There are a number of agencies about who do industrial assignments who could at least try and find him some temporary if not permanent work. One could always lead to the other as well.
There are quite a few in town, not 100% sure on the industrial side but they will have websites to check. He could try Blue Arrow (I think) on Princess St, Brook Street up on Spring Gardens, maybe Polaris on Brown St. Prime Time on St James' Sq too. Best to check if they cover the type of work he is looking for first though. They might be able to suggest other agencies if not.
Supermarket warehouse work could be an idea and plenty of them round this way.