Home / Planning Consultants Directory Please note that many of the planners listed will operate on an all-island basis, providing services in a range of areas across a number of counties or internationally. Go back to directory. Add to Address Book. Jacobs Engineering Jacobs Engineering Merrion House Merrion Road Leinster Dublin 4 D04 R2C5 Irelandwork Artola House 3rd and 4th Floors, 91-95 Victoria St Ulster Belfast BT1 4PB United Kingdomwork Home Phone: +353 (01) 269 5666home Home Phone: +44 28 9592 7100home Website: Jacobs Engineering Categories: Belfast, Dublin, Leinster, Northern Ireland, Ulster Updated 2 years ago.