| Glenworth Security Ltd | 07909 483010 | | Prospect House, Kilton Crescent, Worksop, S81 0AS |  Map & Directions |
| A D S Security Ltd | 01909 474183 | | 28 Overend Road , Worksop, S80 1QF | | Map & Directions |
| Cooper Security Systems | 01909 487411 | | 11 Tenby Grove, Worksop, S80 2PP | | Map & Directions |
| Medicare Systems Ltd | 01909 542828 | | Unit 11 Carlton Phoenix Industrial Estate, Kilton Road, Worksop, S80 2EE | | Map & Directions |
| Minder Alarm Co | 01226 370100 | | 1 Market Place, Penistone, Sheffield, S36 6DA | | Map & Directions |
| P N Alarms | 01709 700390 | | 267 Wickersley Road , Rotherham, S60 4JS | | Map & Directions |
| Orbital Communications | 01226 388157 | | 11 Fountain Parade, Mapplewell, Barnsley, S75 6FW | | Map & Directions |
| P A Protection Services | 0114 281 4848 | | Unit 2, 111 Halifax Road, Sheffield, S6 1LB | | Map & Directions |
| Porter Security Services Ltd | 0114 285 2952 | | 2 Baxter Road, Sheffield, S6 1JF | | Map & Directions |
| Ashton Security Systems | 0114 275 6335 | | 119-125 Portland Street, Sheffield, S6 3DN | | 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 |
| Temple Security Ltd | 01709 874600 | | Unit 1, Farfield Park, Manvers, Rotherham, S63 5DB | | Map & Directions |
| Technology Solutions | 0114 275 2383 | | Spartan Works, 20 Carlisle Street, Sheffield, S4 7LJ | | Map & Directions |
| Comsec | 0114 242 4778 | | 10 Anston Close, Anston, Sheffield, S25 4EZ | | Map & Directions |
| Reflex Systems Ltd | 01709 701977 | | Lowton Way, Hellaby, Rotherham, S66 8RY | | Map & Directions |
| C M G Manufacturing | 0114 231 6673 | | 1 Hoyland Road, Sheffield, S3 8AB | | Map & Directions |
| All Secure Security Solutions Ltd | 01246 554545 | | Beehive Works, Old Road, Chesterfield, S40 2QZ | | Map & Directions |
| Shef-Guard | 0114 273 8458 | | 9 Well Meadow Street, Sheffield, S3 7GS | | Map & Directions |
| Geoff Arnold Audio Visual Services | 01709 526029 | | 20 Arthur Street, Rawmarsh, Rotherham, S62 5ND | | Map & Directions |
| Comtech Services Ltd | 01226 289444 | | Burgess House, 68 Doncaster Road, Barnsley, S70 1TL | | Map & Directions |
| Trust Security Systems Ltd | 0870 777 0629 | | 88 Derby Road, Chesterfield, S40 2EF | | Map & Directions |
| Aspro Crest Ltd | 01709 543899 | | 280 Bawtry Road, Wickersley, Rotherham, S66 1JY | | Map & Directions |
| Back Stage Security | 0114 221 6888 | | 159 Broad Oaks, Sheffield, S9 3HH | | Map & Directions |
| M C A Technics | 0114 288 1332 | | 15 St. Mary Crescent, Deepcar, Sheffield, S36 2TL | | Map & Directions |
| Security Blinds Ltd | 01709 363535 | | Hope Street, Rotherham, S60 1LH | | Map & Directions |
| Alite Services | 0114 279 8485 | | Unit 20b Prospect House, City Road, Sheffield, S2 5HH | | Map & Directions |
| Vault Vision Security | 01623 812722 | | Systems House, The Hill, Glapwell, Chesterfield, S44 5NB | | Map & Directions |
| C L Brookes Ltd | 01246 232033 | | 69a Cotterhill Lane, Brimington, Chesterfield, S43 1NL | | Map & Directions |
| C & H Alarm Systems | 0114 287 3664 | | 19 Robin Place, Aston, Sheffield, S26 2GG | | Map & Directions |
| Bell Guarding Ltd | 0870 240 6214 | | 400 Cricket Inn Road, Sheffield, S2 5AX | | Map & Directions |
| White Rose Security Ltd | 01709 588773 | | 136a Doncaster Road, Mexborough, S64 0JW | | Map & Directions |
| Allsafe Security | 01909 569402 | | 7 Grasmere Close, Anston, Sheffield, S25 4GF | | Map & Directions |
| Security Camera Systems Ltd | 01246 297567 | | 18 Upland Rise, Chesterfield, S40 2DD | | Map & Directions |
| B-Safe Security Systems Ltd | 0800 801 718 | | Storforth Lane, Chesterfield, S40 2TU | | Map & Directions |
| Ace Marketing Utilities | 01909 772224 | | 41 Broad Bridge Close, Kiveton Park, Sheffield, S26 6SL | | Map & Directions |
| Epis Services Ltd | 01709 577736 | | Mexborough Business Centre, College Road, Mexborough, S64 9JB | | Map & Directions |
| Bell Guarding | 0870 240 6214 | | 1 Orgreave Drive, Sheffield, S13 9NR | | Map & Directions |
| De Taunton | 01226 770802 | | Unit 8, Mount Osborne Business Centre, Mount Osborne Industrial Park , Oa, Barnsley, S71 1HH | | Map & Directions |
| Wilkin Alarms Ltd | 0114 267 0011 | | 466-468 Ecclesall Road, Sheffield, S11 8PX | | Map & Directions |
| Ace Security Ltd | 01246 277270 | | Unit 1, Burley Close, Chesterfield, S40 2UB | | Map & Directions |
| Security & Facilities Managment Services Ltd | 0870 241 8423 | | Securities House, 12 Pond Street, Chesterfield, S40 2LE | | Map & Directions |
| S D E Electrical | 0114 234 3097 | | 3 Oldfield Avenue, Stannington, Sheffield, S6 6DQ | | Map & Directions |
| Complete Shutter Services | 0114 233 1077 | | Rawston Spring Way, Middlewood Drive, Sheffield, S6 1TS | | Map & Directions |
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