Jimmy Reilly lacked the required experience to manage the island's men's football team.
That's according to one of the most seasoned local coaches, Jersey Scottish boss Pat Brennan.
Reilly resigned as manager of Jersey last week due to "work commitments" after 15 months in the role.
His predecessor, Craig Culkin, also thinks the Scot's coaching pedigree may have cost him.
Attention has now turned to who will replace Reilly.
Both Brennan and Culkin believe former Aston Villa manager and the Jersey FA's current Director of Football, Brian Little, is one of the most likely candidates.
The JFA have kept quiet over their managerial search so far other than to say the vacancy was discussed at their most recent board meeting on Tuesday night.