Tesco is looking for a new group IT chief with this month's departure of Colin Cobain.
Cobain has not announced where he is going to, and Tesco has not said who will replace him.
Cobain has had an important role in the rapidly expanding company's entry into new markets, not least the US. He has also overseen the group's adoption of radio frequency identification (RFID) technology in its supply chain.
Cobain joined Tesco in 2001.