According to an official of the Omer Associates team, Aamir will play for them in the tournament whose winner every season is promoted to the first class ciruit.
"Aamir has signed the contract today and we are happy to give him a platform to make his comeback to domestic cricket," the official said.
The Omer Associates team, which is owned and run by a leading businessman and cricket fanatic, Nadeem Omar features prominently in the T20 events in Ramazan and in club tournaments but has not been successful in qualifying beyond the Grade-2 Championship.
"The reason for this is that the top players we employ for our T20 events are not available for us during the Grade-2 competition," the official said.
"We are hoping that the presence of Aamir will lead to a change of fortunes," he added.
Nadeem Omar, well known for his philanthropy, recently donated nearly seven million rupees to help the Pakistan Hockey Federation send the national team for the Champions Trophy in India.
In the Ramazan events, the Omar Associates side employes leading Pakistani players and have remained unbeaten in the major T20 events.
Aamir was recently allowed by the International Cricket Council to resume playing domestic cricket although his five-year ban for spot fixing ends in early September this year.
The left arm pacer played his first club match in four years time last week in Lahore capturing three wickets for his team.