Teslim
Adeyanju, ACA

Hi, I'm Teslim Adeyanju. Financial Data Analyst | ACA. Power BI, Finance & Data Automation.

Financial Data Analyst for FP&A and commercial finance

Microsoft Certified Power BI Data Analyst (PL-300) and Azure Data Fundamentals (DP-900), and ACA Chartered Accountant working as a Financial Data Analyst, BI Analyst, and Finance Systems Analyst — helping organisations turn complex financial data into trusted, decision-ready insights using Power BI, Databricks, SQL, Python, and Azure.

PL‑300 Certified DP‑900 Certified Chartered Accountant Power BI SQL Python Microsoft Fabric Excel

View Finance Projects View CV Get In Touch LinkedIn GitHub

Power BI Expert

📈 Financial Analytics

Measurable impact delivered

Month-end Close: 7 days to 3 days 57% reduction through automated reconciliation, structured Power BI reporting, and streamlined close procedures
Forecast Accuracy to ±8.5% Achieved on a £2.3M budget via rolling 13-week cash flow models, variance tracking, and scenario planning
Reporting Cycle Cut by 25%, Data Prep by 80% Delivered through ETL automation, Power Query transformation pipelines, and reusable SQL extraction scripts
£50K+ Annual Cost Savings Identified through margin analysis, cost centre reviews, and process optimisation across finance operations
60% Drop in Manual Reporting Requests Enabled by self-service Power BI dashboards giving finance stakeholders direct access to live KPIs and variance reports
Board-Level Governance Treasurer at Asylos (UK Registered Charity), overseeing financial controls, budgeting, and compliance reporting to the board

Career

Experience that shaped my finance & data practice

2025 — Present

Founder & Independent Financial Data Analyst

Flagship Project

Independent Practice · Hampshire, UK

Designs and delivers end-to-end financial data solutions independently, including migrating a 2.1M-record NHS dataset into a production-grade MySQL/Python pipeline with row-level audit logging, and publishing fda-toolkit, an open-source Python package now used by 1,000+ analysts monthly.

2024 — Present

Treasurer (Voluntary Board Role)

Board Level

UK Registered Charity

Directs financial strategy and long-term planning, leading annual budget cycles with scenario modelling and preparing Power BI dashboards for trustees. Enhanced reserve forecasting to flag funding gaps six months ahead and oversees £1M+ in donor funds with a clean audit record.

2024 — 2025

Financial Reporting Analyst

Remote UK Engagement

Built cost models and rolling forecasts, led monthly reforecast cycles across six departments, and rebuilt Power BI reporting on a star-schema model with reusable DAX measures. Tightened forecast accuracy on a £2.3M budget and cut manual reporting work by 60% through self-service dashboards.

2019 — 2022

Financial Data Analyst

Remote UK Collaboration

Designed automated ETL pipelines to consolidate financial data from Sage and legacy platforms, and built 55+ Power BI dashboards with 80+ DAX measures spanning sales, procurement, and receivables across 36 states.

2013 — 2018

Financial Accountant

Led full-cycle monthly close and delivered financial statements to the Board, ran audit-readiness activities against IFRS-compliant schedules, and supported capital expenditure tracking — maintaining a clean 5-year audit record with consistent early delivery.

2010 — 2013

Financial Business Analyst

Managed financial controls and reporting across 35 branches spanning six regional zones, and performed intercompany reconciliations across eight business units. Cut month-end close from 7 days to 3 and eliminated recurring reconciliation errors.

Qualifications

Education & Certifications

Academic excellence paired with current industry certifications across finance, analytics, and cloud platforms.

MSc Finance and Investment Banking : Distinction

University of Hertfordshire, UK · 2022–2024

Top 5% of cohort · HBS Excellence Award 2024 · Student Representative

Grounded in CFA Levels 1 & 2 curriculum, the programme combined quantitative finance, investment analysis, and applied data analytics.

Also holds a Postgraduate Diploma in Finance: University of Lagos, Nigeria, 2017–2018.

Professional Qualifications

Associate Chartered Accountant (ACA)
Associate Accounting Technician (AAT) 2005

Certifications

Power BI Data Analyst Associate (PL‑300) Microsoft Certified · 2026
Azure Data Fundamentals (DP‑900) Microsoft Certified · 2026
Generative AI Fundamentals Databricks · 2026
Lakehouse Platform Fundamentals Databricks · 2026
SQL (Advanced) HackerRank · 2026
Python for Data Analysis SuperDataScience · 2025
Xero Certified Advisor Xero · 2025
Financial Statement Analysis Corporate Finance Institute · 2021

Technical Stack

Tools & Technologies

The tools I use to turn financial data into insight, and insight into decisions.

