Bosun Thomas Olowu
London
Summary
Data professional with over 5 years of experience in transforming complex datasets into actionable insights. Proficient in SQL for data manipulation and Power BI for data visualization and dashboard development. Demonstrated success in enhancing business outcomes through KPI development, data cleaning, and stakeholder reporting. Strong analytical skills and expertise in statistical software drive improved data reporting systems and informed decision-making.
Overview
14
14
years of professional experience
Work history
Data Analyst
Digital Echoes
London, UK
2022.11 - 2026.03
- Developed SQL queries in MS SQL Server for weekly extraction and transformation of large datasets, ensuring accurate reporting.
- Designed interactive Power BI dashboards to deliver real-time visibility into customer acquisition campaign performance.
- Analysed patterns in large volumes of data, and provided key business insights.
- Built Tableau dashboards to visualise analysis and growth patterns, enhancing executive insight into revenue trends.
- Streamlined data processing with automation techniques.
- Automated recurring Excel reports using Power Query and Pivot Tables, reducing reporting time by 40%.
- Leveraged Python programming skills to automate routine tasks, boosted productivity levels significantly reducing data inconsistencies by 30%.
- Presented analytic findings in clear manner during team meetings, fostered informed decision making within organisation.
- Created interactive dashboards using Power BI for easy data interpretation and presentation.
- Applied mathematical principles, models and techniques to diverse sectors.
- Collaborated cross-functionally to meet project deadlines, delivered consistent results.
- Mitigated risks by identifying and resolving data discrepancies rapidly.
- Optimised data systems efficiency through regular system audits and updates.
- Leveraged Python programming skills to automate routine tasks, boosted productivity levels significantly.
- Collected and analysed complex datasets for business strategy enhancement.
- Generated comprehensive reports using Tableau to visualise complex concepts easily.
- Translated complex findings into understandable documents, increased company-wide understanding of critical metrics.
- Utilised SQL to extract relevant information for reporting purposes.
- Executed regular maintenance on databases, enhanced overall system performance.
- Developed predictive models to forecast future business trends accurately.
- Enhanced business operations by developing custom data models.
- Presented analytic findings in clear manner during team meetings, fostered informed decision making within organisation.
- Improved data quality by implementing structured validation checks.
Data Analyst
LSIT Consulting
London, Netherlands
2015.01 - 2022.10
- Delivered daily and monthly KPI reporting by querying large transactional datasets using MySQL and sometimes Microsoft SQL database, ensuring leadership had timely insight into operational performance.
- Improved branch-level decision-making by building Excel dashboards with Pivot Tables and Power Query, enabling managers to monitor performance trends and identify variances effectively.
- Enhanced data integrity by implementing validation checks and cleansing processes, reducing errors and inconsistencies across reporting datasets.
- Transformed raw operational data into structured, analysis-ready datasets, improving reporting efficiency and enabling more accurate performance tracking by 25%.
- Created interactive dashboards using Power BI for easy data interpretation and presentation.
- Examined data patterns to extract valuable insights for decision-making.
- Developed custom data models to optimise business operations and improve efficiency.
- Conducted statistical analysis on varied datasets to gain insights into market trends.
- Contributed to documentation, testing, and implementation activities during major system transition, ensuring smooth adoption and minimising disruption to reporting workflows.
Junior data analyst
Zenith Bank Plc
Abuja, Nigeria
2012.01 - 2014.12
- Created SQL tables and views to establish foundational elements of internal reporting systems.
- Strengthened data reliability by assisting with testing and validation of database outputs, identifying inconsistencies and ensuring accuracy before reports were released.
- Participated in requirements-gathering and data-mapping sessions to clarify data flows and align reporting outputs with business needs.
- Documented reporting processes and assisted in enhancements to improve workflow clarity across departments.
- Entered information into data storage and data retrieval systems for processing.
- Extracted, interpreted and analysed data to drive strategic business decisions.
- Enhanced data accuracy by conducting thorough data cleansing and validation processes.
Education
BCS - IT
British Computer Society
UK 2001.04 -
Software Testing - IT
ISEB/ISTQB
UK 2001.04 -
MSc - Information Systems Management
SMU
USA 2001.04 -
BSc - Accountancy
University of Ado-Ekiti
Nigeria 2001.04 -
OND - Accountancy
Polytechnic of Ibadan
Nigeria 2001.04 -
Skills
- Database management: MS SQL Server, MySQL
- Query languages: SQL (select, join, group by, sub queries, aggregations, views)
- Data visualization: Power BI, Tableau
- Reporting tools: SSRS (Report Builder)
- Microsoft tools: Excel (Power Query, Pivot Tables, advanced formulas), PowerPoint
- Methodologies: Data validation, KPI tracking, Agile support
- Dashboard development: Power BI & Tableau
- Stakeholder reporting and data storytelling
KEY PROJECTS:
Business Performance Dashboard (Power BI), Consolidated sales and operational data into a real-time executive dashboard., Reduced reporting cycle from 5 days to real-time visibility., Enabled a 12% performance improvement through data-driven allocation decisions., Automated Reporting Framework (Excel + SQL), Integrated SQL outputs into Power Query pipelines., Reduced manual reporting effort by 50%., Improved reporting accuracy and consistency across departments.
References
References available upon request.
Timeline
Data Analyst
Digital Echoes
2022.11 - 2026.03
Data Analyst
LSIT Consulting
2015.01 - 2022.10
Junior data analyst
Zenith Bank Plc
2012.01 - 2014.12
BCS - IT
British Computer Society
2001.04 -
Software Testing - IT
ISEB/ISTQB
2001.04 -
MSc - Information Systems Management
SMU
2001.04 -
BSc - Accountancy
University of Ado-Ekiti
2001.04 -
OND - Accountancy
Polytechnic of Ibadan
2001.04 -