Analyze the relationship between 'Ken Lay' and 'chief commissioner of Victoria Police' within the context of the input sentence.
Options: position held, industry, currency, distribution format

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.
position held