Exeter manager Paul Tisdale has strengthened his squad with the signings of Richard Duffy and James Dunne.
Welsh defender Duffy arrives on a free transfer after being released by Walsall earlier in the summer.
Former Arsenal midfielder Dunne earned his contract with the Grecians thanks to an impressive spell on trial.
Tisdale has also been boosted by the news that playmaker Ryan Harley has signed an extension to his existing Exeter deal.
Harley has made 42 appearances for the club and helped them win promotion to League One at the end of last term.