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 I-SEM Contact Us 




The I-SEM Project Helpdesk is available Mon-Fri from 9.00am until 5.00pm. We operate a voicemail service if we are unavailable.

ROI: 1800 726772
NI: 0800 0726772
International: +353 (1) 2370584


If you are required to post information to us please use the relevant address below:

          I-SEM Project
160 Shelbourne Road
Dublin 4
          D04 FW28
Republic of Ireland


          I-SEM Project
Castlereagh House
12 Manse Road
Belfast BT6 9RT
Northern Ireland

If you are visiting us please see below links to a interactive Google maps displaying both our locations:

Castlereagh House, Belfast Interactive Map
The Oval, Dublin 4, D04 FW28 Interactive Map

SEMO is a joint venture between EirGrid PLC and SONI Limited