Get Ready to Explore with Teslim Adeyanju

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Welcome to my professional portfolio. My name is Teslim Uthman Adeyanju, and I am a finance and data science specialist with over a decade of experience in financial reporting, business intelligence, and data-driven financial analysis. I bring together deep financial knowledge and modern data tools to support smarter business decisions and more efficient financial operations.

I specialize in using SQL, Excel, Python, Power BI, and Xero to manage, process, and analyze financial data. I combine these tools with strong accounting principles and statistical methods to develop forecasts, automate reports, and uncover insights that help businesses grow and stay financially healthy.

At QS Dimensions Ltd in the UK, where I most recently worked, I served as a Business Accountant and Business Intelligence Specialist. I automated financial reports using SQL and Power BI, cutting manual work by 30% and reducing month-end close time by 20%. 

I also handled payroll and VAT processing with Sage 50 and Xero, ensuring accurate HMRC compliance. Using Python and machine learning, I built forecasting models with 95% accuracy that supported better cash flow and resource planning.

At Misadel Ventures in Nigeria, I designed machine learning models that predicted revenue and identified risks. I also created real-time dashboards and automated financial workflows with SQL and Python, reducing errors by 30% and boosting profitability. My approach focused on integrating financial analysis with automation to support executive decision-making.

At CleanAce Solution Ltd, I improved budgeting accuracy using predictive models and conducted detailed variance analysis. My work reduced operational expenses by 15% and helped improve the financial planning process. I also managed large datasets, developed custom dashboards, and maintained compliance with IFRS.

At Gibson MTN Business Ltd, I oversaw financial operations across 35 branches and introduced SQL-based reporting systems that increased profitability and reduced financial discrepancies.

I recently completed my MSc in Finance and Investment Banking at the University of Hertfordshire in the UK, where I graduated with Distinction and ranked in the top 5% of my cohort. My studies focused heavily on financial data analysis, quantitative modeling, and financial markets. The MSc program strengthened my ability to conduct deep financial analysis using modern tools and supported my research on mutual fund performance in the UK market.

Earlier, I earned a Postgraduate Diploma in Finance and Account from the University of Lagos, where I graduated with a Second Class Upper. I hold a BSc in Industrial Relations and Personnel Management from Lagos State University, where I built foundational skills in managing people, processes, and financial systems.

I am a qualified Associate Chartered Accountant (ACA) and Associate Accounting Technician (AAT). I’m currently completing the final stages of my ACCA certification in the UK, with two papers remaining. These certifications reflect my commitment to professional standards and regulatory compliance.

My technical and analytical skills include:

• SQL for querying, automating, and cleaning financial data
• Python for financial modeling, machine learning, and predictive analysis
• Power BI for visualizing KPIs and tracking performance in real time
• Excel for advanced financial modeling, forecasting, and scenario analysis
• Xero and Sage 50 for accounting, payroll, and tax processing
• Machine learning for revenue forecasting, risk modeling, and cost optimization
• Financial forecasting using time series and Monte Carlo simulations
• Big data analytics with Pandas, PySpark, and SQL on large datasets
• Cloud tools (AWS, Azure, Google Cloud) for scalable data processing

These tools allow me to work across the entire financial analytics pipeline—from data extraction to insights, automation, and presentation.

At QS Dimensions Ltd, I built SQL-based reports and dashboards that enabled leadership to make faster, more accurate decisions. My machine learning models for cash flow and revenue forecasting helped reduce financial risk and improve planning. I also optimized payroll and VAT processes using Xero and Sage 50.

At Misadel Ventures, I led a full overhaul of the financial reporting infrastructure, integrated machine learning models for forecasting, and introduced automation pipelines that saved time and improved accuracy.

At CleanAce Solution Ltd, I implemented cost optimization strategies and built financial analysis frameworks that helped reduce overheads. I used Python and Power BI to build tools that enhanced strategic planning.

At Gibson MTN Business Ltd, I standardized financial reporting procedures across 35 branches using SQL, which helped identify inefficiencies and increase branch profitability.

Alongside technical skills, I bring strong communication and leadership capabilities. I’ve worked with stakeholders across finance, operations, and executive teams. My strength lies in turning complex data into clear business insights that non-technical stakeholders can act on. I’ve led process improvement projects, mentored colleagues, and coordinated cross-departmental reporting initiatives.

My additional roles in the UK as a cover supervisor and cleaning specialist have strengthened my time management, adaptability, and attention to detail—skills I apply directly in finance to ensure accuracy, efficiency, and consistent performance.

I’m looking for opportunities where I can continue to combine finance with analytics and technology. I want to work in roles that involve financial data analysis, forecasting, and automation, using tools like SQL, Python, Power BI, and Xero to improve reporting accuracy and drive strategic insights.

I’m passionate about continuous improvement, reducing manual workloads, and using data to improve financial outcomes. If you're looking for a finance and data professional who can support smarter business decisions, improve performance, and strengthen your reporting infrastructure, I’d love to connect.

Thank you for taking the time to learn more about me.