| Intruder International Plc | 01279 758870 | | 6-7 The Downs, Dunmow, CM6 1DS |  Map & Directions |
| Urmet Domus Communication & Security Ltd | 01371 874923 | | 7 Chelmsford Road, Oak Industrial Park, Dunmow, CM6 1XN | | Map & Directions |
| Gainsborough Events & Security Services | 01371 879640 | | Gallop House, Haslers Lane, Dunmow, CM6 1XS | | Map & Directions |
| Wellington Security Products | 01371 831731 | | Po Box 5991, Thaxted, Dunmow, CM6 2WS | | Map & Directions |
| Gold Seal Security Installations | 0800 542 9122 | | 24 Yeomans Close, Thorley, Bishop's Stortford, CM23 4EU | | Map & Directions |
| Advance Security Electronics | 0870 165 1999 | | East Hanningfield Road, Sandon, Chelmsford, CM2 7TP | | Map & Directions |
| Fortune Security | 01245 423032 | | 7 Purbeck Court, Chelmsford, CM2 8YX | | Map & Directions |
| Crown Security Systems | 01277 228828 | | 14 Plashet Gardens, Brentwood, CM13 2BS | | Map & Directions |
| Maritime Asset | 01245 364062 | | 159 Main Road, Great Leighs, Chelmsford, CM3 1NP | | Map & Directions |
| All Tag Security Ltd | 01279 453008 | | 13 The Spire Green Centre, Harlow, CM19 5TR | | Map & Directions |
| Headline Security Management | 01277 260500 | | 2 Weald Road , Brentwood, CM14 4SX | | Map & Directions |
| Reliance Security Services Ltd | 01245 496866 | | Fourth Floor Bray House, 101 New London Road, Chelmsford, CM2 0PP | | Map & Directions |
| Bradling Security Ltd | 01376 328100 | | Suite 11 The Centre, Lower Chapel Hill, Lakes Industrial Park, Braintree, CM7 3RU | | Map & Directions |
| Adml Ltd | 0800 085 6459 | | 63 St. Anthonys Drive, Chelmsford, CM2 9EH | | Map & Directions |
| Jmh Technology | 0845 053 7457 | | Unit 3 Highlands Farm, Berden, Bishop's Stortford, CM23 1AB | | Map & Directions |
| Scooter Store Ltd | 01279 453565 | | Unit 11, Italstyle Buildings, Cambridge Road, Harlow, CM20 2HE | | Map & Directions |
| Red Spot | 01376 339725 | | Braintree Enterprise Centre, 46 Springwood Drive, Braintree, CM7 2YN | | Map & Directions |
| Gardiner Security Ltd | 01245 464044 | | 2 Montrose Road, Chelmsford, CM2 6TX | | Map & Directions |
| Store Vision | 01279 415572 | | 13 The Spire Green Centre, Harlow, CM19 5TR | | Map & Directions |
| Yeoman Monitoring Services | 01279 635464 | | 5-7 Horsecroft Place, Harlow, CM19 5BT | | Map & Directions |
| Meteor Parking & Security | 0870 060 1001 | | Bassingbourn House Mid Stay Car Park, Thremhall Avenue, London Stansted Airport, Stansted, CM24 1PZ | | Map & Directions |
| Electronic Video Security | 01992 524001 | | 284 High Road, North Weald, Epping, CM16 6EG | | Map & Directions |
| React Security Systems | 01245 351799 | | 114 Vicarage Road, Chelmsford, CM2 9BT | | Map & Directions |
| Mayfair Security Ltd | 01621 772580 | | 62 Hillside Road, Southminster, CM0 7AL | | Map & Directions |
| Approved Security | 0845 658 2225 | | 7c Beckingham Business Park, Beckingham Street, Tolleshunt Major, Maldon, CM9 8LZ | | Map & Directions |
| Ace Security & Electrical Ltd | 01376 528852 | | Lakes Industrial Park, Lower Chapel Hill, Braintree, CM7 3RU | | Map & Directions |
| Time Security | 01245 614122 | | 612 Galleywood Road, Chelmsford, CM2 8BY | | Map & Directions |
| Ace Security & Electrical | 01245 263999 | | 145 New London Road, Chelmsford, CM2 0QT | | Map & Directions |
| Integrity 2000 | 01277 262000 | | Po Box 2222, Great Warley, Brentwood, CM13 3HY | | Map & Directions |
| Asset Security Management Ltd | 01279 721999 | | 111 London Road , Sawbridgeworth, CM21 9JJ | | Map & Directions |
| Clearview Communications Ltd | 01245 214104 | | 33 Robjohns Road, Chelmsford, CM1 3AG | | Map & Directions |
| North West Security | 01992 570404 | | 14 Hemnall Street, Epping, CM16 4LW | | Map & Directions |
| Central Access Systems Ltd | 01277 363666 | | Fyfield Business & Research Park, Unit6 Fyfield Road , Ongar, CM5 0GN | | Map & Directions |
| Complete Security Ltd | 01277 655012 | | 1 Radford Way, Billericay, CM12 0AA | | Map & Directions |
| Kirkman Security Systems | 01376 344986 | | 11 Byng Gardens, Braintree, CM7 9TJ | | Map & Directions |
| Regency Security Services Ltd | 01621 843388 | | Heybridge Business Centre, 110 The Causeway, Heybridge, Maldon, CM9 4ND | | Map & Directions |
| Grosvenor Technology Ltd | 01279 838000 | | Millars Three, Southmill Road, Bishop's Stortford, CM23 3DH | | Map & Directions |
| Thorndon Security | 01245 475476 | | Unit 2 Parklands Farm, Lower Green, Galleywood, Chelmsford, CM2 8QS | | Map & Directions |
| Property Protection Ltd | 01277 812813 | | 17b Hordon Industrial Estate, Brentwood, CM13 3XE | | Map & Directions |
| Holmesdale Integrated Security Systems Ltd | 01279 722299 | | 111 London Road, Sawbridgeworth, CM21 9JJ | | Map & Directions |
| Gainsborough Events & Security Services | 01279 776161 | | Saven End, Farnham, Bishop's Stortford, CM23 1HJ | | Map & Directions |
| Basenet Services Ltd | 01245 266026 | | 240 Rainsford Road, Chelmsford, CM1 2PN | | Map & Directions |
| M J H Security Systems | 01268 419090 | | Little Burstead Mead, Rectory Road, Little Burstead, Billericay, CM12 9UA | | Map & Directions |
| Icts | 01279 680523 | | Enterprise House, Bassingbourn Road, London Stansted Airport, Stansted, CM24 1QW | | Map & Directions |
| Aurora Security | 01245 362362 | | Longlands Farm, Boreham Road, Great Leighs, Chelmsford, CM3 1PR | | Map & Directions |
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