Summary

Overview

Work history

Education

Skills

Timeline

Terence Mankefo

Uxbridge,United Kingdom

Summary

IT Business Analyst with 11 years of experience in finance transformation and system integration. Proven track record in delivering complex projects on time and improving operational efficiencies through innovative solutions. Skilled in managing stakeholder relationships and ensuring compliance with industry standards.

Overview

years of professional experience

years of post-secondary education

Work history

IT Business Analyst D365 F&O /SAP/SCM

Ayvens

Slough , Berkshire

2024.10 - Current

Virtualised or graphically visualised system operations to identify areas for improvement.
Ayvens was undergoing major Finance Transformation to consolidate back-office functions and improve visibility over £Multi-million Asset Register of leased vehicles.
Acted as bridge between Fleet Operations team and D365 Fixed Assets/Cost Accounting modules.
Redesigned process flow for Vehicle Disposals & Profit/Loss on Sale. Previously, this was manual, Excel-driven nightmare; I mapped integration to automate GL entries based on Value Models within D365.
Owned Financial Master Data cleansing for Vendor Accounts (AP) . Given Ayvens high volume of maintenance suppliers and dealerships, vendor master was cluttered with duplicates.
Designed Data Migration strategy and validation rules to records based on VAT number and Bank Account hash—crucial for avoiding duplicate payments post go-live.
Intercompany Complexity: Supported design for Intercompany Recharges between Ayvens UK and Central European Shared Service Centre.
Mapped chart of accounts to ensure VAT Group implications were correctly reflected in Tax Integration, non-negotiable requirement for HMRC compliance.
Mapped AS-IS AR/AP Business processes with 3rd party suppliers .
Led multiple change management workshops in order to identify gaps and improve customer journey outcome .
UAT & End-User Adoption: Ran User Acceptance Testing (UAT) cycle for Accounts Payable and Fixed Asset workstreams.
Wrote and executed test scripts for complex scenarios like Partial Disposal of Fleet Vehicle and Lease Termination Penalties. Managed RAID log for finance defects, ensuring system could correctly handle IFRS 16 Leases before sign-off.

IT Business Analyst

Leaseplan UK

Slough

2022.05 - 2024.05

Served as Finance Workstream process lead for migration from Sage to D365 F&O across 4 EMEA legal entities. Delivered Go-Live on time despite 2 months of scope creep regarding Intercompany Project Billing.
Cross-Module Integration: Resolved critical pain point where Project Accounting subledger entries were not flowing correctly to GL due to posting profile misalignment. Liaised with technical developer to correct data entity mapping without writing code, preserving functional design integrity.
UAT & Defect Management: Owned UAT cycle for entire Finance track. Wrote 85+ test scripts specifically for complex scenarios (e.g., Multi-currency PO Match, Project WIP Accrual Reversal). Maintained RAID log that reduced "Showstopper" defects from 12 to 1 prior to board approval for Go-Live.
Stakeholder Management: Managed tense relationship with Global Process Owner regarding Fixed Asset Depreciation Conventions. Successfully negotiated hybrid approach that satisfied local statutory reporting (UK GAAP) while maintaining global IFRS alignment.

Functional Consultant /D365 /SAP Implementation

Havas Media Group

London

2021.07 - 2021.11

Supported Intercompany & Project Accounting design phase which was stalling due to siloed thinking between agency finance teams and central ERP team.
Process Re-Engineering: Redesigned end-to-end flow for Media Production Costs. Introduced new financial dimension logic that separates Cost Centre from Campaign Activity, enabling real-time margin reporting that wasn't possible in legacy system.
Workshop Leadership: Facilitated 4 intensive "As-Is / To-Be" workshops with Finance Directors and Operations Leads, focusing specifically on Cost Accounting for billable staff utilization.
Data Migration Focus: Personally, audited Master Data file for Main Accounts and Financial Dimensions. Identified critical conflict in Legal Entity override structure that would have broken consolidation reporting at month-end 1—fixed it 3 weeks before UAT.

IT Business Analyst /D365 /Digital Transformation

NetValue Ltd