For best chances, go to the job fair in Denver on April 8th and 9th. Otherwise apply online at http://www.polar.org.
By the way, there is a hairdresser job down here. Can’t have shaggy haired Antarcticans. Check with the housing people at the fair. I think they hire the hairdresser. 42 years old would put you just over the median age. The oldest that I’ve seen here in the last few years was 82. Lots in their 60’s.