Mary Harpley

Chief Officer of the GLA

As the Head of the GLA's corporate leadership team, the Chief Officer assumes responsibility as Head of Paid Service for the strategic management of GLA activity and functions.

Responsibilities include:

  • To provide leadership to ensure the effective delivery of the Mayor priorities
  • To provide leadership to ensure the smooth and effective delivery of the Mayor’s priorities.
  • To provide strategic expertise to the Assembly to ensure it achieves its objectives of holding the Mayor to account and championing the role that the Assembly plays in relation to scrutiny.
  • To manage the GLA resources effectively, ensuring a high quality diverse workforce which provides world class policy advice to the Mayor and Assembly.
  • To act as Greater London Returning Officer for the GLA.


Mary Harpley joined the GLA as Chief Officer in September 2018. Mary has previously held a number of roles in local and regional government as: Chief Executive, London Borough of Hounslow; Chief Executive, Cherwell District Council; and Corporate Director at Advantage West Midlands, the former Regional Development Agency for the West Midlands.

Before joining the public sector, Mary worked for McKinsey & Company as a management consultant, and for Reed Elsevier in their book and magazine publishing businesses.

Mary lives in west London with her family.