Joe Jonas — Shadowed By Well-Known Addiction Specialist

Joe Jonas has a new guy in his entourage — a well-known addiction specialist who once worked with Demi Lovato, our sources has learned.

We noticed the guy hanging with Joe as they walked in to a recording studio together in West Hollywood Thursday afternoon.

His name is Mike Bayer — the CEO and founder of Cast Recovery Services.


According to his profile on the company website, Bayer is described as being “well known for quickly responding to crisis situations” … typically of the substance abuse/mental health variety.

It”s unclear why he”s with Joe — but when photogs tried to talk to the rock star on his way into the  building, he made it clear he was not down for a conversation.

As our sources previously reported, sources connected with the band are saying a possible breakup was tied to a conflict over musical direction, but who knows …

We reached out to Joe”s rep — who had no comment.