Accounts Payable Assistant; Freelance

Burson, part of WPP, is the global communications leader built to create value for clients through reputation. With highly specialized teams, industry-leading technologies and breakthrough creative, we help brands and businesses redefine reputation as a competitive advantage so they can lead today and into the future. When you work at Burson, you are part of a global community of lifelong learners who thrive at the edge of innovation.

WPP (LSE/NYSE: WPP) is the trusted growth partner for the world s leading brands. We unite cutting-edge media intelligence and data solutions, world-class creativity, next-generation production, transformative enterprise solutions and expert strategic counsel in a single company - powered by exceptional talent and our agentic marketing platform, WPP Open, to help our clients navigate change, capture opportunity and deliver transformational growth.

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Burson, a global communications leader within the WPP network, is seeking an enthusiastic, confident, and detail-oriented Accounts Payable Assistant for a 6-month fixed-term contract, based in London, UK. Joining our dynamic Finance team, this role is key to ensuring smooth day-to-day financial operations, maintaining robust vendor relationships, and supporting key accounting workflows across the agency. Working closely with internal stakeholders and the broader Finance team, you will bring bags of initiative, strong organizational skills, and a flexible, collaborative approach to work.

This position combines routine transaction management with continuous process improvement, providing an excellent foundation for someone looking to build a rewarding career in finance.

• Lead the end-to-end new supplier onboarding process, ensuring all documentation and vetting procedures are accurately completed.
• Manage and resolve internal and external supplier enquiries in a timely, professional manner.
• Execute manual payment processes efficiently and accurately in line with agency financial schedules.
• Maintain strict adherence to SOX (Sarbanes-Oxley) compliance standards and internal accounting controls.
• Collaborate with the Finance team to identify and implement continuous improvements across Accounts Payable and financial workflows.
• Perform regular supplier statement reconciliations to ensure ledger accuracy and resolve outstanding queries.
• Assist with invoice processing, purchase order matching, and routine month-end financial tasks.
• Deliver ad-hoc financial administration support and assist with special finance team projects as required.

• Demonstrated interest in accounting and finance, with a drive to pursue a career within a fast-paced agency environment.
• Exceptional attention to detail with a high standard of accuracy when handling numerical data and administrative duties.
• Strong organizational skills, with the proven ability to prioritize tasks effectively and meet tight deadlines.
• Proficiency in Microsoft Excel and good comfort level working with financial spreadsheets and data.
• Strong communication and interpersonal skills, with the confidence to interface professionally with internal teams and external suppliers.
• Proactive mindset with a strong sense of ownership and the ability to follow through on tasks from start to finish.
• Collaborative team player who brings enthusiasm, adaptability, and initiative to day-to-day work.
• Prior exposure to accounts payable processing, basic bookkeeping, or financial software systems is an advantage.

Our vision is for Burson to be the leading 'academy company' for creative communications…