Sir Hamid, who has been an Ofsted Board member since 2019, will serve for a period of up to 5 months until a new substantive Chair is appointed.
Alongside his role on the board, Sir Hamid is Chief Executive of Star Academies.
Dame Christine, who has spent 4 and a half years as Chair of Ofsted, will step down at the end of March.
His Majesty’s Chief Inspector, Sir Martyn Oliver, said:
On behalf of Ofsted, I’d like to thank Dame Christine for her service during her time as Chair. She has successfully led the board through a time of significant challenge and change, culminating in our current consultation on the future approach to education inspections.
I am very pleased Sir Hamid will be supporting us as interim Chair, while the government recruits Dame Christine’s successor. I look forward to working more closely with him and, in time, with a new Chair.