The Petroleum Ministry has appointed Hudson Andambi as the interim managing director of Kenya Pipeline Company.
This followed Joe Sang and other top managers' Friday arrest on allegations of corruption.
DCI says the hunt for other managers implicated in the Sh1 billion scam is ongoing.
"The ministry in consultation with the chairperson of the KPC board has appointed Andambi...until the board meets to deliberate on the way forward," PS Andrew Kamau said in a notice.
He said the move will ensure that operations continue without interference for purpose of ensuring security of supply of petroleum products.
The KPC managers' arrests started last night after the Director of Public Prosecutions Noordin Haji approved various charges against them.
The Director of Criminal Investigations George Kinoti then ordered his officers to round up all those to be charged.
Sang submitted a letter to the KPC board on Wednesday indicating that he would not be seeking a new term as managing director next year.