Davies made an announcement on his Facebook account recently and seems set to embark on a new chapter of his life with a whole new team.
"Thank you for everything the past three years, always a man of your word, a man of truth and a family man," Davies said of Sims.
"I'll never forget all the good things you've taught me. Our journey turns to my journey," he added.
An official confirmation that Davies has left his post with Eddie Hearn and Sims Sports has not yet been released, although WBN understands the 25 year-old in on the verge of joining up with alternative representation for the immediate future.
The talented but outspoken fighter has missed out on a spot on the undercard of the Lawrence Okolie v Isaac Chamberlain clash in London next month but is expected to be back in action this spring once his career path is laid out.
Talk of a move to Frank Warren has already been doing the rounds for Davies, who has promised his fans all will be revealed soon enough.
Comments in social media posts to Tommy Coyle were the beginning of the end for Davies and his time with Hearn's Matchroom stable.