1 A For Security is the leading provider of the SIA Door Supervisor training, SIA Refresher Door Supervisor training, SIA Security Guard Refresher training, and SIA CCTV training. 1 A For Security is an approved Security Industry Authority training provider. Since 2012 we have trained more than ten thousand satisfied learners who have successfully achieved their SIA Door supervisor course and SIA CCTV course qualifications and got their desired job in the Private security industry. After successfully completing your Door supervisor course and SIA CCTV course with us, we assist you in employment by providing reference. We also provide door supervisor refresher course for those who are interested to renewing their SIA license. Our two days SIA refresher door supervisor training and one day SIA refresher security guard training offers a high pass rate and fast certificates.