1 A For Security is the leading provider of the SIA Door Supervisor training, security guard training, and SIA CCTV training. 1 A For Security is an approved SIA (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 experience and connecting with our associate Security companies. We also provide a door supervisor top-up course for those who are interested to renew their SIA license. Our two days SIA top-up training offers a high pass rate and fast certificates.