Choudhury, 58, was appointed head of India's largest power producer by the previous UPA Government in September 2010 for five years term, which was extendable till he achieves retirement at the age of 60 years.
He completes the five-year term at the end of the month and the Ministry of Power has decided not to extend the term till December 31, 2016 when he would have achieved superannuation age, sources privy to the development said.
Sources said in a departure from convention where PSU board members including Chairman are selected by government headhunter, PESB, the Power Ministry has formed a Search Committee headed by Power Secretary to look for a replacement for Choudhury.
It remains unclear who the ministry will give charge of NTPC head when Choudhury's term comes to an end on August 31.
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Normally the senior most director on the company board is given the charge but there are instances during the past one year where senior bureaucrats in the ministry are given additional responsibility to manage the PSU.
The government had in June this year refused to extend the tenure of SAIL Chairman C S Verma till his superannuation four years later.
Verma was appointed SAIL Chairman and Managing Director for a five-year term in June 2010 by the previous UPA government, but was eligible for an extension till he attained the superannuation age of 60 years in September 2019.
His five-year tenure ended on June 10 and Steel Secretary Rakesh Singh has been given the charge of SAIL Chairman for three months.
A civil engineer from BITS with a post graduation in management from IIT, Choudhury started his career in 1979 and worked in prominent public and private sector companies such as RITES, IRCON and DLF etc.
He was earlier CMD, National Buildings Construction Corporation (NBCC), the largest construction Central Public Sector Undertaking (CPSU) of India.