Background. Sexual aggression by men with intellectual disability (ID) is a serious problem requiring attention from the relevant agencies. Training for staff working with this problem is often not given sufficient attention and is rarely evaluated. In the present study, an introductory workshop for direct care staff that aimed to increase knowledge and improve attitudes towards work with this client group was evaluated. Method. Sixty-six staff working in inpatient and community settings completed a 2.5-day workshop. Before training began, the participants completed a survey questionnaire concerning their experiences of work with this client group. An assessment of their knowledge and attitudes was carried out prior to and at the end of training in order to evaluate any changes. The participants also rated the effectiveness of the workshop and their level of satisfaction with the training at the end of the workshop. Results. The participants' knowledge and attitudes improved significantly following the workshop. Staff with greater experience over time and those who had worked with fewer sex offender clients responded to different aspects of the training. The participants' ratings indicated that they were highly satisfied with the training and found it to be effective. Conclusions. Brief workshop training is acceptable to and can be effective in improving the knowledge, attitudes and confidence of direct care staff working with sex offenders with ID. However, because the results are based on participant self-report, caution should be exercised concerning their external validity.