Deirdre Mahlan

Interim Chief Financial Officer

Deirdre Mahlan

Deirdre Mahlan was appointed Interim Chief Financial Officer of Diageo plc in August 2025.

Current external appointments

  • Non-Executive Director – Kimberly-Clark Corporation

 

Previous Diageo roles

  • President – Diageo North America
  • Chief Financial Officer – Diageo plc
  • Deputy Chief Financial Officer – Diageo plc
  • Head of Tax and Treasury – Diageo plc
  • SVP Finance and Chief Financial Officer – Diageo North America
  • VP Finance, Diageo and Guinness USA – Diageo North America

 

Previous relevant experience

  • Chief Executive Officer and Board Chair – The Duckhorn Portfolio
  • Non-Executive Director, Chair of Audit and Risk Committee – Haleon plc
  • Non-Executive Director and Audit Committee Chair – Experian plc