There are almost no paid geologist positions at McMurdo. We do have a GIS position. There is however a ton of geological work being done by the science groups. Since we don’t have rain there is a minimum amount of erosion, so whereever rocks are exposed, it’s a goldmine for the geologists. Write to NSF or follow the links at http://www.polar.org to see if you can find any info on which universities are sending people down. The Brits , Kiwi’s and the Aussies also have antarctic bases and do similar research. Not having a science oriented job down here leaves me at a disadvantage in pointing you in the right direction. If you don’t have any luck, write back and we’ll do some digging.
You’ll have to get cracking soon as the science groups are probably in their planning stages by now for the next season.