| Special Events Ltd | 028 9024 4613 | | Washington House, 14-16 High Street, Belfast, BT1 2BD |  Map & Directions |
| Age Concern Enterprise N I Ltd | 028 9023 3341 | | 10 College Street , Belfast, BT1 6BT | | Map & Directions |
| Corps Of Commissionaires Management Ltd | 028 9023 0031 | | 9-13 Waring Street, Belfast, BT1 2DX | | Map & Directions |
| North Sec Security Services Ltd | 028 7126 6113 | | 1 Bay Road, Londonderry, BT48 7SH | | Map & Directions |
| Gardiner Security Ltd | 028 9068 2994 | | Unit 6 Enterprise House, Boucher Place, Belfast, BT12 6HT | | Map & Directions |
| Foyle Security Systems | 028 7181 2185 | | 8 Mclean Road, Campsie Industrial Estate, Eglinton, Londonderry, BT47 3XX | | Map & Directions |
| Euro Electronic Security Ltd | 028 7134 4770 | | 39 Clooney Terrace, Londonderry, BT47 6AP | | Map & Directions |
| Stran Security | 028 9187 4490 | | 30a Castle Street, Comber, Newtownards, BT23 5DZ | | Map & Directions |
| Greenhills Security Products Ni Ltd | 028 9037 0030 | | 18a Duncrue Crescent, Belfast, BT3 9BW | | Map & Directions |
| Brinks Allied Ltd | 028 9077 3442 | | 28-30 Duncrue Road, Belfast, BT3 9BP | | Map & Directions |
| Control Zone Security | 028 9753 3506 | | 112 Aughnaskeagh Road, Dromara, Dromore, BT25 2NT | | Map & Directions |
| Pegasus Security Group | 028 9092 3331 | | Wellington Park, Belfast, BT9 6DJ | | Map & Directions |
| Parking Access Service Systems Ltd | 028 9145 4453 | | Enterprise House , 2-4 Balloo Avenue , Bangor, BT19 7QT | | Map & Directions |
| Radiocontact Ltd | 028 9040 1742 | | 37 Montgomery Road, Belfast, BT6 9HL | | Map & Directions |
| Mid Ulster Security | 028 7946 9911 | | 48 Lurganagoose Road, Knockloughrim, Magherafelt, BT45 8QY | | Map & Directions |
| Mallusk Security Services Ltd | 028 9047 1394 | | 495 Upper Newtownards Road, Belfast, BT4 3LL | | Map & Directions |
| Access Video Projects | 028 4484 2685 | | 37 Ballybrannagh Road , Downpatrick, BT30 7HF | | Map & Directions |
| Protec Security Systems Ltd | 028 9267 7700 | | 137A Hillsborough Old Road , Lisburn, BT27 5QE | | Map & Directions |
| B S S | 028 9062 8867 | | Unit 16 Work West Enterprise Centre, 301 Glen Road, Andersonstown, Belfast, BT11 8BU | | Map & Directions |
| A C S Control Systems Ltd | 028 9187 8063 | | 10 Cuttles Ridge, Comber, Newtownards, BT23 5YT | | Map & Directions |
| B M F Systems | 028 9050 4133 | | 21 Mallusk Drive, Mallusk Enterprise Park, Newtownabbey, BT36 4GN | | Map & Directions |
| Spa Security Solutions | 028 9756 1065 | | 8 Spa Road, Ballynahinch, BT24 8LU | | Map & Directions |
| Estate Services Ltd | 028 7126 7268 | | 1 Iona Park, Londonderry, BT48 9LH | | Map & Directions |
| Rf Concepts | 028 9041 9596 | | Unit C16, Carrowreagh Road, Dundonald Enterprise Park, Dundonald, Belfast, BT16 1QT | | Map & Directions |
| B H P Alarms | 028 7126 2757 | | Unit B3 Balliniska Business Park Springtown Industrial Estate, Springtown Road, Londonderry, BT48 0LY | | Map & Directions |
| South Antrim Alarms Ltd | 028 9267 5568 | | Unit 6, 10 Graham Gardens, Lisburn, BT28 1XE | | Map & Directions |
| A & S Security Systems | 028 2565 8969 | | 8 Woodcroft Rise, Ballymena, BT42 1TA | | Map & Directions |
| Video Security Solutions Ltd | 028 9066 3919 | | 16-18 Lower Windsor Avenue, Belfast, BT9 7DW | | Map & Directions |
| G D I Security | 028 3025 0833 | | 55a Derryleckagh Road, Newry, BT34 2NL | | Map & Directions |
| Electronic & Security Services | 028 9066 3510 | | 50belcher Place Place, Belfast, BT12 6AT | | Map & Directions |
| Adt Fire & Security Ltd | 028 7126 3626 | | 20 Springrowth, Springtown Road, Londonderry, BT48 0LY | | Map & Directions |
| Initial Shorrock Security | 028 9045 9441 | | 213 Castlereagh Road, Belfast, BT5 5FH | | Map & Directions |
| Checkmate Guarding & Security | 028 9260 4850 | | 11b Waterside, Coleraine, BT51 3DP | | Map & Directions |
| Secure Vision Systems | 028 9182 8068 | | Unit C7 Ards Business Centre, Jubilee Road, Newtownards, BT23 4YH | | Map & Directions |
| Adt Fire & Security | 028 6632 2472 | | Enniskillen Business Centre, Tempo Road, Enniskillen, BT74 6HR | | Map & Directions |
| Sword Security Ltd | 028 9050 3040 | | 68 Donegall Pass, Belfast, BT7 1BU | | Map & Directions |
| Medway Security Distribution | 028 9077 7600 | | 41 Duncrue Crescent, Belfast, BT3 9BW | | Map & Directions |
| Securicor Ltd | 028 9038 1430 | | 1 Mallusk Road, Blackwater Business Park, Newtownabbey, BT36 4AA | | Map & Directions |
| Premier Security Systems | 07802 217442 | | 23a Credenhill Park, Dunmurry, Belfast, BT17 0ES | | Map & Directions |
| Mercury | 028 9081 3030 | | Unit 20 Edgar Industrial Estate, Comber Road, Carryduff, Belfast, BT8 8AN | | Map & Directions |
| N D S Systems Ltd | 028 9145 6014 | | Enterprise House, 2-4 Balloo Avenue , Bangor, BT19 7QT | | Map & Directions |
| Chief Security Systems | 028 9042 3042 | | 222 Bangor Road , Holywood, BT18 0JF | | Map & Directions |
| Truline Cctv | 028 4461 6475 | | 14 Lindisfarne Road, Downpatrick, BT30 6HP | | Map & Directions |
| Scan Alarms & Security Systems Ltd | 028 9034 2233 | | 52 Trench Road, Newtownabbey, BT36 4TY | | Map & Directions |
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