These latest figures, which show little improvement on previous checks in Inverness in December and across Scotland in November (see related stories), suggest that many Scottish operators are not complying with the new regime.
Of the 10 licensed premises and 16 door supervisors checked in the Glasgow operation, eight were warned for offences of working without a SIA licence.
The SIA said that action against licensees and security directors suspected of deploying unlicensed staff may follow.
Jennifer Pattinson, an SIA Head of Investigation said, that those working without licenses were putting the public at risk.
She warned: “Door supervisors, working without an SIA licence, and those deploying them, are committing an offence. Licensees risk having their premises closed.
“We reminded licensees of their legal obligations when employing their own staff or using contracted door staff. We also urge other licensees to check that their security suppliers operate within the law.”
Superintendent John Farrell from Strathclyde Police also warned bar and pub owners that their licenses could be at list if they employee unlicensed staff, adding that there will be further joint operations with the SIA.
But he also added: “Six of the eight door staff warned had made steps towards becoming compliant with the law.”
It is an offence to work as a door supervisor (in house and contract) in Great Britain without an SIA licence. A Door Supervisor licence is required if manned guarding activities are undertaken in relation to licensed premises.