About SEMS Ltd

We have worked on numerous projects within the Custodial Estate including New build Prisons, Numerous new build House blocks, ancillary buildings, Educational units, Workshops, Refurbishments and building upgrades.

We have upgraded systems block by block. System by system.

We have upgraded full establishments on full site wide basis for all types of Alarm systems and LV infrastructure.

We have staff cleared to work across the full range of the custodial estate including the high security.

We have valuable experience of working in live conditions installing all kinds of Alarm, Security and essential services equipment where areas cannot be decanted or vacated.

Where possible we provide a turnkey solution to installing critical services in Custodial premises.