Following university, McGregor-Smith trained for six years as an accountant at
BDO Stoy Hayward.
Mitie Group In 2002, after a brief spell at the
facilities management firm Service Group International (SGI), McGregor-Smith joined
Mitie Group PLC as group financial director. As the first Asian female chief executive of a
FTSE 250 company, the appointment received extensive press coverage. Upon her appointment to the
House of Lords in 2015, after eight years as Chief Executive, McGregor-Smith asked the
Mitie board to begin the process of looking for a replacement as Chief Executive. McGregor-Smith's tenure as CEO initially saw Mitie's top and bottom lines grow, boosted by strong demand for integrated services, but ended with the issuing of a profit warning and a substantial drop in performance. In May 2015 she appeared before senior officials at HMRC to discuss complaints that MiHomecare, a company owned by
Mitie, was failing to pay its employees the minimum wage. In September 2016 shares in Mitie plunged 26% to a four-year low after the company warned that profits would be "very significantly lower" due to "lower UK growth rates and public sector budget constraints". In common with much of the sector,
Mitie faced pressures in 2016/17 and issued profits warnings. In October 2016 McGregor-Smith announced that she was stepping down from the CEO role and would hand over to Phil Bentley, the former Cable & Wireless Communications (CWC) chief executive. Shares in the company closed 2.52pc higher as investors reacted positively to the news of Ms McGregor-Smith’s departure. Internal initiatives at Mitie in which McGregor-Smith has personal involvement include 'Mitie's Got Talent', a company-wide talent contest; and 'Mitie Millions', at which she and Finance Director Suzanne Baxter judge budding entrepreneurs with up to £5m to invest in the winners. As of September 2019, McGregor-Smith was appointed as the Chair of the
Airport Operators Association. In September 2022, McGregor-Smith was appointed as non-executive director at
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