AccountingForce is a specialist finance transformation and strategic advisory practice. Every engagement is personally led by Mahmoud Warriah BSc FCA.
AccountingForce, operated through Linden Business Development Ltd, partners with PE-backed, AIM-listed, and growth-stage businesses to drive operational efficiency, implement enterprise-grade financial systems, and deliver measurable value through hands-on CFO leadership.
With 25+ years of experience spanning blue-chip corporates — BT, Centrica, Hewlett-Packard, Thames Water — and high-growth SMEs, we bring the rigour of institutional finance to the agility of entrepreneurial businesses.
We don't just advise. We embed within your team to implement, build capability, and transfer knowledge — so the improvements we deliver endure long after our engagement ends.
Founder & Managing Director
As CFO of Sorted Group Holdings plc, Mahmoud led the company's AIM listing — opening the London Stock Exchange in February 2024 — overhauled the finance function, reduced operational costs by 70%, and refocused the business following the divestment of the Clicksit unit. Major enterprise clients including M&S, Dyson, ASOS, and Boohoo were retained and expanded under his leadership.
As CFO of the Gina Group, he implemented Dataflow ERP across finance, stock, and purchasing, launched the Shopify Plus e-commerce platform (delivering 1,200% growth in online sales), negotiated an £80M franchise agreement, and supported expansion into North America, Europe, and China.
Prior to these roles, Mahmoud led finance transformation programmes at Centrica/Bord Gais (SAP S/4HANA), managed a €350M outsourcing contract at Telefonica O2 through HP, and scoped an £85M CRM programme at Thames Water.
He now works with investors, founders, and boards to rapidly professionalise finance functions, build cash visibility, and enable transactions — whether that's preparing for exit, integrating an acquisition, or building a finance team that can keep pace with a growing business.
"Precision in reporting builds trust. Your financials should be a clear reflection of the company's health."
Led AIM listing, 70% cost reduction, enterprise client retention (M&S, Dyson, ASOS, Boohoo). Raised £2M+£3M.
ERP implementation, Shopify Plus launch (1,200% online growth), £80M franchise agreement, international expansion.
Led SAP HANA S/4 implementation. Built Power BI and Sway-based reporting. Managed offshoring to India and Poland.
Managed €350M DHL outsourcing contract. Built finance operations across 16 offices. Led 100+ staff. Delivered £20M annual savings.
Qualified as FCA at Grant Thornton. Progressed through increasingly complex finance transformation and advisory roles at major corporates.
Vendor-agnostic expertise across the full enterprise technology landscape.
SAP S/4HANA, Oracle Financials, NetSuite, Dynamics AX/NAV/365, Dataflow, Sage, Xero, QuickBooks, Agresso, Aptos
Hyperion (HFM, Essbase), Power BI, QlikView, Tableau, Salesforce, Sway
Shopify Plus, Magento, Salesforce, Dynamics CRM, ServiceNow, Jira
PRINCE2, Agile/Scrum, Six Sigma, ITIL