Security Industry Authority

This is the official web page for anyone interested in joining PCS in the Security Indusry Authority (SIA).

The SIA is the regulatory body for the security industry in the United Kingdom and Northern Ireland.

We are a non-departmental public body responsible directly to the Home Secretary. The sectors we currently regulate are door supervision, close protection, security guarding, public space CCTV, vehicle immobilisers and key holders.

We have about 170 people working in the SIA, a number of whom are remote workers.


We won recognition in February 2009 and signed our recognition agreement in June 2009. PCS is the largest civil service union.

Updated 8 Aug 2016

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