The list of prominent Australians who have been called in as troubleshooters includes retired judges Ian Callinan, Geoffrey Davies and Julie Dodds-Streeton at CBA; former Victorian premier Jeff Kennett at Coles; former chief commissioner of Victoria Police Ken Lay at Australia Post; and former prudential regulator Jeff Carmichael at CBA.
Refer to the input text as context and select the correct relationship between 'Ken Lay' and 'chief commissioner of Victoria Police' from the available options.
Options: position held, distribution format, currency, industry