A randomized controlled trial was used to test (1) the efficacy of a two-session career development workshop for college student participants; (2) the effect of counselor self-disclosure on outcomes; and (3) the effect of infusing calling and vocation concepts on outcomes. Both standard (person-environment fit) and calling/vocation-infused interventions improved career decision self-efficacy relative to a wait-list control. Counselor self-disclosure also increased participant career decision self-efficacy in both conditions and increased appraisals of meaning in life for participants in calling/vocation-infused workshops. Incorporating considerations of calling and vocation neither detracted from nor added to workshop effectiveness. Career development workshops were supported, as was the use of moderate counselor self-disclosure. Suggestions for career counseling practice and intervention research are discussed. (Contains 1 table.)