HaysMac, the award-winning firm of chartered accountants and tax advisors, is proud to announce the promotion of David Bareham, Mike Crowson, Sabina Burke and Tom Stock to Partner effective 1 October 2025. These appointments reflect HaysMac’s commitment to investing in leadership from within as it embarks on its next phase of growth.
David, Mike, Sabina and Tom have each made significant contributions across key practice areas and sectors, bringing together technical excellence, a focus on client relationships and strong leadership.
David Bareham is widely recognised for his deep expertise in share schemes and employee incentives. He has worked with a range of businesses spanning ambitious start-ups to long-established organisations where he designs, implements and manages incentive arrangements that support growth, retention and motivation. His ability to simplify complex technical issues has made him a trusted specialist.
On becoming Partner, David said: “This promotion reflects the incredible support and encouragement I’ve received from colleagues and clients since joining HaysMac. Share schemes and incentives are a powerful tool for helping businesses grow and retain their people, and it’s an area I’m deeply passionate about. As Partner, I’m excited to continue strengthening our expertise in this field, while also mentoring the next generation of advisers so that we can deliver outstanding, specialist service for years to come.”
Mike Crowson trained at a Big Four firm and has developed a strong reputation in audit, advising a diverse portfolio of private equity-backed and listed companies, especially in technology and life sciences. His pragmatic, clear advice has supported businesses through growth and complex financial reporting.
Commenting on his promotion, Mike said: “It’s an honour to step up as Partner at HaysMac. Having worked closely with PE-backed and listed clients across fast-moving sectors such as technology and life sciences, I’ve seen first-hand the challenges and opportunities that rapid growth can bring. I’m excited to deepen our service offering and continue building trusted, long-term relationships, helping clients move confidently through the next stage of their journey.”
Sabina Burke, Co-Head of HaysMac’s Creative, Media & Technology sector, has bolstered one of the firm’s fastest-growing sectors through her technical excellence. With over 20 years of tax experience, she has guided some of the UK’s most innovative and ambitious firms, helping establish HaysMac as a trusted adviser for forward-thinking, high-growth businesses.
Looking ahead to her new role, Sabina said: “I’m delighted to step into this new role as Partner. Leading our largest corporate sector has been one of the most rewarding parts of my career, not just because of the exciting clients we work with but also because of the brilliant team I work alongside every day. This promotion represents an opportunity to build on that momentum, to keep developing best-in-class, sector-specific advice, and to strengthen HaysMac’s role as a true partner to scale-up and fast growth businesses.”
Tom Stock has played a central role in HaysMac’s Audit & Assurance practice, where he leads the practice’s Audit Technical Team and advises on major audits, particularly for listed entities. He combines deep technical knowledge of auditing and accounting standards with strong leadership, guiding our audit teams through reporting challenges, regulatory change, and transactions. Tom is also known for elevating audit quality across the board by mentoring teams and embedding innovation and rigour in how audit work is delivered.
Discussing his appointment, Tom said: “Becoming a Partner at HaysMac gives me an enormous sense of achievement and recognition. Having been an integral part of developing the firm’s technical excellence and audit quality improvements I’m delighted to accept the opportunity to lead our Audit Technical team into an exciting future of technical innovation and further evolution. This will continue to support our audit teams in delivering the high-quality services that our clients expect.”
Natasha Frangos, Managing Partner at HaysMac, said: “I’m thrilled to welcome David, Mike, Sabina and Tom into the Partner group. Each of them brings exceptional talent and dedication, enhancing our ability to deliver outstanding service across all sectors. Their leadership will be instrumental as we drive forward with our ambitious growth plans, fostering innovation, excellence, and continuity at HaysMac. These promotions also reflect what sits at the heart of our purpose – For Business. For People. For Good. – ensuring we continue to create impact that benefits our clients, empowers our teams, and makes a positive difference in the wider community.”
This announcement comes off the back of a remarkable 12 months for HaysMac. In addition to a major rebrand, the firm was named one of The Sunday ‘The Sunday Times ‘Best Places to Work 2025 – Big Organisation’ for the second consecutive year, and highly commended in the ‘Best Places to Work for Women’ category. This accolade follows eprivateclient’s ‘Top Accountancy Firms’ for 2024 – an annual listing of the best UK tax advisory firms providing advice to domestic and international private clients, their businesses and their families.’
