Participants will be provided a digital suite of online self-guided learning materials, including step-by-step treatment materials, client handouts, and "how to" instructions for delivering the treatment. In addition, participants will receive 12 weekly 1-hour live training webinars on delivering LGBTQ-affirmative CBT led by expert trainers.

Participants will be provided a digital suite of online self-guided learning materials, including step-by-step treatment materials, client handouts, and "how to" instructions for delivering the treatment. In addition, participants will receive 12 weekly 1-hour live training webinars on delivering LGBTQ-affirmative CBT led by expert trainers. This arm will also receive one year of ongoing (at least monthly) supervision in LGBTQ-affirmative CBT from an expert supervisor at your center.

Adoption of LGBTQ-affirmative CBT will be assessed on the provider survey as percent of providers who practice LGBTQ-affirmative CBT out of number trained. The range for this measure is 0-100%. Semi-structured qualitative interviews with providers will highlight why and in what cases providers chose not to implement. We will also use secondary data from CenterLink to describe factors of centers choosing not to receive training.

Familiarity with and use of LGBTQ-affirmative CBT skills will be assessed on the provider survey using Familiarity and Use Scale. This instrument contains 14 items, to which participants respond to each item on a Likert scale from 1 ("not at all"/"not at all familiar" ) to 5 ("very often"/"extremely familiar").* The total score is calculated by summing the items, and can range from 1-70. A higher score indicates higher familiarity with and use of LGBTQ-affirmative CBT skills. Administration time is 7 minutes.

*Dependent on the phrasing/context of the item

Modification of LGBTQ-affirmative CBT will be assessed on the provider survey using the Modification and Adaptation Checklist. This instrument contains 14 items as well as corresponding codes (0 -12) that denote different types of modifications. As these codes do not have corresponding values, this measure is not scored. Administration time is

Adaptation to local contexts and clients will be assessed on the provider interview following our published guidance on intentional adaptation to local contexts/clients, as covered in the training.

Maintenance of LGBTQ-affirmative CBT will be assessed on the director survey and provider survey using the Program Sustainability Assessment Tool. This instrument contains 8 subscales and 40 total items, to which participants respond to each item on a Likert scale from 1 ("little or no extent" ) to 7 ("a very great extent"). The total score is calculated by first computing the mean for each subscale, and then computing the means of those scores. The total score can range from 1-7. A higher score indicates stronger maintenance of LGBTQ-affirmative CBT. Administration time is 15 minutes.

operationalized as ongoing program support, funding stability, center capacity, and fit with strategic planning of LGBTQ-affirmative CBT. Assessed via the director survey and the provider survey and interview.

Client anxiety will be assessed on the client survey using Generalized Anxiety Disorder Scale, 7 item Version. Participants respond on a Likert scale from 0 ("not at all") and 3 ("nearly every day"). The total score is calculated by summing the scores for each item, resulting in a range of 0-15. A higher score indicates higher anxiety symptomatology. Administration time is 5 minutes.

Client PTSD symptoms will be measured on the client survey using the PTSD Checklist for Diagnostic and Statistical Manual-5. This instrument contains 20 items, to which participants respond on a Likert scale from 0 ("not at all") to 4 ("extremely") The total score is calculated by summing the scores for each item, resulting in a range of 0-80. A higher score indicates higher PTSD symptomatology. Administration time is 10 minutes.

Client alcohol use behavior will be assessed on the client survey using the Alcohol Use Disorders Identification Test - Consumption. This instrument contains 3 items, to which participants respond on a Likert scale from 0 to 4 (the value of each point changes for each question). The total score is calculated by summing the scores for each item, resulting in a range of 0-12. A higher score indicates greater alcohol consumption. Administration time is 2 minutes.

Client substance use* behavior will be assessed on the client survey using the Drug Use Disorders Identification Test - Consumption. This instrument 4 items, to which participants respond on a Likert scale from 0 to 4 (the value of each point changes for each question). The total score is calculated by summing the scores for each item, resulting in a range of 0-16. A higher score indicates greater substance consumption. Administration time is 2 minutes.

*excluding alcohol

Client internalized stigma will be assessed on the client survey using the 3-item Internalized Stigma subscale of the Lesbian, Gay, Bisexual Identity Scale (LGBIS). Participants respond on a Likert scale from 1 ("disagree strongly" to 6 ("agree strongly"). The total score is calculated by first computing the mean for each subscale, and then computing the means of those scores. The range for possible total scores is 1-18. A higher score indicates greater internalized stigma. Administration time is 2 minutes.

Client social isolation will be assessed on the client survey using the UCLA Loneliness Scale. This instrument contains 3 items, to which participants respond on a Likert scale from 1 ("hardly ever") to 3 ("often"). The total score is calculated by summing the scores for each item, resulting in a range of 1-9. A higher score indicates greater social isolation. Administration time is 2 minutes.

Client emotion dysregulation will be assessed on the client survey using the Difficulties in Emotion Regulation Scale - Short Form. This instrument contains 6 subscales and 18 total items, to which participants respond on a Likert scale from 1 ("almost never") to 5 ("almost always"). The total score is calculated by summing the scores for each item, resulting in a range of 1-18. A higher score indicates greater difficulties emotional regulation. Administration time is 10 minutes.