"A person who was in their employment cannot reasonably be assumed to be fair while dealing with his ex-masters in the discharge of his official duties," he said in his letter to chief minister Bhupinder Singh Hooda.
The letter refers to the state government's orders dated November 23 through which Haryana Civil Services officer Vivek Atray was given the charge of Joint Secretary, Information Technology Department.
However, the state government in a revised order the following day gave Atray the charge of Deputy Secretary of the same department.
Atray declined to comment to Khemka's letter saying it was the prerogative of the state government to post him to any post.
Official sources said that UPSC has cleared the name of Atray for promotion to IAS from the Haryana Cadre and the notification of the same is expected soon.
In the letter handed by Khemka to the chief minister's office yesterday, the senior IAS officer opposed Atray's posting in IT department after his (Atray) "employment" in two private companies related to IT sector for two years.
Atray had served as director, Information Technology in the Chandigarh administration earlier and had dealt with consulting companies including KPMG and Price Waterhouse Coopers (PwC) in his official capacity, Khemka mentions.