This study seeks primarily to test, in a three-arm randomized controlled trial (RCT), the efficacy of Project IMPACT, an intervention that integrates Behavioral Activation (BA) with HIV risk reduction (RR) counseling for HIV-uninfected men who have sex with men (MSM) with stimulant use disorder at risk for HIV via sexual behavior. HIV-uninfected MSM with a diagnosis of stimulant use disorder will be randomized 2:2:1 to three arms: (1) the Project IMPACT intervention, BA-RR counseling, which lasts ten sessions; (2) the time- and intensity-matched control condition, including ten sessions of relaxation therapy with educational support; and (3) the standard of care (SOC) comparison condition, including two equivalent sexual risk-reduction counseling sessions. Participants will be followed for one year post-randomization, with assessments at months four, eight, and 12.