The paper presents how the Grid/Web Services architecture can constitute a knowledge Grid that will facilitate access to vocational training courses in the framework of a job-rotation e-service implementing the job-rotation model. The Job-Rotation e-service is an integrated on-line system that links training policy with employment policy. On one hand it supports Enterprises to find the proper training for their employees and on the other it supports them to find adequate unemployed resources to replace their own while on training. All involved parties benefit from this rotation. The main problem of the job rotation e-service, and generally of systems providing information on vocational training, is the lack of up to date information on running courses due to large administrative costs. The Grid /Web Services solution can solve these problems by providing accurate information, directly from the organizations who offer the courses, and reducing administrative costs for the job rotation e-service.