Abstract: A computerized system for certifying workers to work on a structure having RF antennae, having: (a) an access module to access the computerized system; (b) a non-site-specific training module that displays on-line information about RF antennae; (c) a site-specific training module that displays on-line information about the at least one RF antenna on the structure; (d) a certification module that conducts on-line testing of workers on the non-site-specific information and certifies workers for work at a job site by having the workers acknowledge that they have seen the site-specific information; and (d) a database module which stores: (i) non-site-specific information, (ii) site-specific information, and (iii) records of which workers have both have passed the on-line non-site-specific testing and seen the site-specific information.