Doris Twumasi

I’m an entry-level Data Analyst with a B.Sc. in Demography and Social Statistics, and I bring a strong foundation in turning raw data into reliable, decision-ready insights. I’m proficient in SQL and Excel, and I’ve been building my visualization workflow by developing Tableau skills.

Through a self-directed SQL project, I designed a multi-layer data warehouse using the Bronze-Silver-Gold (medallion) architecture in SQL Server. I consolidated 6 datasets from two source systems (CRM and ERP), applied structured data cleaning and deduplication at the Silver layer, and created query-optimized Gold-layer tables to support customer, order, and sales analysis.

I focus on data integrity and clarity—removing duplicate and inconsistent records and modeling business-friendly views that make reporting dependable. My goal is to pair analytical rigor with practical, self-driven technical learning so stakeholders can trust what the numbers say.

I also bring experience using data to improve outcomes through structured teaching and performance tracking, where I analyzed assessment records to spot learning gaps and translated raw results into actionable progress summaries. That same mindset drives how I document assumptions, maintain clean transformations, and communicate findings with intent.