Accounts Assistant
Location - Windsor, UK
Type of Work - Office Based
Role Overview
Reporting into the Senior Controller, the Accounts Assistant position at InterSystems plays an integral role in the Finance department at our UK office in Windsor, Berkshire. The UK office supports operations across EMEA.
Key Responsibilities
- Accounts Payable processing for UK, Ireland and South African branches including verification of appropriate approval; invoice posting, upload of supporting documentation & preparation of weekly settlement runs
- Finance review of staff expenses against local branch policies for UK, Ireland and South Africa; processing expense settlements weekly
- Deliver expense induction for new starters
- Process daily bank transactions and complete daily bank account reconciliations
- Collation, communication & co-ordination of payroll changes (provided by HR) to bureaus for South African, Finland and Swedish branches. Review of outputs to confirm appropriate deductions. Processing payroll settlement and payroll journals to ledger (Monthly)
- South African VAT return preparation (Monthly)
- Month end balance sheet reconciliation for UK, Ireland and South African branches
- Preparation of corporate card ledger posting and upload of supporting documentation into Workday (Monthly)
- Ensure finance activities comply with local statutory requirements and internal control frameworks across supported regions
- Bank settlement of VAT and Corporation Tax payments as required
- Prepare ad-hoc journals as required
- Assist in the month-end close process
- Ad-hoc assistance to the Senior Controller and International Controller as required
Key Accountabilities
- Ensure supplier and employee expense accounts are accurately processed, reconciled, and settled in line with agreed terms, local policies, and internal controls
- Record and validate invoices, including matching against approved purchase orders
- Support payroll coordination activities for selected regional branches
Experience/Qualification Required
- AAT Level 4 qualification (minimum) or equivalent; experience within an international, multi-entity environment is preferred.
- Prior experience using Workday is highly advantageous.
- Experience working with multi-currency accounting systems is desirable.
- Strong attention to detail with a proactive and collaborative team-oriented approach.
- Significant experience in transactional finance activities, with a solid understanding of financial statements and accounting entries.
- Confident communicator, able to liaise effectively with internal teams, senior management, and external stakeholders to resolve queries and explain financial information clearly
About InterSystems
InterSystems, a creative data technology provider, delivers a unified foundation for next-generation applications for healthcare, finance, manufacturing, and supply chain customers in more than 80 countries. Our data platforms solve interoperability, speed, and scalability problems for large organizations around the globe to unlock the power of data and allow people to perceive data in imaginative ways. Established in 1978, InterSystems is committed to excellence through its 24×7 support for customers and partners around the world. Privately held and headquartered in Boston, Massachusetts, InterSystems has 38 offices in 28 countries worldwide. For more information, please visit InterSystems.com.
What We Do
InterSystems builds the software that makes complex systems work—reliably, securely, and at scale. For more than 45 years, we’ve been the information engine behind some of the world’s most mission-critical applications in healthcare, government, and business. Our data management, integration, and analytics technologies help organizations connect disparate systems, turn data into insight, and deliver better outcomes. From enabling interoperable healthcare and advancing clinical care, to powering national infrastructure and large-scale enterprise systems, our technology is used every day by millions of people in more than 80 countries. What sets InterSystems apart is not just what we build, but how we build it. We focus on long-term innovation, deep engineering excellence, and solving hard problems that truly matter. Our teams work closely with customers to tackle real-world challenges—often behind the scenes, but always at the heart of what keeps essential systems running. If you’re motivated by meaningful work, technical depth, and the opportunity to have a global impact, you’ll find it here.
Why Work With Us
Because we are a profitable, privately-held software company, we place our clients first in everything we do. You’ll work on meaningful, complex problems alongside deeply curious experts in a culture that values learning, ownership, and long-term growth—without the pressure of quarterly Wall Street demands.
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InterSystems Teams
InterSystems Offices
OnSite Workspace
InterSystems prioritizes in-person collaboration with majority on-site presence and some work from home flexibility that varies by region and office location.




















