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
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Teslim Adeyanju
TA
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

Built a self-directed NHS financial analytics pipeline (~2.1M records, 206 trusts) with a normalised MySQL star schema and audit-logged ETL, and published fda-toolkit, an open-source Python package now used by 1,000+ analysts monthly.

2024 — Present

Treasurer — Financial Strategy & Governance

Board Level

UK Registered Charity

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

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

2019 — 2022

Financial Data Analyst

Remote UK Collaboration

Consolidated Sage and legacy-system data into Power BI semantic models across 36 states, building 55+ dashboards and 80+ DAX measures, and identifying savings 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.

Teslim Adeyanju

MSc Finance and Investment Banking : Distinction

University of Hertfordshire, UK · 2022–2024

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

Built on the CFA Levels 1 & 2 curriculum, the programme is where the quantitative rigour behind my financial modelling and investment analysis comes from — the same discipline I now apply to Power BI, SQL, and Python-based reporting.

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

Microsoft Certifications

  • Power BI Data Analyst Associate (PL‑300) Microsoft Certified · 2026
  • Azure Data Fundamentals (DP‑900) Microsoft Certified · 2026
  • Fabric Analytics Engineer Associate (DP‑600) Microsoft · In progress, expected October 2026

Databricks Training and Credentials

  • SQL Analytics on Databricks Databricks · 2026
  • AI/BI for Data Analysts Databricks · 2026
  • Lakehouse Platform Fundamentals Databricks · 2026

Additional Certifications and Training

  • Xero Certified Advisor Xero · 2025
  • Python for Data Analysis SuperDataScience · 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
#ProjectFocusStack
02Financial Data PipelineETL · Forecasting · TradingPython
05UK Mutual Fund PerformanceFund Analysis · Performance—
06ML Financial AnalysisRegression · Classification · Ensemble ModelsPython
07NHS Waiting List AnalyticsHealthcare · Trend AnalysisPython
08Diamond Price PredictionEDA · Feature Engineering · MLPython
09Superstore Sales PredictionRetail · Forecasting · MLPython
10Retail Marketing PredictionMarketing · Consumer BehaviourPython
11Salary Prediction (SHAP)ML · Explainability · SHAPPython
12Lead Conversion ModelMarketing · ClassificationPython
13YouTube Sentiment AnalysisNLP · Sentiment · TextPython
14UK Immigration Impact AnalysisPower BI · Geographic Data · PolicyPower BI
15World University RankingEDA · Data AnalysisPython
16AI Career CoachAI Agent · LLMHTML/JS
17AI News AutomatorAI · Streamlit · AutomationPython
18Email AgentAI Agent · AutomationPython
19Ollama Local AgentLocal LLM · AIShell
21MySQL Fundamentals to AdvancedCore SQL to Analytics · Python IntegrationMySQL + Python

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

Get In Touch

Let's Build Better Analytics Together

Interested in discussing Finance Analytics, Data Engineering, Power BI implementation, or Python-based financial solutions? I'm based in the UK and available for immediate engagement.

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