Accounts Assistant

Adecco; Newbury; On-site; GBP 18,000 - 24,000; Full time

Job summary

Adecco is seeking an Accounts Assistant for a 3‑month contract in Newbury, August to October 2026, to support the finance team during a busy migration from QuickBooks to Sage200.

Responsibilities include processing AP invoices, reconciling balance sheets, and preparing Excel data for migration. Experience with Sage200 and QuickBooks is desirable; strong attention to detail and proactive communication are essential.

Qualifications

• Previous experience in an Accounts Assistant, Finance Assistant, or Bookkeeping role.
• Experience processing invoices and reconciling accounts.
• Good understanding of balance sheet reconciliations.
• Intermediate Excel skills, including data consolidation and reconciliation.
• Strong attention to detail and accurate data entry skills.
• Ability to work independently and prioritise workload effectively.
• Good communication skills and a proactive approach.

Responsibilities

• Process and maintain Accounts Payable invoices in QuickBooks and support the transition to Sage200.
• Reconcile balance sheet and other control accounts.
• Prepare and consolidate financial data using Excel for migration into Sage200.
• Assist with opening balances ahead of October go‑live.
• Support the transfer and reconciliation of finance data between systems.
• Assist with Sage200 system testing and data validation.
• Help develop and maintain finance procedures and records.
• Provide day‑to‑day support to the Finance Manager and wider finance team.
• Liaise with internal stakeholders to ensure finance information is accurate and up to date.

Skills

Excel

Attention to detail

Data entry

Communication

Independent work

Prioritisation

Tools

Sage200

QuickBooks

Job description

Accounts Assistant

3‑Month contract (August – October2026) in Newbury. Due to continued growth and an upcoming Sage200 implementation, our client needs an Accounts Assistant to support the finance team during a busy period and to aid the transition from QuickBooks to Sage200.

Key Responsibilities

• Process and maintain Accounts Payable invoices in QuickBooks and support the transition to Sage200.
• Reconcile balance sheet and other control accounts.
• Prepare and consolidate financial data using Excel for migration into Sage200.
• Assist with the preparation of opening balances ahead of the October go‑live.
• Support the transfer and reconciliation of finance data between systems.
• Assist with Sage200 system testing and data validation.
• Help develop and maintain finance procedures and records.
• Provide day‑to‑day support to the Finance Manager and wider finance team.
• Liaise with internal stakeholders to ensure finance information is accurate and up to date.

Skills & Experience Required

• Previous experience in an Accounts Assistant, Finance Assistant, or Bookkeeping role.
• Experience processing invoices and reconciling accounts.
• Good understanding of balance sheet reconciliations.
• Intermediate Excel skills, including data consolidation and reconciliation.
• Strong attention to detail and accurate data entry skills.
• Ability to work independently and prioritise workload effectively.
• Good communication skills and a proactive approach.

Desirable

• Experience using Sage200.
• Experience working with QuickBooks.
• Previous exposure to finance system migrations or data transfer projects.
• Experience supporting a busy finance team.

What's on Offer

• Immediate start.
• 3‑month contract through to October.
• Opportunity to gain exposure to a Sage200 implementation project.
• Varied role with a broad range of finance responsibilities.
• Supportive and collaborative working environment.

The Adecco Group UK & Ireland is an Equal Opportunities Employer.