Hartlepool United have signed defender Aristote Nsiala from League Two rivals Grimsby Town.
The 24-year-old DR Congo international joined the Mariners in 2014 from Southport.
The former Everton trainee has also had spells with Macclesfield and Accrington Stanley, as well as playing in Vietnam.
Meanwhile, winger Nathan Thomas, 21, has agreed a new contract with Pools, having scored five times in 22 games since his January arrival.
Nsiala is the sixth new signing so far this summer.
Find all the latest football transfers on our dedicated page.