Bournemouth chairman and owner Bill Foley said: We're excited to bring Tiago to the club. Neill and Simon have worked closely with him on a number of deals in recent seasons and have always been very impressed by him.
Tiago arrives with great experience at some high-profile clubs already in his young career. Hiring somebody with his background reinforces the ambition that we have to succeed in the Premier League and in our multi-club project."
Pinto told afcb.co.uk: I'm very happy to be joining AFC Bournemouth during such an exciting time for the club.
I would like to express my gratitude to Bill, Neill and Simon. The vision that they have laid out to me is something that I can't wait to be a part of.
I look forward to getting to work over the summer as we prepare for the new season."