Teslim
Adeyanju, ACA

Hi, I'm Teslim Adeyanju. ACA Chartered Accountant | Financial Data Analyst. I speak both CFO and GitHub fluently. Power BI · SQL · Python · FP&A.

Financial Data Analyst for FP&A, Reporting, and Commercial Finance

ACA and Microsoft Certified Power BI Data Analyst (PL-300) helping finance teams turn messy GL, sub-ledger, and operational data into decision-ready reports, driver-based forecasts, and self-service Power BI dashboards — using 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 → 3 Days (57% Reduction) Via automated reconciliation and Power BI reporting
Forecast Accuracy to ±8.5% On a £2.3M budget via rolling 13-week cash flow models and scenario planning
Reporting Cycle Cut 25%, Data Prep 80% Through ETL automation and reusable SQL extraction scripts
£50K+ Annual Cost Savings Via margin analysis, cost centre reviews, and process optimisation
60% Drop in Manual Reporting Requests By enabling self-service Power BI dashboards for finance stakeholders

Career

Experience that shaped my finance & data practice

2025 — Present

Founder & Independent Financial Data Analyst

Flagship Project

Independent Practice · Hampshire, UK

Develops independent finance-data solutions and portfolio projects using Python, SQL, MySQL, Power BI, and modern data platforms.

Built a self-directed NHS financial analytics project using publicly available data — a normalised MySQL star schema and Python/Pandas ETL pipeline for ~2.1M records across 206 trusts with row-level audit logging — and published fda-toolkit, an open-source Python package with 67 reusable financial-data functions now used by 1,000+ analysts monthly.

2024 — Present

Treasurer (Voluntary Board Role)

Board Level

UK Registered Charity

Leads financial strategy, budgeting, reserve planning, controls, and trustee reporting, building scenario models and Power BI dashboards for board decisions.

Improved reserve forecasting to flag funding gaps six months ahead, secured £12K in operational-continuity funding, enabled £120K allocation across 8 projects through earlier budget approval, 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 redesigned Power BI reporting on a star-schema model with reusable DAX measures.

Improved forecast accuracy from ±10% to ±8.5% on a £2.3M budget, cut Power BI load times by 35% by removing 120 redundant columns, reduced manual reporting requests by 60% through self-service dashboards, and identified £50K in annual cost savings.

2019 — 2022

Financial Data Analyst

Remote UK Collaboration

Developed ETL pipelines to consolidate Sage and legacy-system data into Power BI semantic models for sales, procurement, and receivables reporting across 36 states.

Built 55+ Power BI dashboards and 80+ DAX measures, and identified savings opportunities across 85 supplier contracts and 1,200+ SKUs.

Earlier Finance Experience

2013 — 2018

Financial Accountant

Led month-end close, IFRS-compliant financial statements, and board reporting; ran audit-readiness activities and supported capital expenditure tracking. Delivered 60+ board packs on time with a clean 5-year audit record and consistent early delivery.

2010 — 2013

Financial Business Analyst

Managed financial controls, reporting, and intercompany reconciliations across 35 branches, six regional zones, and 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

Formalised through certification in 2025–2026, building on skills already applied in client and project work from 2024 onward.

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
AI/BI for Data Analysts Databricks · 2026
SQL (Advanced) HackerRank · 2026
Python for Data Analysis SuperDataScience · 2025
Xero Certified Advisor Xero · 2025
Financial Statement Analysis Corporate Finance Institute · 2025

Technical Stack

Tools & Technologies

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

Core

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

SQL & Databases

T-SQL, MySQL, Stored Procedures, ETL, Data Modelling

Python & Data Engineering

Python, Pandas, NumPy, SQLAlchemy, PyPI Package Development

Finance Systems

Sage 50, Xero (Certified Advisor), QuickBooks, ERP Integrations

Cloud & Platforms

Azure SQL, Azure Databricks, Databricks SQL, Git

AI & Automation

Azure OpenAI, 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