wear another hat

Idioms  

1. Also,; wear more than one hat. Function in a different or more than one capacity or position, as in I'm wearing another hat today; yesterday I was a housewife, today I'm an attorney, or I wear two hats—are you asking me as a member of the city council or as a storeowner? This metaphoric expression alludes to headgear worn for different occupations. [Mid-1900s]

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Example Sentences

But the negotiations in Minsk – the first meeting between the two presidents since a 15-minute conversation in Normandy in June – will allow him to wear another hat, that of the peacemaker.

From The Guardian