Re: Zodiac Driver?
Given your age, experience and how long you'd like to spend in Antarctica I think your best bet is maybe as crew on one of the supply ships.
Boat driving is a skill that several people on any base with boats would be expected to have. As well as a boat man, there may be marine scientists, the base commander, diving officer who could also be able to drive a boat along with others maybe who have an interest in learning. So in itself this is very unlikely to help you find a job on an Antarctic base.
However as a general crew member, it may be an additional skill that is useful to you. I'm not sure about the regulations or qualifications required, you would have to Google that and research it further.