ESL Engineering Ltd - Coleraine

Hutchinson - Coleraine

M S M Contracts - Belfast

Vaughan Engineering Group Ltd - Newtownabbey

Edgewater Contracts & Specialist Joinery - Antrim

Tal Civil Engineering - Ballymena

The CAB Group - Newtownards

MMB Surfacing Ltd. - Antrim

BMC Engineering - Magherafelt

Tir-con Engineering Ltd - Magherafelt