Plymouth Argyle have announced that executive director Keith Todd will relinquish his role from 1 January.
Former chairman Paul Stapleton will take over on an interim basis, with more changes to be announced in the next week, said a club statement.
Argyle face a winding-up petition from HM Revenue & Customs over unpaid taxes.
Todd, who was unavailable for comment, is executive chairman of software firm Ffastfill Plc and joined the Argyle board in 2009.
He was awarded a CBE in 2006 for services to the telecoms industry.
Argyle face the threat of being wound up in February if they fail to pay £760,000 in unpaid tax to HM Revenue & Customs.
The League One side, relegated from the Championship in 2010, have experienced dwindling attendances during their first season back in League One.
Just 4,960 fans watched their game against Dagenham & Redbridge in November - over 5,000 down on last season's average league gate.
But they attracted a very healthy 14,347 for their last game - the 2-0 win over local rivals Exeter City on 11 December.
Plymouth's second successive win lifted them to 15th, now three points clear of trouble.
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