These courses are offered by the regional offices of the Addiction Technology Transfer Center.
You can access the training calendar here: http://nattc.org/calendar/search.aspx?&keyword=clinical%20supervision
Alternatively, you can contact your closest ATTC office to find out when they are next planning to offer the course. To find your closest ATTC office, you can check this page of the ATTC website: http://nattc.org/regional-centers/search.aspx
If you do enroll in the in-person course, you will need to bring your Certificate of Completion from the online course with you on the first day. You may take the online course at any time prior to the in-person training.