Billing Administrator

About Arc

Arc is a leading IT Managed Services Provider (MSP) based in the UK, delivering innovative and reliable IT solutions to businesses across various industries. With a strong reputation for excellence, we offer a range of services, including IT support, hybrid cloud solutions, cybersecurity, infrastructure management, Power Apps and AI. Our team is dedicated to delivering outstanding customer service and technical expertise to help businesses succeed.

We are looking for a highly organised and detail-oriented Billing Administrator to join Arc's Finance team. The successful candidate will be responsible for the accurate and timely preparation and processing of invoices across Arc's managed service contracts, cloud, cybersecurity and project-based billing, maintaining customer billing records, resolving billing queries, and supporting the wider finance function.

The role requires excellent attention to detail, strong administrative skills, confidence working with numbers, and the ability to manage deadlines effectively. You'll work closely with the Billing Manager and Finance team to help keep Arc's billing accurate, timely and aligned with our customer contracts.

• Prepare, process and issue customer invoices accurately and within agreed deadlines, across recurring managed service contracts and non-recurring/project billing.
• Check billing information, rates, charges and customer details for accuracy against contracts and PSA records.
• Process credit notes, adjustments and billing corrections where required.
• Maintain accurate customer and billing records within internal finance and PSA systems.
• Investigate and resolve invoice discrepancies and billing queries.
• Liaise with customers and internal departments regarding billing issues.
• Reconcile billing information and assist with payment and account queries.
• Produce regular billing reports and provide administrative support to the Finance team.
• Monitor billing schedules and ensure invoices are processed in accordance with Arc's procedures.
• Assist with month-end and year-end finance activities when required.
• Maintain confidential financial and customer information.
• Identify billing errors or process improvements and raise these with the Billing Manager.
• Undertake other finance and administrative duties as required.

• Previous experience in billing, invoicing, finance administration or a similar administrative role.
• Strong attention to detail and accuracy.
• Good numerical and analytical skills.
• Good working knowledge of Microsoft Excel and Microsoft Office.
• Excellent organisational and time-management skills.
• Ability to manage multiple tasks and meet deadlines.
• Strong written and verbal communication skills.
• Ability to investigate discrepancies and resolve problems effectively.
• Ability to work independently as well as part of a team.
• High level of professionalism and confidentiality.

• Experience using accounting, invoicing, PSA or ERP systems - e.g. Autotask, Connect Wise, Xero or Sage.
• Experience working within a finance or accounts department, ideally in an MSP, IT services or other recurring-revenue business.
• Knowledge of accounts receivable processes.
• AAT qualification or relevant finance/accounting training.
• Experience working with high-volume billing environments.

The ideal candidate will be:

• Accurate and detail-focused
• Organised and dependable
• Proactive and willing to take initiative
• Comfortable working with numbers and financial information
• Professional and customer-focused
• A good communicator
• Able to work calmly under pressure and meet deadlines

The Billing Administrator will work closely with the Billing Manager, Finance, Accounts, Sales, Service Delivery…