Sometimes in English, we refer to our different personalities or roles in life as ‘hats’, for example: If you are a person who is a teacher, a parent and also someone who likes extreme sports you might be about to walk into a room where your children are arguing and say to your friend ‘time to put my parent hat on now’. Likewise, you might be in a situation where you are considering approaches or opinions from different points of views “If I put my teacher hat on, this doesn’t seem like a sensible idea, but as someone who loves extreme sports I say we go for it!” Someone who ‘wears more than one hat’ therefore, is a person who has a number of different distinct roles or responsibilities that they move to and from at different times depending on what is required of them. This is a useful expression in both social and professional contexts.

1. Jane wears many hats. She's a doctor, writer, and also a part-time musician.

1. We don't have a lot of staff, so I'm required to wear more than one hat at the company. I simultaneously take care of the administrative and marketing side of the business.
2. Peter's versatility means that he wears more than one hat at the school. Not only does he teach a few different subjects but he also coaches the sports teams.