I wish you the best of luck with this endeavour.
In Order to work in Ireland, there is certain steps you have to follow. You can learn more about working in Ireland through the links below. The Citizens Information Website
contains a full section of support for coming to work in Ireland.
For the most current and accurate Passport and Visa advice, I recommend that you directly contact your local Irish Embassy/Consulate
prior to travelling to the Republic of Ireland, and your local British Embassy/High Commission
or Consular Office, should you wish to fly into Northern Ireland.
When it comes to looking for work in Ireland there are plenty of job sites out there, The Main job sites for the Republic of Ireland is Recruit Ireland, Indeed, Monster.ie and Jobs.ie. In Northern Ireland, you have nijobfinder.co.uk, recruitni.com, indeed and jobcentreonline.com.
This should be enough information to get you started, but if there is anything else you need advice with don't hesitate to ask