Mary M.

Key Skills

Software

No software listed

Top Subject Matter

IT

Top Data Types

Image

Text

Top Task Types

Classification

Question Answering

Text Generation

Data Collection

Text Summarization

Fine-tuning

Freelancer Overview

Mary Waiyigo Macharia [email protected] Data Analyst +44 7584 731240 Results-oriented Junior Data Analyst with hands-on experience London, United Kingdom supporting data-driven decision-making through efficient data organization, analysis, and visualization. Proficient in Power BI, Tableau, advanced Excel, and SQL to gather, clean, and interpret business/operational/financial datasets. Skilled at creating clear reports and dashboards, monitoring KPIs, assisting with data integrity, and collaborating with teams to deliver actionable insights for improved processes and performance. SKILLS Data Analysis & Visualization: Power BI, Tableau, Excel (Advanced: PivotTables, Power Query, VBA, Charts, Dashboards), Google Data Studio Programming & Querying: SQL (PostgreSQL, MySQL, SQL Server) Databases & Data Management: PostgreSQL, MySQL, MongoDB, Excel/CSV/JSON handling, Data Cleaning & ETL processes Statistical Analysis: Descriptive Statistics, Hypothesis Testing, Trend Analysis, Forecasting, Regression Soft Skills: Data Storytelling, Stakeholder Communication, Problem-Solving, Project Management, Documentation Collaboration and Version Control using Git, GitHub and GitLab Project Management: Software development life cycle, Documentation(Swagger, Class Diagrams, process flows, AGILE methodologies(SCRUM, XP), GitHub wikis, GitHub Issues WORK EXPERIENCE Data Analyst Lanthanion Solutions 06/2023 - Present, Cambridge, United Kingdom Environmental conservation Achievements/Tasks Gat

Labeling Experience

Data Annotation and Dataset Quality Specialist

TextClassification

Annotated, categorized, and validated energy and operational datasets used for reporting and machine learning initiatives. Performed quality checks, identified inconsistencies, verified data accuracy, and maintained documentation according to project guidelines. Supported preparation of high-quality datasets for analytical and AI-driven applications.

2020 - 2023

Education

Work History