You are best off talking to the folks in the RSC about salary scales but €88-110,000 is serious enough money for the top job ave industrial wage is €30k ish. I know that they have had serious trouble filling the positions. The ads did the rounds in the UK rail press a while back. UK experience transfers well since the rule book and infrastructure rules are based on the Railtrack equivalents
Currently the RSC are based in Blackrock, Dublin about 5 minutes from the station which has direct trains from Maynooth, Drogheda and Gorey in the morning not to mention DART so you can infact live a fair bit out many working in the village do, you never know RSC staff might have free travel... but you will at least get tax relief on a rail ticket
I think this Ballinasole thing is a complete joke pointless but it is part of government policy (flawed totally IMO) I wouldn't blame anyone for not working for them as a result if you are going to have a rail safety body you plonk it at a major railway location
One thing is Irish accident reports are lame (
http://www.platform11.org/resources/rail_safety.php) you don't get the concise style the UK can when they had ex army majors (assuming engineer corps) doing the investigations
BTW the RSC do read this site I have had dealings with them in recent times and found them to be efficient, precise and very tuned in with ongoing issues