"The execution is only a matter of time," Attorney General Mahbubey Alam told newsmen after 10 members of Quamaruzzaman's family visited him at the prison at downtown Dhaka, where he is expected to be hanged.
The Supreme Court two days ago upheld a previous special tribunal verdict handing him down the death penalty.
Alam added that the prison authorities now just needed the death penalty order or the death warrant to execute the sentence of the 62-year-old Quamaruzzman.
The apex court on Monday issued the abridged version of their judgement while the full text was expected to be out in a few weeks.
The attorney general's comments came as defence lawyers said they awaited full judgement of the Supreme Court against Quamaruzzaman as they planned to file a review petition.
"We will file a review petition within 30 days after receiving the full text of the Supreme Court verdict," Quamarazzaman's counsel Shishir Manir told newsmen.
Until now only one war crimes convict, Jamaat leader Abdul Quader Mollah was executed last year since Bangladesh launched the belated war crimes trial in 2010 while ahead of his execution the apex court had entertained a review petition filed hours ahead of his scheduled execution.
But the petition was rejected the next day, delaying the execution by only 24 hours.
The Supreme Court had on Monday upheld Quamaruzzaman's death penalty 18 months after the special tribunal handed him down the capital punishment.
Jamaat was opposed to Bangladesh's 1971 independence from Pakistan.
The judgment came a day after the war crimes tribunal handed down death penalty to another Jamaat stalwart and media doyen Mir Quasem Ali for war crimes, and four days after party chief Matiur Rahman Nizami was sentenced to death on identical charges.
