We investigated the additive and interactive effects of self-efficacy as a possible moderator of the effects of a job-search workshop on re-employment outcomes. We recruited 659 recently unemployed respondents and randomly assigned them to an experimental group invited to participate in the job-search workshop (n = 442), or a control group (n = 217). All respondents provided pretest data using self-administered questionnaires, and posttest data using questionnaires mailed to them 1 and 6 months after the workshop. No direct effects of the intervention on re-employment outcomes were found. The pretest–posttest change in self-efficacy interacted with the experimental condition to predict 3 re-employment outcomes. However, only 1 of the 3 moderating effects found supported our prior expectation in this regard.