Business Intelligence: Power BI (PL-300), DAX, Power Query, Semantic Models, Star Schema

SQL & Databases: SQL, T-SQL, MySQL, Stored Procedures, ETL Pipelines, Data Modelling

Python & Data Engineering: Python, Pandas, NumPy, SQLAlchemy, PyPI Package Development

Finance Systems: Sage 50, Xero (Certified Advisor), QuickBooks, ERP Integration

Microsoft Excel (Advanced): Financial Modelling, Power Query, Pivot Tables, FORECAST.ETS

Cloud & Modern Data Platforms: Azure SQL, Databricks SQL, Azure Databricks, Git

Data Visualisation: Tableau, Dashboard Design, Interactive Reporting

AI & Automation: Azure OpenAI, Prompt Engineering, Retrieval Augmented Generation (RAG), Claude API

Portfolio

Selected Projects

View all 23 projects on GitHub 23 repos

Finance-focused case studies spanning classical analytics, Power BI, and modern AI.

★ FDA PyPI Package

PyPI

FDA Toolkit — Financial Data Preparation Framework

67 functions · 8 modules · reusable financial-data workflow

Python framework for automating financial data cleaning, validation, transformation, and audit logging. Eliminates manual reconciliation, broken schemas, and audit gaps—so analysts focus on insight, not data repair.

Python PyPI ETL Audit

PyPI ↗ GitHub ↗

01 GitHub

NHS Financial Analytics

206 NHS trusts across 3 financial years · Python-to-MySQL ETL pipeline

Engineered end-to-end Python ETL pipeline ingesting NHS England financial data into MySQL star schema with analytical views, KPI metrics, and Power BI integration across 206 trusts.

Python MySQL Power BI NHS Finance

02 GitHub

Financial Forecasting & Variance Analysis

Management Accounting · Forecasting · Variance Analysis

Designed forecasting models and variance analysis framework using Python — translating core management accounting skills into data-driven analytics with professional visualisations.

Python Pandas Variance Analysis

03 GitHub

Stock Market Risk Analysis

GOOGL · AMZN · AAPL · MSFT · Monte Carlo Simulation

Full portfolio risk analysis framework: daily returns, volatility computation, Sharpe ratio calculation, and 30-year Monte Carlo simulation for informed investment risk modelling.

Python Monte Carlo Risk Analysis

04 GitHub

Advanced SQL Analytics

CTEs · Window Functions · Data Quality Analysis

Advanced SQL analytics using CTEs, window functions, aggregations, and data quality frameworks — applied to student wellbeing analytics in Jupyter and MySQL.

SQL Python Window Functions

05 GitHub

Financial Performance Analytics Model

29 DAX Measures · 5 KPI Domains · Enterprise Dashboard

Advanced Power BI model with 29 complex DAX measures tracking profitability, growth, efficiency, pricing, and risk metrics. Interactive dashboards with drill-through capabilities for business intelligence.

Power BI DAX Analytics

06 GitHub

Financial Report Intelligence System

10-agent architecture · 21+ financial metrics · validated on Apple, Amazon & Colgate annual reports

Multi-agent AI platform that extracts and interprets financial statements — automated metrics and ratio calculation, evidence-linked risk and anomaly detection, and AI-generated executive commentary, with Python handling every calculation so results stay auditable.

Python Multi-Agent AI Power BI

07 GitHub

HMRC Tax RAG Assistant

1,299 indexed sections · 5 HMRC internal manuals · source-linked answers

Retrieval-augmented Q&A system that grounds UK tax answers in official HMRC internal manuals instead of an LLM's memory — every response traces back to the exact GOV.UK source page, or the system declines to answer.

Python RAG Tax

View all 17 remaining projects

#	Project	Focus	Stack
02	Financial Data Pipeline	ETL · Forecasting · Trading	Python	↗
05	UK Mutual Fund Performance	Fund Analysis · Performance	—	↗
06	ML Financial Analysis	Regression · Classification · Ensemble Models	Python	↗
07	NHS Waiting List Analytics	Healthcare · Trend Analysis	Python	↗
08	Diamond Price Prediction	EDA · Feature Engineering · ML	Python	↗
09	Superstore Sales Prediction	Retail · Forecasting · ML	Python	↗
10	Retail Marketing Prediction	Marketing · Consumer Behaviour	Python	↗
11	Salary Prediction (SHAP)	ML · Explainability · SHAP	Python	↗
12	Lead Conversion Model	Marketing · Classification	Python	↗
13	YouTube Sentiment Analysis	NLP · Sentiment · Text	Python	↗
14	UK Immigration Impact Analysis	Power BI · Geographic Data · Policy	Power BI	↗
15	World University Ranking	EDA · Data Analysis	Python	↗
16	AI Career Coach	AI Agent · LLM	HTML/JS	↗
17	AI News Automator	AI · Streamlit · Automation	Python	↗
18	Email Agent	AI Agent · Automation	Python	↗
19	Ollama Local Agent	Local LLM · AI	Shell	↗
21	MySQL Fundamentals to Advanced	Core SQL to Analytics · Python Integration	MySQL + Python	↗

Some links go to my second GitHub account, github.com/UthmanAdeyanju (Uthman is my other given name).

TeslimAdeyanju, ACA