It was reported over the weekend that John Muckler had been told by owner Eugene Melnyk he would be replaced as general manager.
There's also speculation Bryan Murray, whose contract as head coach expires June 30, could be promoted to GM.
Neither Murray or Muckler would comment on the reports Sunday.
The Senators went an impressive 48-25-9 in the regular season, and advanced to the Stanley Cup final, shaking off the tag of post-season underachievers. But they seemed to run out of steam in the final, losing to the Anaheim Ducks in five games.
The news conference is scheduled for 1 p.m. ET.