David Caygill was appointed as an Associate Commissioner in January 2008.

David Caygill was appointed Chair of the Electricity Commission in October 2007 and was previously Deputy Chair of the Commerce Commission.  His governance experience includes chairing the Advisory Committee on Official Statistics (since 2005); the Ministerial Inquiry into the Electricity Industry (2000); the Grid Security Committee and the Electricity Governance Establishment Committee which designed governance rules for the electricity industry between 2001 and 2003.

David Caygill served as a Member of Parliament for 18 years, including six years (1984-90) as a Cabinet Minister.