixed model, GEE), advanced survival analysis (e.g. competing risks, time-varying covariates), additive model, confirmatory factor analysis (CFA), Bayesian analysis, etc. I am co-authors for more than 40 articles and cited for more than 200 times based on Google Scholar.

Do you have a program within your public health organization that is struggling to meet deliverables? Are teams feeling misaligned? Do leaders need support navigating complex program challenges? With experience in epidemiology, program leadership, and data analytics, I help organizations identify the root causes of these challenges and develop practical solutions that improve program performance. My work focuses on improving the structure and effectiveness of public health programs, strengthening leadership alignment, and translating data into insights that support decision making. I support health departments and public health organizations with program reviews, strategic planning, and data-informed decision making for complex or grant-funded initiatives. Services I provide: * Public health program effectiveness reviews * Public Health program strategy and improvement * Leadership and program manager advisory * Translating public health data into actionable insights * Dashboard and program evaluation support If you are looking for support to improve program performance, increase team productivity and efficiency, strengthen leadership alignment, or use data more effectively to guide decisions, feel free to message me. I am happy to start with a brief conversation to better understand your goals and determine how I can support your organization.

Over the course of my career, I've developed a unique set of skills with SAS, VBA, JavaScript, HTML, REXX, COBOL, Assembler and MANY other programming languages. I have consistently demonstrated out of the box thinking and serious mad coding skills to quickly bring what most people thought was impossible, into reality. Let me work on your next project to bring your next dream to fruition!

Data Analyst & AI Automation Expert | building Power BI & Tableau dashboards, financial models, and AI automations with n8n + Claude Code. 6+ years turning raw data into decisions, and manual reporting into workflows that run themselves. I help startups, SMBs, financial services firms, e-commerce brands, and SaaS companies make sense of their data. Whether you need an interactive BI dashboard, a three-statement financial model, a SQL data pipeline, or an end-to-end automation that pulls data from your apps, cleans it, and delivers the report to your inbox — I build accurate, well-documented work designed to scale with your business. 📊 Data Analytics & Business Intelligence ✔ Executive, operational & real-time KPI dashboards — Power BI, Tableau, Looker Studio ✔ Advanced DAX measures, Power Query (M), Tableau Prep, RLS/OLS, embedded analytics ✔ Semantic data modeling — star schema, snowflake schema, calculation groups ✔ Data cleaning, profiling & transformation — Python (Pandas, NumPy), SQL, Excel ✔ ETL pipelines & data integration across CRMs, ERPs, marketing platforms, and APIs ✔ Database design & query optimization — PostgreSQL, MySQL, SQL Server, Azure SQL, Amazon RDS, BigQuery, Snowflake ✔ Web scraping & data extraction — Python (BeautifulSoup, Selenium, Scrapy) ✔ Exploratory data analysis (EDA), time series, cohort, funnel & A/B test analysis ✔ Customer segmentation, RFM, churn, retention & lifetime value (LTV) modeling ✔ Predictive modeling, regression, classification & clustering — Scikit-learn 💹 Financial Analysis & Modeling (MBA in Finance) ✔ Three-statement financial modeling — integrated P&L, balance sheet, cash flow ✔ Budgeting, forecasting, rolling forecasts & scenario modeling — FP&A dashboards ✔ Valuation — DCF, comparable companies, precedent transactions, sensitivity & Monte Carlo ✔ M&A and LBO modeling, equity research, investment memos ✔ Ratio analysis — liquidity, solvency, profitability, efficiency ✔ Variance analysis (price, volume, mix), cost analysis & segment profitability ✔ SaaS metrics — MRR, ARR, CAC, LTV, churn, payback period ✔ E-commerce analytics — AOV, conversion, customer cohorts, marketing ROI ✔ Unit economics, pricing analysis, breakeven & contribution margin ✔ 13-week cash flow models, working capital & treasury reporting ✔ Investor- and board-ready reporting packs and KPI scorecards ✔ Panel data regression & econometric analysis — SPSS, Stata, fixed effects, Hausman 🤖 AI Automation & Workflow Engineering ✔ End-to-end workflow automation with n8n (cloud & self-hosted) — data syncing, alerts, scheduled reports ✔ AI agents & agentic workflows powered by Claude and OpenAI ✔ Custom automations with Claude Code — scripting, API integrations, multi-step pipelines ✔ AI-powered data cleaning, classification, summarization & document parsing ✔ Invoice, receipt, contract & PDF processing with OCR + LLM extraction ✔ Email, CRM, Slack, Notion, Airtable & Google Workspace automation ✔ Automated report generation & branded PDF/Excel delivery pipelines (Python, Playwright, ReportLab) ✔ Lead generation, enrichment & outreach workflows ✔ Replacing manual, repetitive work across finance, operations, and marketing teams 🛠 Tools & Technologies * BI & Visualization: Power BI (DAX, RLS, Power Query, Service), Tableau (Desktop, Prep, Server, Cloud), Looker Studio * Programming: Python (Pandas, NumPy, Matplotlib, Seaborn, Scikit-learn, Plotly), SQL, VBA *Databases & Cloud: PostgreSQL, MySQL, SQL Server, Azure SQL, Amazon RDS, Amazon S3, BigQuery, Snowflake *Spreadsheets: Excel (Power Query, Power Pivot, VBA, Macros, Pivot Tables, Solver), Google Sheets (Apps Script) *Statistics & Research: SPSS, Stata, SAS — regression, panel data, time series, econometrics *AI & Automation: n8n, Claude, Claude Code, OpenAI API, Make, Zapier, webhooks, REST APIs 📁 Projects I deliver ✔ Sales, marketing, finance & operations dashboards with drill-through and dynamic filters ✔ CFO/CEO reporting packs combining BI dashboards and integrated financial models ✔ Custom KPI trackers, scorecards and benchmarking studies ✔ Automated month-end reporting and management accounts ✔ Power BI / Tableau migrations and dashboard redesigns ✔ Data warehouse design, ETL pipelines and database optimization ✔ Research dashboards for academic and policy work (panel data, macroeconomic indicators) ✔ AI agents that read your inbox, query your data, and post results to Slack ✔ End-to-end automations replacing manual spreadsheet workflows Industries I work with: SaaS, e-commerce, fintech, banking, professional services, real estate, manufacturing, healthcare, marketing agencies, and academic research. ✅ Why clients work with me ✔ Finance + data fluency — accurate numbers, clear story ✔ Validated metrics, documented models, on-time delivery ✔ Post-delivery support so your dashboards and automations keep running Send me a message with your goal. I'll tell you exactly how I'd approach it. Let's make your data work smarter.