With the SIA Door Supervisor Licence you can work in bars, clubs, pubs, restaurants, warehouses, retail outlets, shops, shopping centres, office buildings and many other places. NOTE: We highly recommend the SIA Door Supervisor Training Course over the SIA Security Guarding Training Course. While a Licensed Door Supervisor can work as a Security Guard, a licensed Security Guard is unable to work as a Door Supervisor. Obtaining the Level 2 Door Supervisor qualification is the first step towards getting an SIA Licence to work in the security industry. If you are looking to work in the Security industry as a Security Guard or a Door Supervisor, this is the right course for you.