Jeremiah Onyema
@jeremiahonyema
Data Analyst Officer turning raw data into actionable business intelligence with SQL, Excel, and Power BI.
NigeriaWhat I'm looking for
I’m a detail-oriented, results-driven Data Analyst with over 2 years of experience transforming raw data into actionable business intelligence.
In my recent role, I designed and maintained interactive Power BI dashboards that helped reduce weekly reporting preparation time by 30% for executive leadership.
I execute complex SQL queries to extract, clean, and transform multi-table datasets exceeding 100,000+ records, improving data accuracy across core internal reports. I also conduct exploratory data analysis on customer engagement and transaction metrics to uncover revenue trends that inform targeted marketing campaigns.
I collaborate with cross-functional operational teams to identify workflow bottlenecks and deliver data-driven solutions that improve process efficiency—backed by hands-on project work like a Business Performance & Revenue Dashboard and Customer Churn & Behavioral Analysis. I hold a B.Sc. in Physics (University Of Port Harcourt, Rivers State, Nigeria) and certifications including Power BI Data Analyst Associate and SQL for Data Science.
Experience
Work history, roles, and key accomplishments
Data Analyst / Data Analyst Officer
Rivers State
Designed and maintained interactive Power BI dashboards to track KPIs, reducing weekly reporting preparation time by 30% for executive leadership. Used SQL to extract and transform multi-table datasets (100,000+ records), performed EDA to identify revenue trends, and collaborated with operational teams to address workflow bottlenecks.
Education
Degrees, certifications, and relevant coursework
University of Port Harcourt
Bachelor of Science (B.Sc.), Physics
Earned a Bachelor of Science (B.Sc.) in Physics from the University of Port Harcourt in Rivers State, Nigeria.
Microsoft
Microsoft Certified: Power BI Data Analyst Associate, Power BI
Completed the Microsoft Certified: Power BI Data Analyst Associate certification.
SQL for Data Science Certification
SQL for Data Science Certification, Data Science (SQL)
Completed the SQL for Data Science certification.
Data Analysis Intensive Training / Bootcamp
Data Analysis Intensive Training / Bootcamp, Data Analysis
Completed an intensive training/data analysis bootcamp (year not specified; noted as 2024 in the input).
Tech stack
Software and tools used professionally
Availability
Location
NigeriaAuthorized to work in
Job categories
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