It is understood that Ryan, who is a former pundit for Sky Sports News, has already started work in preparation for the new season.
"I am excited to be with Worcester Warriors, and I am looking forward to what is a huge challenge," he said in a statement.
"Right from the outset to come back into rugby was about finding something that did excite me. In my own head I got to a place where I thought I was going to carry on with TV.
"I didn't really see a challenge that lit the fire back inside, and I think conversations with Cecil (Worcester chairman Cecil Duckworth) is something that started to do that."
Worcester have won just five games this season.