Nairobi Hospital has sacked its suspended Chief Executive Officer Gordon Otieno Odundo with immediate effect.
In an internal memo on Wednesday, board chairman said the decision to terminate Mr Odundo's contract was unanimous and that it followed "consideration of all the relevant factors pertaining to the office".
Mr Simba said the board would begin the process of finding a replacement but that Christopher Abeid would serve in acting capacity.
Mr Odundo was sent on a 90-day compulsory leave on December 15, 2018, the board saying in an unsigned and undated statement that the decision was to "allow completion of the ongoing forensic audit."
Photos of the CEO's office locked with a huge chain emerged at the premier city hospital as an embarrassing boardroom fight with the CEO spilt over to the public.
At the time, sources at the hospital said the audit in question ought to have been done as it covered the 2013-16 period, partly when former Health Cabinet Secretary Cleopas Mailu was the chief executive.
Also at the centre of the intrigues was the sacking of two senior administrators.
In March, a letter from Mr Simba to the embattled chief executive said the management had decided to extend the suspension to April 13.