Assistant manager John Yems has left Exeter after deciding he could not give his full commitment to the job.
Yems' family are based in Sussex and Paul Tisdale's number two, who helped the club to reach League One after joining last year, did not feel he could do the job unless he was based permanently in Devon.
He told the club's official website: "I have thoroughly enjoyed my time at the club and have loved every minute of it, but with the club stepping up to another level I know I can't do the job I need to do unless I'm based here permanently. When you've got a family it isn't that easy to just up sticks and relocate."
City boss Tisdale added: "John was a key part of the team last season and his contribution cannot be underestimated.
"We are very sorry to see him depart but understand his reasons for leaving and remain grateful for all the time and effort he put in."
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