Gary Naysmith has agreed a two-year deal at Huddersfield after rejecting the offer of a new contract with Sheffield United.
The Blades had been optimistic that Naysmith would sign a new contract to stay at Bramall Lane but he has decided to embark on a new challenge.
The Scotland left-back has played over 350 times in a career that has included spells with Hearts, Everton and the Blades.
Huddersfield's capture of Naysmith follows the signings of Scott Arfield and Joey Gudjonsson and manager Lee Clark is delighted with his new recruit.
Clark told the club's official website: "Gary is a massive signing - we have worked very hard to get him.
"He has got real experience at the very highest level, but the big thing for me is that from the very first day I met him you can tell he still has unbelievable desire and ambition."
Town goalkeeper Simon Eastwood has been granted a free transfer to allow him to join Football League newcomers Oxford on a two-year deal.
Clark added: "I'd like to wish him all the best at Oxford. Its a good club with good people and hopefully he can make a good career for himself there playing first-team football."