The fate of 16 chief officers hangs in the balance after their jobs were advertised.
In the advert on the devolved unit's website, the County Public Service Board has invited eligible candidates to submit their applications by December 3.
The county has also advertised the post of deputy County Secretary and members of the County Public Service Board.
It also emerged Governor Sospeter Ojaamong was waiting for a report on performance before deciding the fate of county ministers.
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Contracts of the county executive committee members as well as those of chief officers will expire in February next year.
The ministers and chief officers were handed two-year contracts last year. They are renewable subject to performance.
The head of the evaluation committee, Henry Wati, had said they will be looking at the extent to which each of the senior officials had achieved their objectives since they were appointed.
“We are going to give them scores in every area of operation and we shall also rank departments according to how they have performed,” said Wati.
He added:” Each department is given money every financial year and what is to be done explained. That is why it is good to know who achieved their objectives and who did not.”
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Mr Wati said best performers should be rewarded.
Robert Papa, the county head of strategy and public service delivery unit, said the objective of performance appraisals is to ensure ministers and chief officers meet the expectations of residents as far as service delivery is concerned.