A growing professional services organisation is seeking an experienced and highly organised Internal Accounts Manager / Office Manager to join their Manchester-based team. This is a dual-role position combining financial administration, credit control, and invoicing with responsibility for overseeing day-to-day office operations. The successful candidate will play a key role in supporting both operational and commercial functions, ensuring strong financial processes, accurate billing, and a well-managed, efficient office environment. Key Responsibilities Accounts & Financial Management Prepare and issue client invoices, particularly in relation to R&D tax claims Carry out benefit analysis and calculations to support ARC (Agreement/Revenue Calculations) and accurate invoicing Manage credit control processes, including chasing outstanding payments and reducing debtor days Maintain accurate financial records and support reporting activities Liaise with internal teams to ensure billing accuracy and timely invoicing Office & Operations Management Oversee the day-to-day running of the office and act as the central administrative support function Support operational and sales teams with general administration Manage office supplies, systems, and overall office organisation Ensure a professional, efficient, and well-functioning working environment Client & Internal Communication Act as a key point of contact for client invoici...