Arnold has been on the Board since 2011 and was appointed Chair in July 2016.
He is also a senior independent director at Cifas and served as a non-executive director at the UK Atomic Energy Authority, where he chaired the Remuneration Committee.
The majority of his career has been in human resources, involving extensive work on pensions. He is a former Director of Human Resources at Smiths Group PLC.
Arnold has always been active in voluntary and charity work and was awarded an OBE in 2002 for his services to education.