Teslim
Adeyanju, ACA

CoreInsight Financial Advisory Ltd · Hampshire, UK

Independently designs and delivers end-to-end financial data solutions, including a self-directed data migration project using a publicly available NHS dataset of ~2.1 million records across 206 trusts, and a published open-source Python package for financial data analysis.

Designed a normalised star schema MySQL database from raw, multi-format NHS source files; built a Python/Pandas ingestion layer to parse, validate, and load ~2.1M records with row-level audit logging; published fda-toolkit on PyPI — 67 production-ready functions, 1,000+ downloads; and reduced data cleaning cycle time from hours to minutes via a reusable ETL pipeline architecture.

Asylos · UK Registered Charity

Directs financial strategy, long-term planning, and resource allocation; leads annual budget cycles with scenario modelling, and prepares Power BI board dashboards for trustees.

Enhanced reserve forecasting to detect funding gaps 6 months in advance, securing £12K in operational continuity funding; delivered board-approved budgets 60 days earlier, enabling timely allocation of £120K across 8 critical projects; managed £1M in donor contributions with zero delays across 12 fund categories; and maintained 100% audit compliance with zero material findings across 2 consecutive audit cycles.

QS Dimensions · UK

Built cost models and rolling forecasts, led monthly reforecast cycles across 6 departments, and redesigned Power BI models onto star schema architecture with reusable DAX measures.

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

Misadel Ltd · Nigeria (Remote UK Collaboration)

Designed automated ETL pipelines to consolidate financial data from Sage and legacy platforms, and built optimised Power BI semantic models covering sales, procurement, and receivables across 36 states.

Built and maintained 55+ interactive Power BI dashboards across 8 business functions and a library of 80+ DAX measures for revenue, margin, and collection performance, consolidated data from 4 disparate source systems into unified Power BI semantic models, and identified cost-saving opportunities across 85 supplier contracts and 1,200+ SKUs.

CleanAce Solution Ltd · Nigeria

Led full-cycle monthly close and delivered financial statements to the Board, ran audit readiness activities with IFRS-compliant schedules, and supported capital expenditure tracking.

Achieved 100% on-time submission for 60+ board packs over 5 years (72 board meetings) with clean audit reports and zero material misstatements across 5 consecutive annual audits, completed year-end close 5 days ahead of schedule (17% faster), and supported £125K in annual savings (8.3% reduction from £1.5M baseline).

MTN Business Partner Ltd · Nigeria

Managed financial controls and reporting across 35 branches spanning 6 regional zones, and performed intercompany reconciliations across 8 business units.

Reduced month-end close from 7 days to 3 days (57% improvement), eliminated 100% of critical reconciliation errors (from 12/month to zero), produced consolidated financials on time for 36 consecutive monthly cycles with 100% accuracy, and drove 8 cost optimisation initiatives delivering ₦8M in annual savings.