Humer, who is currently chief executive of the Swiss drugs company Roche and has been a non-executive director of Diageo for the past two years, will take up the position from July 1 2008, when current chairman Lord Blyth of Rowington retires.
Paul Walsh, chief executive of Diageo, said he looked forward to working with Humer: "We have a shared view in Diageo's ability to develop as a truly sustainable global business through the delivery of continued commercial success, enhancing our financial strength and making further progress against our social and environmental policy commitments."
Diageo has also announced the appointment of Catherine Jessup as the new chief financial officer for Diageo North America. Jessup joins Diageo from
the Topps Company, where she worked for 12 years, following a 13-year period at PepsiCo.