Sean had been among the favourites to replace Frank Hadden as head coach at Edinburgh, but The Scotsman reports that Edinburgh are prepared to move ahead this season with an amalgam of coaches and players running the side.
Alongside the only remaining full-time coach Carl Hogg, the injured Todd Blackadder is set to co-ordinate the backroom team, and former Heriot's coach Phil Smith, now Edinburgh's Academy manager, will help alongside experienced players Peter Jorgenson and Dave Hewett.
Hadden said: "I am really confident with the guys we have got in situ at the moment that Edinburgh can move forward in the short-term. That will give us time to plan for the future."