Mr Walton-Green is a Chartered Accountant and a member of the Chartered Institute of Taxation. Mr Walton-Green is a serial entrepreneur with significant interests in biotech, pharmaceutical distribution, renewables and financial services. Before this, Mr Walton-Green was the CEO of Gresham Computing plc for 10 years, gaining significant exposure to the banking and financial services sector at a senior level. Mr Walton-Green spent the first 13 years of his career in practice as a Chartered Accountant predominately with Ernst & Young and Deloitte.