get work in LA as drugs counsellor?

I am an english citizen, who has recently completed a Msc in Addiction Psychology, i was hoping to go to the us at some point in the near future and find some work in a drug rehabilitation centre (possibly in Santa Monica) and was looking for advice, from anyone who knows, this could be advice on visa applications, places of work, anything to do with an english person looking for psychological work in the United States?? anything will do ,

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