We are supporting a Chesterfield-based business that requires an experienced Credit Controller to support a critical ledger stabilisation project following a recent ERP system transition. This role is not a standard credit control position - it requires someone with strong end-to-end credit control experience, capable of working through complex reconciliations and data clean-up activity at pace. Key responsibilities: Full reconciliation of customer accounts across dual systems Investigation and correction of misallocations (including cross-account and invoice-level discrepancies) Cleansing and stabilisation of a high-volume ledger (~4,500 live accounts) Resolving historic issues caused by system workarounds Supporting the transition to a clean, accurate and reliable ledger position Candidate profile: Proven experience in end-to-end credit control Strong reconciliation skills - comfortable handling complex, messy ledgers Experience working through ERP/system transitions or data issues highly advantageous Methodical, resilient and able to work through high volumes with accuracy Comfortable operating in a fast-paced, problem-solving environment Additional information: Initial 3-month assignment with strong likelihood of extension Extension likely to be on a rolling basis (weekly/monthly) depending on progress Immediate impact role with a clear objective - ideal for a contractor who enjoys problem-solving and adding value quickly