Yes — but only if you pick licensed casino sites. Neteller itself is one of the most secure payment processors in the world. It uses 128-bit SSL encryption certified by VeriSign, which is the same level of protection used by major banks. Your card or bank details are stored with Neteller, not passed on to the casino. That's a meaningful layer of privacy.
The risk isn't Neteller. It's unlicensed casinos. If you deposit at an unlicensed operator and something goes wrong, you have no recourse — Neteller can't get your money back from a rogue site. Every casino on our list is licensed in a reputable jurisdiction (Malta Gaming Authority, Isle of Man, or equivalent) and is legally accessible to Irish players.
My advice: Before you deposit anywhere, look for the licensing badge at the bottom of the casino's homepage. If you can't find one, leave.