wear another hat
To hold or function in another position or role simultaneously. Few know that the renowned actress wears another hat as an accomplished neuroscientist.
wear another hat
Also, wear a different hat or two hats ; 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]