He takes over from Roy Coyle, who was caretaker manager following the resignation of Alan Kernaghan.
New Glentoran manager Gary Haveron is set for a baptism of fire tomorrow as his first game is a Premiership derby at the Oval against unbeaten Linfield.
The former Ballymena and Coleraine player was yesterday confirmed as Glens boss on an 18-month contract.
He got the job ahead of candidates including striker Nacho Novo who joined the east Belfast club in the summer.
But 35-year-old Haveron says the ex-Rangers star will be a key member of his squad.