Security Systems in Sheffield, South Yorkshire
| Name & Address | Phone # | Website |
| Comsec PO Box 161, Sheffield, South Yorkshire S9 1TR | 0114-242 4778 |  |
| Initial Electronic Security Unit 3 Thorncliffe Pk Estate, Sheffield, South Yorkshire S35 2PH | 0114-245 7597 | |
| Jenbra Security Thorncliffe Hall, Sheffield, South Yorkshire S35 2PX | 0114-246 0001 | |
| Securicom Systems (UK) Ltd 4 Hayes Court, Sheffield, South Yorkshire S20 4TS | 0114-247 7794 |  |
| Shef-Guard 9 Well Meadow Street, Sheffield, South Yorkshire S3 7GS | 0114-273 8458 | |
| Tri Ex Security Unit 1/North Anston Business Centre, Sheffield, South Yorkshire S25 4JJ | 01909 550822 | |
