"Lehmann should join the team in late May after the Indian Premier League. He will join the team when they are playing ODIs against Ireland and Scotland and before they go to England for the Champions Trophy," a PCB source told PTI informing that the burly Aussie has agreed in principle.
Pakistan is due to play a series of ODIs against Ireland and Scotland in May before the Champions Trophy.
"The two parties will decide after the Champions Trophy whether they should sign an extended contract," the source added.
Lehmann, 44, who played 27 tests and 117 one-day internationals has taken to coaching after his retirement and is currently the coach of Kings XI Punjab.