Doran Consulting provided civil and structural engineering design services for both Moyle Interconnector converter stations and their associated AC switchyards at Auchencrosh and Ballycronan More under a design-and-construction contract with Farrans Construction. Its work included regrading the Ballycronan More valley to create a level platform, designing piled foundations for converter buildings and switchgear, addressing rock excavation at Auchencrosh, and specifying drainage, silt control and ancillary structures such as control buildings, transformer bays, fire‑fighting facilities, storage and generator buildings. This civil and structural design underpinned the successful construction and long‑term stability of the HVDC converter installations.