Senior Accounts Assistant – 3‑Month Contract (Full‑time)

About the role

We are seeking a proactive Senior Accounts Assistant to support a growing SME in Newbury during a critical finance systems migration. The role is full‑time, on‑site for a three‑month fixed‑term contract, and will work closely with the Finance Manager to ensure a smooth Sage 200 go‑live. Candidates must have their own transport to reach the office and be available to start at short notice, ideally the first week of August.

Key responsibilities

• Process and enter supplier invoices into the existing ERP system.
• Support the Accounts Payable function throughout the Sage 200 implementation.
• Consolidate and prepare financial data using Excel.
• Assist in preparing opening balances for the new system.
• Produce job and project analysis reports.
• Perform balance‑sheet and other account reconciliations.
• Participate in system testing, process improvements and documentation of finance procedures.
• Provide general support to the Finance Manager throughout the implementation project.

Required profile

• Previous experience as an Assistant Accountant, Senior Accounts Assistant or similar finance role.
• Strong Excel skills, including VLOOKUPs and Pivot Tables.
• Experience with reconciliations and high‑volume transactional finance processes.
• Ability to work accurately with large data sets.
• Experience supporting finance system implementations is advantageous.
• Available to start at short notice, ideally the first week of August.

Required skills

• Excel (advanced functions, data manipulation, VLOOKUP, Pivot Tables)
• Sage 200 (implementation experience preferred)
• ERP system usage