I was a Chem. Dep'y Tech for several years before moving on to Crisis Intervention Counselor in a private dual diagnosis Chemical Dependency facility.
Basically, you will perform all of the duties described in the posts above. You will obtain the routine vitals, assist with ADLs/BDLs
do lots of one-on-ones, assist with admissions, ecsort clients to groups, often stay with them during group... you will probably drive and/or escort clients to recreational functions, picnics, shopping sprees, etc.
You will have your own tech charting to do and working nights you will more than likely be doing a lot of chart auditing as well.
Many facilities prefer their staff to be in recovery themselves (including their nurses and counselors).. I was one of the very few who was not. Clients do build a better rapport with those staff who have walked in their shoes.
However, I would not offer any information re your personal status unless specifically asked/required... you'll be able to feel that one out.
I hope this will be something that will work for you.. wish you the best, and keep us posted!