| Comtech Services Ltd | 01226 289444 | | Burgess House, 68 Doncaster Road, Barnsley, S70 1TL |  Map & Directions |
| Bonnett Alarms | 01709 544396 | | 77 Northfield Lane, Wickersley, Rotherham, S66 2JA | | Map & Directions |
| Securicom Systems Ltd | 0114 247 7794 | | 4 Hayes Court, Halfway, Sheffield, S20 4TS | | Map & Directions |
| Orbital Communications | 01226 388157 | | 11 Fountain Parade, Mapplewell, Barnsley, S75 6FW | | Map & Directions |
| Mod Alarms | 0845 260 7286 | | 221 Chippinghouse Road, Sheffield, S7 1DQ | | Map & Directions |
| De Taunton | 01226 770802 | | Unit 8, Mount Osborne Business Centre, Mount Osborne Industrial Park , Oa, Barnsley, S71 1HH | | Map & Directions |
| Wire Mesh Guards | 0114 278 6661 | | 28 Johnson Street, Sheffield, S3 8GT | | Map & Directions |
| Cooper Security Systems | 01909 487411 | | 11 Tenby Grove, Worksop, S80 2PP | | Map & Directions |
| A-Lectrician | 01226 724469 | | 52 High Street, Royston, Barnsley, S71 4RF | | Map & Directions |
| Tri Ex Security | 01909 550822 | | Unit 1 North Anston Business Centre, Houghton Road, North Anston Trading Estate, North Anston, Sheffield, S25 4JJ | | Map & Directions |
| S S Security Co Ltd | 0114 258 6187 | | 225 Handsworth Road, Handsworth, Sheffield, S13 9BH | | Map & Directions |
| Olympos Security Services | 01709 739003 | | 10 The Woodway, Sunnyside, Rotherham, S66 3RG | | Map & Directions |
| A M Security Fabrications | 01246 827009 | | Unit 5a, M1 Markham Lane, Commerce Park, Duckmanton, Chesterfield, S44 5HS | | Map & Directions |
| Knox Leisure Securities Ltd | 07869 120766 | | 44 Wellington Street, Sheffield, S1 4HD | | Map & Directions |
| Ace Security Ltd | 01246 277270 | | Unit 1, Burley Close, Chesterfield, S40 2UB | | Map & Directions |
| P A Protection Services | 0114 281 4848 | | Unit 2, 111 Halifax Road, Sheffield, S6 1LB | | Map & Directions |
| C M G Manufacturing | 0114 231 6673 | | 1 Hoyland Road, Sheffield, S3 8AB | | Map & Directions |
| Tandem Training Systems Ltd | 0114 272 7999 | | 90 Garden Street, Sheffield, S1 4BJ | | Map & Directions |
| Shield Alarms Security Centre | 0114 258 8443 | | 629 Chesterfield Road, Sheffield, S8 0RX | | Map & Directions |
| Active Securities | 07970 760915 | | Edale Road, Mastin Moor, Chesterfield, S43 3BB | | Map & Directions |
| Bell Guarding Ltd | 0870 240 6214 | | 400 Cricket Inn Road, Sheffield, S2 5AX | | Map & Directions |
| All Secure Security Solutions Ltd | 01246 554545 | | Beehive Works, Old Road, Chesterfield, S40 2QZ | | Map & Directions |
| Smart Alarms | 0114 234 5513 | | 153 Middlewood Road, Sheffield, S6 4HB | | Map & Directions |
| Insight Security | 0114 269 2629 | | 5 Retford Road, Sheffield, S13 9LA | | Map & Directions |
| Back Stage Security | 0114 221 6888 | | 159 Broad Oaks, Sheffield, S9 3HH | | Map & Directions |
| Attendo Systems Ltd | 01709 389300 | | Unit 1, Centurion Business Park, Bessemer Way, Rotherham, S60 1FB | | Map & Directions |
| Security & Facilities Managment Services Ltd | 0870 241 8423 | | Securities House, 12 Pond Street, Chesterfield, S40 2LE | | Map & Directions |
| Schofield Alarms | 01709 893797 | | The Bungalow, Church St, Bolton-Upon-Dearne, Rotherham, S63 8LP | | Map & Directions |
| A & A Services | 0114 287 2787 | | 22 Laycock Avenue, Aston, Sheffield, S26 2FU | | Map & Directions |
| Direct Link Security Ltd | 01709 821255 | | 125 Duncan Street , Brinsworth, Rotherham, S60 5DD | | Map & Directions |
| Vigil Security Systems | 0114 267 8881 | | 158 Crookes, Sheffield, S10 1UH | | Map & Directions |
| Complete Shutter Services | 0114 233 1077 | | Rawston Spring Way, Middlewood Drive, Sheffield, S6 1TS | | Map & Directions |
| B-Safe Security Systems Ltd | 0800 801 718 | | Storforth Lane, Chesterfield, S40 2TU | | Map & Directions |
| Micro Alarms Ltd | 0114 240 1151 | | Thorncliffe Mews, Newton Chambers Road, Thorncliffe Park Estate, Chapeltown, Sheffield, S35 2PH | | Map & Directions |
| Pro-Guard Security Yorkshire Ltd | 0114 239 3060 | | 290 Hurlfield Road, Sheffield, S12 2SL | | Map & Directions |
| Rowtech Professional Security | 01709 557117 | | Belmont House, Kimberworth Road, Rotherham, S61 1AJ | | Map & Directions |
| Mayson Security Services Ltd | 0114 258 3791 | | 64-82 Broadfield Road, Sheffield, S8 0XL | | Map & Directions |
| Epis Services Ltd | 01709 577736 | | Mexborough Business Centre, College Road, Mexborough, S64 9JB | | Map & Directions |
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