Appointed at the start of the 2003/04 season, Morgan took on a very difficult full-time role at the club but is believed to be looking at a return to his former club Woking in a commercial capacity.
In the same announcement, the club have stated that Graham Hortop has agreed to step in to the position as Acting Secretary while a search for a successor is carried out.
The move comes following the low-key appointment of CEO Doug Wilson who joined the club during the summer months and now looks set to push his role at the club in to the limelight.