Srivastava, a 1989-batch IPS officer of Gujarat cadre, was in December last year inducted into SPG on deputation from the Intelligence Bureau.
The Appointments Committee of the Cabinet (ACC) has approved an extension for Srivastava till October 6, 2016, said an order issued by the Department of Personnel and Training.
He will be reporting back to the IB after completion of his extended tenure.
Srivastava, the senior-most IPS officer in the SPG, is also holding charge of the post of chief of the elite force, which guards the Prime Minister and some other VVIPs.