Background: Gender minority youth (GMY; children, adolescents, and young adults whose gender differs from their birth-assigned sex) have a disproportionately high risk for serious mental health problems relative to cisgender youth (whose gender aligns with their birth-assigned sex). These mental health disparities are exacerbated by treatment engagement barriers, including the dearth of mental health providers trained in evidence-based practices (EBPs) that help GMY engage and benefit from mental health treatment. These EBPs are treatment tailoring techniques for any psychotherapy modality; they are not a standalone clinical intervention. Research: This research will develop and pilot test a training intervention to increase mental health providers’ use of EBP with GMY. Intervention design (Aim 1) employs community-engaged and user-centered design methods with key stakeholders: GMY, their parents, and mental health providers. The training will target three mechanisms hypothesized to result in behavioral change in providers (increased EBP adoption): knowledge, attitudes, and self-efficacy. mHealth technology and AI will enhance intervention scalability. Intervention refinement (Aim 2) will involve providers completing usability testing via individual meetings wherein they complete the training and provide real-time feedback on content and functionality. Feedback from usability testing will be used to iteratively refine the training and ensure its readiness for pilot testing. The pilot test (Aim 3) will be an open trial in a multi-clinic mental health agency, aimed at examining the feasibility and acceptability of conducting a future RCT. Effectiveness and implementation data from both providers and consumers (GMY and their parents) will be collected and analyzed. Candidate’s Career Development, Goals, and Environment: The proposed Mentored Patient-Oriented Research Career Development Award (K23) will provide Dr. Price with the advanced training and skills necessary to launch an independent research program focused on increasing EBP implementation to reduce documented mental health disparities. Formal training and mentorship in (T1) mechanism-driven intervention development and testing, (T2) user-centered design, (T3) community-engaged research, and (T4) implementation science will support the successful execution of this research and Dr. Price’s career development. The immense resources available at Boston College, coupled with the vast expertise of mentorship and advisory team members, will further ensure the success of the research