By Business CNCT
Sarah Sullivan has joined RSM UK as a tax director, strengthening the firm’s private client services team as it continues to expand its offering. She will specialise in transaction tax and private business advisory.
Helen Relf, head of private client services at RSM UK, welcomed Sullivan to the firm, highlighting her expertise in shareholder transactions and private business advisory. She said Sullivan’s collaborative approach and professional experience align closely with RSM’s values and culture, making her a valuable addition to the growing team.
RSM UK provides audit, tax and consulting services to the UK middle market, employing 5,300 partners and staff across 29 locations. In the financial year ending March 2025, the firm reported revenues of £573 million. It is also part of RSM International, a global network of independent assurance, tax and consulting firms operating across 120 countries, with more than 56,000 professionals in over 500 offices.
Based in Birmingham, Sullivan has more than 10 years of experience in tax advisory, working with entrepreneurs, high-net-worth individuals, owner-managed businesses and private equity-backed companies. At RSM, she will help develop the firm’s private client services across the Midlands and nationally, drawing on her experience in shareholder transactions and business advisory to support clients throughout the business lifecycle.
She joins RSM from Azets, where she served as a tax director and played a key role in developing the firm’s specialist owner-managed business team. Before that, she spent five years in KPMG’s private client team.
Commenting on her appointment, Sullivan said she was delighted to join RSM’s expanding tax team. She looks forward to using her expertise in shareholder transactions to help clients navigate complex tax matters and support a wide range of projects. She also aims to work closely with colleagues to strengthen the firm’s private client services and deliver comprehensive support to businesses and individuals.


