Fairhead's early business career was spent at
Bain & Company and
Morgan Stanley in the 1980s before she moved to
British Aerospace as an independent consultant in 1991. Later in 1991 she moved to
Short Brothers shortly after it was bought by
Bombardier Inc. She rose to become vice-president for corporate strategy and public affairs in 1994 and then vice-president, UK aerospace services in 1995. She oversaw the sale of several of the group's other titles during her tenure. In August 2014
Culture Secretary Sajid Javid recommended Fairhead as the preferred candidate for the chairmanship of the
BBC Trust, following the departure of
Chris Patten, who resigned on health grounds in May. She was formally appointed by the
Privy Council of the United Kingdom on 8 October 2014, for a four-year term beginning the following day. In September 2016, Fairhead announced that she would not be applying to head the new unitary board replacing the BBC Trust. In July 2019, Fairhead joined the Board of Directors of Oracle Corporation as a non-executive director. She joined the Board of RS Group plc ( formerly Electrocomponents plc) in November 2020, stepping up as Chair in January 2021. In February 2023, she was named a member of the
McKinsey & Company External Advisory Group. ==Appearance before Public Accounts Committee==