| Glenworth Security Ltd | 07909 483010 | | Prospect House, Kilton Crescent, S81 0AS |  Map & Directions |
| Thor Security | 01246 825437 | | 251 Shuttlewood Road, Bolsover, S44 6PA | | Map & Directions |
| Knox Leisure Securities Ltd | 07869 120766 | | 44 Wellington Street, Sheffield, S1 4HD | | Map & Directions |
| Tandem Training Systems Ltd | 0114 272 7999 | | 90 Garden Street, Sheffield, S1 4BJ | | Map & Directions |
| Special Events Security Ltd | 0114 279 8888 | | Provincial House, Solly Street, Sheffield, S1 4BB | | Map & Directions |
| Abs Security Services Ltd | 01709 373424 | | Po Box 638, Rotherham, S60 9BQ | | Map & Directions |
| Ace Security Ltd | 01246 277270 | | Unit 1, Burley Close, Chesterfield, S40 2UB | | Map & Directions |
| Securite Security Systems | 01709 702997 | | 160 Bawtry Road , Bramley, Rotherham, S66 2TS | | Map & Directions |
| Alite Services | 0114 279 8485 | | Unit 20b Prospect House, City Road, Sheffield, S2 5HH | | Map & Directions |
| Ble Ltd | 01246 436361 | | Manor House, Church Street, Eckington, Sheffield, S21 4BH | | 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 |
| C & H Alarm Systems | 0114 287 3664 | | 19 Robin Place, Aston, Sheffield, S26 2GG | | Map & Directions |
| Newman Support Services Ltd | 01709 760696 | | 9c Sandygate, Wath-Upon-Dearne, Rotherham, S63 7LN | | Map & Directions |
| Initial Fire & Security | 0114 245 7597 | | Unit 3 Rotunda Business Centre, Thorncliffe Road, Chapeltown, Sheffield, S35 2PG | | Map & Directions |
| A & A Services | 0114 287 2787 | | 22 Laycock Avenue, Aston, Sheffield, S26 2FU | | Map & Directions |
| Allsafe Security | 01909 569402 | | 7 Grasmere Close, Anston, Sheffield, S25 4GF | | Map & Directions |
| Shield Alarms Security Centre | 0114 258 8443 | | 629 Chesterfield Road, Sheffield, S8 0RX | | Map & Directions |
| Mod Alarms | 0845 260 7286 | | 221 Chippinghouse Road, Sheffield, S7 1DQ | | 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 |
| Temple Security Ltd | 01709 874600 | | Unit 1, Farfield Park, Manvers, Rotherham, S63 5DB | | Map & Directions |
| P N Alarms | 01709 700390 | | 267 Wickersley Road , Rotherham, S60 4JS | | Map & Directions |
| M C A Technics | 0114 288 1332 | | 15 St. Mary Crescent, Deepcar, Sheffield, S36 2TL | | Map & Directions |
| Comsec | 0114 242 4778 | | 10 Anston Close, Anston, Sheffield, S25 4EZ | | Map & Directions |
| Olympos Security Services | 01709 739003 | | 10 The Woodway, Sunnyside, Rotherham, S66 3RG | | Map & Directions |
| Insight Security | 0114 269 2629 | | 5 Retford Road, Sheffield, S13 9LA | | Map & Directions |
| S S Security Co Ltd | 0114 258 6187 | | 225 Handsworth Road, Handsworth, Sheffield, S13 9BH | | Map & Directions |
| White Rose Security Ltd | 01709 588773 | | 136a Doncaster Road, Mexborough, S64 0JW | | Map & Directions |
| Bell Guarding Ltd | 0870 240 6214 | | 400 Cricket Inn Road, Sheffield, S2 5AX | | Map & Directions |
| G-Teck Electrical | 0114 287 4002 | | 27 Eden Grove, Swallownest, Sheffield, S26 4TP | | Map & Directions |
| Epis Services Ltd | 01709 577736 | | Mexborough Business Centre, College Road, Mexborough, S64 9JB | | Map & Directions |
| R Ladlow | 01226 764991 | | 30 Middlecliffe Drive, Crow Edge, Sheffield, S36 4HB | | Map & Directions |
| Architectural Ltd | 0114 288 0041 | | 22c Orgreave Crescent, Sheffield, S13 9NQ | | Map & Directions |
| Porter Security Services Ltd | 0114 285 2952 | | 2 Baxter Road, Sheffield, S6 1JF | | Map & Directions |
| Trust Security Systems Ltd | 0870 777 0629 | | 88 Derby Road, Chesterfield, S40 2EF | | Map & Directions |
| Security Camera Systems Ltd | 01246 297567 | | 18 Upland Rise, Chesterfield, S40 2DD | | Map & Directions |
| Chapeltown Alarms | 0114 286 9094 | | Westwood Road, The Old Warehouse, High Green, Sheffield, S35 4LE | | Map & Directions |
| P A Protection Services | 0114 281 4848 | | Unit 2, 111 Halifax Road, Sheffield, S6 1LB | | Map & Directions |
| Ashton Security Systems | 0114 275 6335 | | 119-125 Portland Street, Sheffield, S6 3DN | | Map & Directions |
| Pioneer Security Systems | 0114 261 1309 | | 41 Clun Street, Sheffield, S4 7JS | | Map & Directions |
| Bell Guarding | 0870 240 6214 | | 1 Orgreave Drive, Sheffield, S13 9NR | | Map & Directions |
| Secor Sheffield Ltd | 0114 243 4999 | | Banners Buildings, 620 Attercliffe Road, Sheffield, S9 3QS | | Map & Directions |
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