We are a well-established building services contractor specialising in mechanical, public health (MandE), maintenance, and specialist installation projects across the UK. Due to continued growth and the implementation of our new COINS construction ERP system, we are looking for an experienced Management Accountant to join our finance team at our Head Office in Cheam, Surrey. This is a fantastic opportunity for a commercially aware Management Accountant with construction or building services experience to play a key role in a major system transition while delivering high-quality financial insight to senior stakeholders. Key Responsibilities: Prepare accurate and timely monthly management accounts, including PandL, balance sheet, and cashflow statements for the business and individual contracts. Deliver insightful financial analysis, variance reporting, and commercial commentary to support the Senior Management Team and Finance Director. Manage project costing, WIP analysis, contract profitability, and job cost reporting across mechanical, public health, and specialist installation projects. Lead cost control, budgeting, forecasting, and periodic reforecasts, ensuring alignment with project budgets and company objectives. Own month-end and year-end processes, including accruals, prepayments, journals, and balance sheet reconciliations. Play a central role in the implementation and adoption of COINS ERP including data migration, process improvements, system training for finance