This pilot study evaluated the efficacy of a brief cognitive behavioral therapy (CBT) intervention program designed to reduce excessive pre-enlistment drinking behaviors in a sample of Irish Navy recruits undergoing a 16-week basic training course. Participants were randomly allocated to either a treatment or control group ( N = 13 each). The program was conducted over four consecutive 1.5-hour weekly sessions. Data were collected at pre and post intervention as well as at a 2-month follow-up. In comparison to those in the control group, participants who received the intervention reported increased scores ( p 0.05) in readiness to change drinking at time 2 and reduced scores in binge drinking ( p 0.05) at time 3. There were also marginal changes in self-efficacy and risky drinking behavior. This work adds to the evidence of the emerging efficacy of a workplace CBT intervention for unhealthy drinking.