M & M Contractors - Belfast

Clarke - Ballymena

Centum Engineering - Antrim

Mc Cormick Contracts Ltd. - Ballycastle

J. A. McCullough & Co - Ballymena

Smiths Engineering Works (N I) Ltd - Ballymena

McLaughlin & Harvey Ltd - Newtownabbey

M.Hasson and Sons Limited - Ballymena

Ground Check Ltd - Antrim

McAuley Engineering Ltd - Ballymoney